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  • Dordrecht : Springer  (135)
  • Berlin/Heidelberg  (63)
  • English  (198)
  • Danish
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  • 2015-2019  (77)
  • 2005-2009  (121)
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  • English  (198)
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  • 1
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    Fluid/rock interaction and mass transfer in continental subduction zones: constraints from trace elements and isotopes (Li, B, O, Sr, Nd, Pb) in UHP rocks from the Chinese Continental Scientific Drilling Program, Sulu, East China (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: In order to better understand the role of fluids during subduction and subsequent exhumation, we have investigated whole-rock and mineral chemistry (major and trace elements) and Li, B as well as O, Sr, Nd, Pb isotopes on selected continuous drill-core profiles through contrasting lithological boundaries from the Chinese Continental Scientific Drilling Program (CCSD) in Sulu, China. Four carefully selected sample sets have been chosen to investigate geochemical changes as a result of fluid mobilization during dehydration, peak metamorphism, and exhumation of deeply subducted continental crust. Our data reveal that while O and Sr-Nd-Pb isotopic compositions remain more or less unchanged, significant Li and/or B isotope fractionations occur between different lithologies that are in close contact during various metamorphic stages. Samples that are supposed to represent prograde dehydration as indicated by veins formed at high pressures (HP) are characterized by element patterns of highly fluid-mobile elements in the veins that are complementary to those of the host eclogite. A second sample set represents a UHP metamorphic crustal eclogite that is separated from a garnet peridotite by a thin transitional interface. Garnet peridotite and eclogite are characterized by a 〉10% difference in MgO, which, together with the presence of abundant hydroxyl-bearing minerals and compositionally different clinopyroxene grains demonstrate that both rocks have been derived from different sources that have been tectonically juxtaposed during subduction, and that hydrous silicate-rich fluids have been added from the subducting slab to the mantle. Two additional sample sets, comprising retrograde amphibolite and relatively fresh eclogite, demonstrate that besides external fluids, internal fluids can be responsible for the formation of amphibolite. Li and B concentrations and isotopic compositions point to losses and isotopic fractionation during progressive dehydration. On the other hand, fluids with isotopically heavier Li and B are added during retrogression. On a small scale, mantle-derived rocks may be significantly metasomatized by fluids derived from the subducted slab. Our study indicates that during high-grade metamorphism, Li and B may show different patterns of enrichment and of isotopic fractionation.
    Keywords: Fluid/rock interaction; Elemental transfer; Isotopic fractionation; Subduction and exhumation; Sulu ; 551 ; Earth Sciences; Mineralogy; Mineral Resources; Geology
    Language: English
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  • 2
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    The Itajaí foreland basin: a tectono-sedimentary record of the Ediacaran period, Southern Brazil (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The Itajaí Basin located in the southern border of the Luís Alves Microplate is considered as a peripheral foreland basin related to the Dom Feliciano Belt. It presents an excellent record of the Ediacaran period, and its upper parts display the best Brazilian example of Precambrian turbiditic deposits. The basal succession of Itajaí Group is represented by sandstones and conglomerates (Baú Formation) deposited in alluvial and deltaic-fan systems. The marine upper sequences correspond to the Ribeirão Carvalho (channelized and non-channelized proximal silty-argillaceous rhythmic turbidites), Ribeirão Neisse (arkosic sandstones and siltites), and Ribeirão do Bode (distal silty turbidites) formations. The Apiúna Formation felsic volcanic rocks crosscut the sedimentary succession. The Cambrian Subida leucosyenogranite represents the last felsic magmatic activity to affect the Itajaí Basin. The Brusque Group and the Florianópolis Batholith are proposed as source areas for the sediments of the upper sequence. For the lower continental units the source areas are the Santa Catarina, São Miguel and Camboriú complexes. The lack of any oceanic crust in the Itajaí Basin suggests that the marine units were deposited in a restricted, internal sea. The sedimentation started around 600 Ma and ended before 560 Ma as indicated by the emplacement of rhyolitic domes. The Itajaí Basin is temporally and tectonically correlated with the Camaquã Basin in Rio Grande do Sul and the Arroyo del Soldado/Piriápolis Basin in Uruguay. It also has several tectono-sedimentary characteristics in common with the African-equivalent Nama Basin.
    Keywords: Dom Feliciano Belt; Ediacaran; Foreland basin; U–Pb SHRIMP ages; Provenance ; 551 ; Earth Sciences; Geophysics/Geodesy; Geology
    Language: English
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  • 3
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    Petrographical and petrophysical properties of sandstones: statistical analysis as an approach to predict material behaviour and construction suitability (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Most studies dealing with material properties of sandstones are based on a small data set. The present study utilizes petrographical and petrophysical data from 22 selected sandstones and ~300 sandstones from the literature to estimate/predict the material and weathering behaviour of characteristic sandstones. Composition and fabric properties were determined from detailed thin section analyses. Statistical methods applied consist of data distributions with whisker plots and linear regression with confidence regions for the petrophysical and weathering properties. To identify similarities between individual sandstones and to define groups of specific sandstone types, principal component and cluster analyses were applied. The results confirm an interaction between the composition, depositional environment, stratigraphic association and diagenesis, which leads to a particular material behaviour of sandstones. Three different types of pore radii distributions are observed, whereby each is derived from different pore space modifications during diagenesis and is associated with specific sandstone types: (1) bimodal with a maximum in capillary and micropores, (2) unimodal unequal with a maximum in smaller capillary pores and (3) unimodal equable with a maximum in larger capillary pores. Each distribution shows specific dependencies to water absorption, salt loading and hygric dilatation. The strength–porosity relationship shows dependence on the content of unstable lithic fragments, grain contact and type of pore radii distribution, cementation and degree of alteration. Sandstones showing a maximum of capillary pores and micropores (bimodal) exhibit a distinct hygric dilatation and low salt resistance. These sandstones are highly immature sublitharenites–litharenites, characterized by altered unstable rock fragments, which show pointed-elongated grain contacts, and some pseudomatrix. Quartz arenites and sublitharenites–litharenites which are strongly compacted and cemented, show unimodal unequal pore radii distributions, low porosity, high strength and a high salt resistance. The presence of swellable clay minerals in sublitharenites–litharenites leads to a medium to high hygric dilatation, whereas quartz arenites show little hygric dilatation. Sandstones with unimodal equal pore radii distribution mostly belong to weakly compacted and cemented mature quartz arenites. These are characterized by high water absorption and high porosity, low to medium strength and a low salt resistance. The data compiled in this study are used to create a sandstone quality catalogue. Since material properties are dependent on many different parameters of influence, the transition between different lithotypes is fluent.
    Keywords: Sandstones; Pore space; Prediction; Weathering behavior; Compressive strength ; 551 ; Earth Sciences; Geology
    Language: English
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  • 4
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    Lattice-preferred orientations of late-Variscan granitoids derived from neutron diffraction data: implications for magma emplacement mechanisms (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The lattice-preferred orientation (LPOs) of two late-Variscan granitoids, the Meissen monzonite and the Podlesí dyke granite, were determined from high-resolution time-of-flight neutron diffraction patterns gained at the diffractometer SKAT in Dubna, Russia. The results demonstrate that the method is suitable for the LPO analysis of polyphase, relatively coarse-grained (0.1–6 mm) rocks. The Meissen monzonite has a prominent shape-preferred orientation (SPO) of the non-equidimensional minerals feldspar, mica and amphibole, whereas SPO of the Podlesí granite is unapparent at the hand-specimen scale. The neutron diffraction data revealed distinct LPOs in both granitoids. The LPO of the non-equidimensional minerals feldspar, mica and amphibole developed mainly during magmatic flow. In the case of the Meissen monzonite, the magmatic flow was superimposed by regional shear tectonics, which, however, had no significant effect on the LPOs. In both samples, quartz shows a weak but distinct LPO, which is atypical for plastic deformation and different in the syn-kinematic Meissen monzonite and the post-kinematic Podlesí granite. We suggest that, first of all, the quartz LPO of the Meissen monzonite is the result of oriented growth in an anisotropic stress field. The quartz LPO of the Podlesí granite, which more or less resembles a deformational LPO in the flattening field of the local strain field, developed during magmatic flow, whereby the rhombohedral faces of the quartz crystals adhered to the (010) faces of aligned albite and to the (001) faces of zinnwaldite. Due to shape anisotropy of their attachments, the quartz crystals were passively aligned by magmatic flow. Thus, magmatic flow and oriented crystal growth are the major LPO-forming processes in both granitoids. For the Meissen monzonite, the solid-state flow was too weak to cause significant crystallographic re-orientation of the minerals aligned by magmatic flow. Finally, the significance of our results for the evaluation of the regional tectonic environment during magma emplacement is discussed. The discussion on the regional implications of the more methodologically oriented results provides the basis for future, more regionally aimed studies in view of the fabric characteristics of such plutons and their developing mechanisms.
    Keywords: Neutron diffraction; Lattice-preferred orientation; Shape-preferred orientation; Magmatic flow; Podlesí granite; Meissen Massif ; 551 ; Earth Sciences; Geology; Geophysics/Geodesy
    Language: English
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  • 5
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    The Neoproterozoic-early Paleozoic metamorphic and magmatic evolution of the Eastern Sierras Pampeanas: an overview (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The Eastern Sierras Pampeanas were structured by three main events: the Ediacaran to early Cambrian (580–510 Ma) Pampean, the late Cambrian–Ordovician (500–440 Ma) Famatinian and the Devonian-Carboniferous (400–350 Ma) Achalian orogenies. Geochronological and Sm–Nd isotopic evidence combined with petrological and structural features allow to speculate for a major rift event (Ediacaran) dividing into two Mesoproterozoic major crustal blocks (source of the Grenvillian age peaks in the metaclastic rocks).This event would be coeval with the development of arc magmatism along the eastern margin of the eastern block. Closure of this eastern margin led to a Cambrian active margin (Sierra Norte arc) along the western margin of the eastern block in which magmatism reworked the same crustal block. Consumption of a ridge segment (input of OIB signature mafic magmas) which controlled granulite-facies metamorphism led to a final collision (Pampean orogeny) with the western Mesoprotrozoic block. Sm–Nd results for the metamorphic basement suggest that the TDM age interval of 1.8–1.7 Ga, which is associated with the less radiogenic values of εNd(540) (−6 to −8), can be considered as the mean average crustal composition for the Eastern Sierras Pampeanas. Increasing metamorphic grade in rocks with similar detrital sources and metamorphic ages like in the Sierras de Córdoba is associated with a younger TDM age and a more positive εNd(540) value. Pampean pre-540 Ma granitoids form two clusters, one with TDM ages between 2.0 and 1.75 Ga and another between 1.6 and 1.5 Ga. Pampean post-540 Ma granitoids exhibit more homogenous TDM ages ranging from 2.0 to 1.75 Ga. Ordovician re-activation of active margin along the western part of the block that collided in the Cambrian led to arc magmatism (Famatinian orogeny) and related ensialic back-arc basin in which high-grade metamorphism is related to mid-crustal felsic plutonism and mafic magmatism with significant contamination of continental crust. TDM values for the Ordovician Famatinian granitoids define a main interval of 1.8–1.6, except for the Ordovician TTG suites of the Sierras de Córdoba, which show younger TDM ages ranging from 1.3 to 1.0 Ga. In Devonian times (Achalian orogeny), a new subduction regime installed west of the Eastern Sierras Pampeanas. Devonian magmatism in the Sierras exhibit process of mixing/assimilation of depleted mantle signature melts and continental crust. Achalian magmatism exhibits more radiogenic εNd(540) values that range between 0.5 and −4 and TDM ages younger than 1.3 Ga. In pre-Devonian times, crustal reworking is dominant, whereas processes during Devonian times involved different geochemical and isotopic signatures that reflect a major input of juvenile magmatism.
    Keywords: Magmatism-metamorphism; Sm–Nd systematics; Tectonic evolution; Neoproterozoic-early Paleozoic orogenies; Eastern Sierras Pampeanas ; 551 ; Earth Sciences; Geophysics/Geodesy; Geology
    Language: English
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  • 6
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    Moisture expansion as a deterioration factor for sandstone used in buildings (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The expansion processes that develop in building stones upon changes of moisture content may be an important contributing factor for their deteriorations. Until recently, few data could be found in the literature concerning this parameter and weathering processes. Moreover, the processes that may be responsible for the moisture related expansion of natural building stones are not yet completely understood. To further elucidate this process, extensive mineralogical, petrophysical and fabric investigations were performed on eight German sandstones in order to obtain more information regarding the weathering process and its dependence on the rock fabric. The analysed sandstones show a wide range of pore size distributions and porosities. A positive correlation with the fabric and the pore space can be found for all studied petrophysical parameters. The intensity of the expansion and related swelling pressure cannot be attributed only to the swelling of clay minerals. The investigations suggest that the micropores and the resulting disjoining pressure during wet/dry cycles also play an important role. The results obtained suggest that the mechanism is related to the presence of liquid water within the porous material.
    Keywords: Sandstone weathering; Moisture expansion; Hygric and hydric wetting; Swelling clay minerals ; 551 ; Earth Sciences; Geology
    Language: English
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  • 7
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    Optimized extraction of dimension stone blocks (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The profitable production of dimension stone mainly depends on the extractable block size. The regularity and volume of the blocks are of critical importance, and are controlled by the three-dimensional pattern of the discontinuity system. Therefore, optimization of block size has to be the aim when quarrying for natural stone. This is mainly connected to the quantification of joints and fractures, i.e., their spacing and orientation. The problem of finding unfractured blocks within arbitrarily oriented and distributed planes can be solved effectively by a numerical algorithm. The main effects of joint orientations on block sizes and shapes will be presented in this article. Quantification of unfractured blocks with the aim of optimization is illustrated by detailed studies on several quarries. The algorithm used in this study can be applied as a powerful tool in the planning of a quarry and the future exploitation of dimension stone. Application of the described approach is demonstrated on practical examples of quarrying natural stones, namely, sandstone, granite, rhyolite, etc. Block quarrying can be optimized by using the new 3D-BlockExpert approach. The quantification of unfractured rock masses is also shown to contribute to a more ecological protection and the sustainable use of natural resources.
    Keywords: Production of dimension stones; Joints and fractures; Block sizes; Optimization ; 551 ; Earth Sciences; Geology
    Language: English
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  • 8
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    Physical weathering of building stones induced by freeze–thaw action: a laboratory long-term study (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Damages to natural building stones induced by the action of frost are considered to be of great importance. Commonly, the frost resistance of building stones is checked by standardised freeze–thaw tests before using. Corresponding tests normally involve 30–50 freeze–thaw action cycles. In order to verify the significance of such measurements, we performed long-term tests on four selected rocks over 1,400 freeze–thaw action cycles. Additionally, numerous petrophysical parameters were analysed to compare the behaviour of rocks in the weathering tests according to the current explanatory models of stress formation by growing ice crystals in the pore space. The long-term tests yield more information about the real frost sensibility of the rocks. A clear deterioration cannot be determined in most cases until 50 weathering cycles have been completed. In the freeze–thaw tests, the samples are also stressed by changing temperature and moisture, indicating that different decay mechanisms can interfere with each other. Thus, thermohygric and moisture expansion are important damage processes.
    Keywords: Freeze–thaw action; Natural building stones; Microfabric; Pore space properties ; 551 ; Earth Sciences; Geology
    Language: English
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  • 9
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    Quality assessment of replacement stones for the Cologne Cathedral: mineralogical and petrophysical requirements (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Owing to its long building history, different types of building stones comprised the construction of the Cologne Cathedral. Severe damage is observed on the different stones, e.g., sandstones, carbonate, and volcanic rocks, especially when the different stone materials neighbor the medieval “Drachenfels trachyte” from the “Siebengebirge”. The question arises, “Is the insufficient compatibility of the implemented building materials causatively related to the strong decay of the Drachenfels trachyte?” The present investigations focus on the petrography and mineralogical composition of eight different stones from the Cologne Cathedral. Petrophysical data, i.e., phase content, moisture and thermal characteristics as well as strength properties are determined and discussed in correlation to each other, showing that not only in terms of lithology great differences exist, but also the petrophysical properties strongly diverge. The ascertained parameters are discussed in view of the deterioration behavior and decay mechanisms of the different stones. To evaluate the compatibility of original, replacement and modern building materials, the properties of the investigated stones are compared to those of Drachenfels trachyte by means of constraints given in the literature. Besides optical properties, petrophysical criteria are also defined as well as strength values. It could be shown that primarily moisture properties, i.e., capillary and sorptive water uptake, water saturation, drying processes and moisture dilatation can be addressed to the deterioration processes.
    Keywords: Stone decay; Cologne Cathedral; Compatibility of building materials; Requirements for replacement stones ; 551 ; Earth Sciences; Geology
    Language: English
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  • 10
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    Traces of the bone-eating annelid Osedax in Oligocene whale teeth and fish bones (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-04-27
    Description: The range of substrates that the bone-eating marine worm Osedax is able to consume has important implications for its evolutionary history, especially its potential link to the rise of whales. Once considered a whale specialist, recent work indicates that Osedax consumes a wide range of vertebrate remains, including whale soft tissue and the bones of mammals, birds and fishes. Traces resembling those produced by living Osedax have now been recognized for the first time in Oligocene whale teeth and fish bones from deep-water strata of the Makah, Pysht and Lincoln Creek formations in western Washington State, USA. The specimens were acid etched from concretions, and details of the borehole morphology were investigated using micro-computed tomography. Together with previously published Osedax traces from this area, our results show that by Oligocene time Osedax was able to colonize the same range of vertebrate remains that it consumes today and had a similar diversity of root morphologies. This supports the view that a generalist ability to exploit vertebrate bones may be an ancestral trait of Osedax.
    Keywords: Deep-sea; Trace fossil; Osedax; Whale; Fish; Micro-CT; Tiefsee; Spurenfossil; Osedax; Wal; Fisch; Micro-CT ; 551 ; Earth Sciences; Paleontology
    Language: English
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  • 11
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    Proximate causes of deforestation in the Bolivian lowlands: an analysis of spatial dynamics (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Forests in lowland Bolivia suffer from severe deforestation caused by different types of agents and land use activities. We identify three major proximate causes of deforestation. The largest share of deforestation is attributable to the expansion of mechanized agriculture, followed by cattle ranching and small-scale agriculture. We utilize a spatially explicit multinomial logit model to analyze the determinants of each of these proximate causes of deforestation between 1992 and 2004. We substantiate the quantitative insights with a qualitative analysis of historical processes that have shaped land use patterns in the Bolivian lowlands to date. Our results suggest that the expansion of mechanized agriculture occurs mainly in response to good access to export markets, fertile soil, and intermediate rainfall conditions. Increases in small-scale agriculture are mainly associated with a humid climate, fertile soil, and proximity to local markets. Forest conversion into pastures for cattle ranching occurs mostly irrespective of environmental determinants and can mainly be explained by access to local markets. Land use restrictions, such as protected areas, seem to prevent the expansion of mechanized agriculture but have little impact on the expansion of small-scale agriculture and cattle ranching. The analysis of future deforestation trends reveals possible hotspots of future expansion for each proximate cause and specifically highlights the possible opening of new frontiers for deforestation due to mechanized agriculture. Whereas the quantitative analysis effectively elucidates the spatial patterns of recent agricultural expansion, the interpretation of long-term historic drivers reveals that the timing and quantity of forest conversion are often triggered by political interventions and historical legacies.
    Keywords: Bolivia; Amazon; Deforestation; Proximate causes; Spatial analysis; Multinomial logistic regression ; 551 ; Environment; Geology; Geography (general); Regional/Spatial Science; Climate Change; Nature Conservation; Oceanography
    Language: English
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  • 12
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    Characeae-derived carbonate deposits in Lake Ganau, Kurdistan Region, Iraq (2018)
    Springer Berlin Heidelberg | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Characeae, a family of calcifying green algae, are common in carbonate-rich freshwaters. The southwestern shoreline of Lake Ganau (Kurdistan Region, northeastern Iraq) harbors dense and thick mats of these algae (genus Chara). On the lake bottom and along the shore, carbonate sands and rocks rich in the remains of stems, branches, nodes, and whorls of Chara are deposited. These deposits show all stages of growth and degradation of characean algae, including replacement and lithification into limestone. The replacement of the fragments by fine-grained calcite preserved delicate microstructures of Chara, such as cortical walls, cell shape, inner and outer layers of the stems, and reproductive organs. Based on roundness, sorting, the degree of lithification, and preserved microstructures of the grains (fragments), three facies were recognized. The first is represented by a newly formed lime sand facies showing elongated grains, poor sorting, and reduced roundness, with pristine preservation of characean surface microstructures. The second is a weathered lime sand facies, which shows better sorting and good roundness, whereas internal structures of characean fragments are still well preserved. The third is comprised of a lithified lime sand facies (grainstone), with very well sorted and rounded grains, and poorly preserved external and internal structures of the characeans. As compared to the newly formed lime sand facies, the grainstone facies shows an increase in grain size by more than 30 %, owing to precipitation of micritic lamina of possible microbial origin. Eventually, the Characeae-derived lime sands are lithified into oolitic limestones with sparry calcite cement, forming a grainstone microfacies. The present study has important implications for the interpretation of pre-Quaternary environments, as it records all stages of the fossilization process of characean green algae and highlights the role of these algae in the formation of oolitic carbonate rocks.
    Keywords: Characeae; Chara; Ooids; Green algae; Carbonate sand; Freshwater carbonates; Facies ; 551 ; Earth Sciences; Sedimentology; Biogeosciences; Geochemistry; Paleontology; Ecology
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  • 13
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    Major shear zones of southern Brazil and Uruguay: escape tectonics in the eastern border of Rio de La plata and Paranapanema cratons during the Western Gondwana amalgamation (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The Mantiqueira Province represents a series of supracrustal segments of the South-American counterpart formed during the Gondwana Supercontinent agglutination. In this crustal domain, the process of escape tectonics played a conspicuous role, generating important NE–N–S-trending lineaments. The oblique component of the motions of the colliding tectonic blocks defined the transpressional character of the main suture zones: Lancinha-Itariri, Cubatão-Arcádia-Areal, Serrinha-Rio Palmital in the Ribeira Belt and Sierra Ballena-Major Gercino in the Dom Feliciano Belt. The process as a whole lasted for ca. 60 Ma, since the initial collision phase until the lateral escape phase predominantly marked by dextral and subordinate sinistral transpressional shear zones. In the Dom Feliciano Belt, southern Brazil and Uruguay, transpressional event at 630–600 Ma is recognized and in the Ribeira Belt, despite less coevally, the transpressional event occurred between 590 and 560 Ma in its northern-central portion and between ca. 625 and 595 Ma in its central-southern portion. The kinematics of several shear zones with simultaneous movement in opposite directions at their terminations is explained by the sinuosity of these lineaments in relation to a predominantly continuous westward compression.
    Keywords: Mantiqueira Province; Gondwana agglutination; Suture zones; Escape tectonics; Metamorphic-deformational events ; 551 ; Earth Sciences; Geophysics/Geodesy; Geology
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  • 14
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    Exhumation and uplift of the Sierras Pampeanas: preliminary implications from K–Ar fault gouge dating and low-T thermochronology in the Sierra de Comechingones (Argentina) (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The Sierras Pampeanas in central and north-western Argentina constitute a distinct morphotectonic feature between 27°S and 33°S. The last stage of uplift and deformation in this area are interpreted to be closely related to the Andean flat-slab subduction of the Nazca plate beneath the South American plate. K–Ar fault gouge dating and low-temperature thermochronology along two transects within the Sierra de Comechingones reveal a minimum age for the onset of brittle deformation about 340 Ma, very low exhumation rates since Late Paleozoic time, as well as a total exhumation of about 2.3 km since the Late Cretaceous. New Ar–Ar ages (7.54–1.91 Ma) of volcanic rocks from the San Luis volcanic belt support the eastward propagation of the flat-slab magmatic front, confirming the onset of flat-slab related deformation in this region at 11.2 Ma. Although low-temperature thermochronology does not clearly constrain the signal of the Andean uplift, it is understood that the current structural relief related to the Comechingones range has been achieved after the exhumation of both fault walls (circa 80–70 Ma).
    Keywords: Sierras Pampeanas; K–Ar dating; Fault gouge dating; Low thermal geochronology; Andean uplift ; 551 ; Earth Sciences; Geophysics/Geodesy; Geology
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  • 15
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    Short-term fluctuations in vegetation and phytoplankton during the Middle Eocene greenhouse climate: a 640-kyr record from the Messel oil shale (Germany) (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The Palaeogene was the most recent greenhouse period on Earth. Especially for the Late Palaeocene and Early Eocene, several superimposed short-term hyperthermal events have been described, including extremes such as the Palaeocene–Eocene Thermal Maximum. Major faunal and floral turnovers in the marine and terrestrial realms were recorded in association with these events. High-resolution palynological analysis of the early Middle Eocene maar lake sediments at Messel, near Darmstadt, Germany, provides an insight into the dynamics of a climax vegetation during the Middle Eocene greenhouse climate in a time span without significant climatic excursions. Numerical techniques like detrended correspondence analysis and wavelet analysis have been applied to recognize cyclic fluctuations and long-term trends in the vegetation through a time interval of approximately 640 kyr. Based on the numerical zoning of the pollen diagram, three phases in the development of the vegetation may be distinguished. Throughout these phases, the climax vegetation did not change substantially in qualitative composition, but a trend towards noticeably less humid conditions probably in combination with a drop of the water level in the lake may be recognized. A shift in algal population from the freshwater dinoflagellate cyst Messelodinium thielepfeifferae to a dominance of Botryococcus in the uppermost part of the core is interpreted as a response to changes in acidity and nutrient availability within the lake. Time series analyses of pollen assemblages show that variations in the Milankovitch range of eccentricity, obliquity and precession can be distinguished. In addition, fluctuations in the sub-Milankovitch range are indicated. This demonstrates that floral changes during steady depositional conditions in the Middle Eocene of Messel were controlled by orbital forcing.
    Keywords: Middle Eocene; Maar lake; Palynology; Climate variability; Milankovitch cycles; Multivariate statistics; Time series analysis ; 551 ; Earth Sciences; Geology; Geophysics/Geodesy
    Language: English
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    Microbial diversity on a marble monument: a case study (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: In the presented case study, ascomycete fungi and green algae on a marble monument were identified by comparisons of the 18S rRNA gene sequences, which were obtained from DNA either from environmental samples or from enrichment cultures. The organisms were found to be responsible for either black or green surface coverings on different areas of the monument surface. Most fungi were related to plant-inhabiting genera, corresponding to a heavy soiling of the marble surface with honeydew. Whereas green algae of the genera Stichococcus, Chloroidium and Apatococcus were found to be dominant in all samples, isolates of two additional genera were recovered only from enrichment cultures. A reference strain of Apatococcus lobatus and an isolate of Prasiolopsis sp. were investigated with respect to putative surface adhesive structures of the cell envelope. The Prasiolopsis cell walls were covered with a thin adhesive exopolysaccharide layer involved in biofilm formation.
    Keywords: Marble monument; Biofilm; Ascomycete fungi; Green algae; Cell wall; Exopolysaccharide ; 551 ; Earth Sciences; Geology
    Language: English
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    Bowing of dimensional granitic stones (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Bowing is a well-known phenomenon seen in marbles used as building veneers. This form of rock weathering occurs as a result of external factors such as temperature, humidity, the system for anchoring the marble slabs or the panel dimensions. Under the same external conditions, many factors will determine the degree of deformation including petrography, thermal properties and residual locked stresses. The usual way to solve the problem of bowed marble slabs is to replace them with other materials, such as granites, in which the deformation still exists but is less common. In this study, eight ornamental granites with different mineralogy, grain size, grain shape, porosity and fabric were tested in a laboratory to assess their susceptibility to bowing. Three slabs of granite, each cut with a different orientation, were studied under different conditions of temperature (90 and 120°C) and water saturation (dry and wet) to investigate the influence of these factors together with that of anisotropy. At 90°C, only the granite with the coarsest grain size and low porosity exhibited deformation under wet conditions. At 120°C and wet conditions, three of the granites showed evident signs of bowing. Again, the granite with the coarsest grain size was the most deformed. It was concluded that the wide grain size distribution influences microcracking more than other expected factors, such as the quartz content of the rock. Also, mineral shape-preferred orientation and porosity play an important role in the bowing of the studied granites.
    Keywords: Granitoids; Bowing; Texture; Thermal expansion ; 551 ; Earth Sciences; Geology
    Language: English
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    Multi-stage emplacement of the Götemar Pluton, SE Sweden: new evidence inferred from field observations and microfabric analysis, including cathodoluminescence microscopy (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The emplacement of the Mesoproterozoic Götemar Pluton into Paleoproterozoic granitoid host rocks of the Transscandinavian Igneous Belt is re-examined by microfabric analysis, including cathodoluminescence microscopy. Field data on the pluton-host rock system are used to strengthen the model. The Götemar Pluton, situated on the Baltic Shield of SE Sweden, is a horizontally zoned tabular structure that was constructed by the intrusion of successive pulses of magma with different crystal/melt ratios, at an estimated crustal depth of 4–8 km. Initial pluton formation involved magma ascent along a vertical dike, which was arrested at a mechanical discontinuity within the granitoid host rocks; this led to the formation of an initial sill. Subsequent sill stacking and their constant inflation resulted in deformation and reheating of existing magma bodies, which also raised the pluton roof. This multi-stage emplacement scenario is indicated by complex dike relationships and the occurrence of several generations of quartz (Si-metasomatism). The sills were charged by different domains of a heterogeneous magma chamber with varying crystal/melt ratios. Ascent or emplacement of magma with a high crystal/melt ratio is indicated by syn-magmatic deformation of phenocrysts. Complex crystallization fabrics (e.g. oscillatory growth zoning caused by high crystal defect density, overgrowth and replacement features, resorbed and corroded crystal cores, rapakivi structure) are mostly related to processes within the main chamber, that is repeated magma mixing or water influx.
    Keywords: Pluton emplacement; Microfabrics; Cathodoluminescence; Mesoproterozoic; Götemar; SE Sweden ; 551 ; Earth Sciences; Geophysics/Geodesy; Geology
    Language: English
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    Provenance of Pleistocene Rhine River Middle Terrace sands between the Swiss–German border and Cologne based on U–Pb detrital zircon ages (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Keywords: Provenance; Heavy minerals; Detrital zircon; U–Pb dating; Rhine River; Alps ; 551 ; Earth Sciences; Geology; Geophysics/Geodesy
    Language: English
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    Localisation and temporal variability of groundwater discharge into the Dead Sea using thermal satellite data (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Keywords: Landsat ETM+; Sea surface temperature; Submarine groundwater discharge; Groundwater resource ; 551 ; Earth Sciences; Geology
    Language: English
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  • 21
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    Dolomitic slates from Uruguay: petrophysical and petromechanical characterization and deposit evaluation (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Slates are internationally known as roof and façade-cladding material since prehistoric times. The methods required to mine and manufacture these dimensional stones are relatively simple in comparison to those utilized in granitic dimensional stones. This has led to a worldwide rentable commercialization of slate in the last centuries and also to the development of characteristic cultural landscapes. In Uruguay several slates are mined and used in architecture, especially as façade cladding and floor slabs. The most important slates regarding their production and utilization are the dolomitic slates. These dolomitic slates are associated with the Neoproterozoic thrust and fold belt of the Dom Feliciano belt. Representative samples have been geochemically and petrographically characterized, as well as petrophysically and petromechanically analyzed. The petrophysical and petromechanical properties were investigated in a very systematic way with respect to the new European standards, showing values comparable to those registered for internationally known slates. Detailed structural and deposit analysis were carried out in Uruguay in order to evaluate the dolomitic slate deposits. The slates are linked to calc-silicate strata in a greenschist facies volcano-sedimentary sequence and the deposits are located in the limb of a regional fold, where bedding and cleavage are parallel. The main lithotype is a layered and fine-grained dolomitic slate with a quite diverse palette of colors: light and dark green, gray, dark gray, reddish and black. The mined slate is split into slabs 0.5–2 cm thick. In the past, the average production in Uruguay was around 4,000 tons/year and a historical maximum of 13,000 tons was reached in 1993 (Oyhantçabal et al. in Z dt Ges Geowiss 158(3):417–428, 2007). The oscillations in the regional demand were the cause of several flourishing and decay cycles in the activity, but our investigation shows a considerable volume of indicated resources and therefore a very good potential.
    Keywords: Slates; Dimensional stones; Petrophysical properties; Petrography; Uruguay ; 551 ; Earth Sciences; Geology
    Language: English
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    Microcracking in calcite and dolomite marble: microstructural influences and effects on properties (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Microstructure‐based finite-element analysis with a microcracking algorithm was used to simulate an actual degradation phenomenon of marble structures, i.e., microcracking. Both microcrack initiation and crack propagation were characterized, as were their dependence on lattice preferred orientation (LPO), grain shape preferred orientation (SPO), grain size, marble composition (calcite and dolomite) and grain‐boundary fracture toughness. Two LPOs were analyzed: a random orientation distribution function and an orientation distribution function with strong directional crystalline texture generated from a March–Dollase distribution. Three SPOs were considered: equiaxed grains; elongated grains and a mixture of equiaxed and elongated grains. Three different grain sizes were considered: fine grains of order 200 μm (only calcitic marble); medium size grains of order 1 mm (calcitic and dolomitic marbles); and large grains of order 2 mm (only dolomitic marble). The fracture surface energy for the grain boundaries, γig, was chosen to be 20 and 40 % of the fracture surface energy of a grain, γxtal, so that both intergranular and transgranular fracture were possible. Studies were performed on these idealized marble microstructures to elucidate the range of microcracking responses. Simulations were performed for both heating and cooling by 50 °C in steps of 1 °C. Microcracking results were correlated with the thermoelastic responses, which are indicators related to degradation. The results indicate that certain combinations of LPO, SPO, grain size, grain‐boundary fracture toughness and marble composition have a significant influence on the thermal-elastic response of marble. Microstructure with the smallest grain size and the highest degree of SPO and LPO had less of a tendency to microcrack. Additionally, with increasing SPO and LPO microcracking becomes more spatially anisotropic. A significant observation for all microstructures was an asymmetry in microcracking upon heating and cooling: more microcracking was observed upon cooling than upon heating. Given an identical microstructure and crystallographic texture, calcite showed larger thermal stresses than dolomite, had an earlier onset of microcracking upon heating and cooling, and a greater microcracked area at a given temperature differential. Thermal expansion coefficients with and without microcracking were also determined.
    Keywords: Marble; Microcracking; Finite-element modeling; Lattice preferred orientation; Shape preferred orientation; Strain energy density; Maximum principal stress; Thermal expansion coefficient; Thermal expansion anisotropy ; 551 ; Earth Sciences; Geology
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    Granitic dimensional stones in Uruguay: evaluation and assessment of potential resources (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: In Uruguay commercial granite varieties comprise mafic rocks, granitoids, and syenitoids. There is a long tradition in Uruguay, as well as worldwide, of using dimensional stones in architecture and art, specially granitic ones. Some of the present applications of these dimensional stones are as façade cladding, countertops, and outdoor and indoor floor slabs. The color spectrum of the Uruguayan granitic dimensional stones varies from black to light gray, covering a wide variety of red and pink and minor greenish-gray. The décor of these granitic dimensional stones is mainly determined by their fabric, fundamentally the grain size and the color distribution between the different minerals that compose the rocks. In the present research the most important commercial granites were sampled to analyze their petrography and petrophysical properties. A detailed structural analysis has been performed in several deposits, as well as the application of the software 3D Block Expert for modeling the possible raw block size distribution. Other factors controlling the mining viability of the deposits were also studied (e.g., homogeneity/heterogeneity of color and décor) and the possible reserves were calculated.
    Keywords: Granitic dimensional stones; Petrophysical properties; Petrography; Deposit characterization; Uruguay ; 551 ; Earth Sciences; Geology
    Language: English
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    Moisture expansion associated to secondary porosity: an example of the Loseros Tuff of Guanajuato, Mexico (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The old mining city of Guanajuato in middle Mexico preserves one of the most important historical legacies in colonial buildings, the UNESCO declared the city World Heritage Site in 1988. Practically all the colonial constructions were built with natural stones from the neighbourhood, of which stands a greenish to reddish vulcanite, called Loseros Tuff. Although the Loseros Tuff is widely used in historical buildings in the city. It shows significant deterioration and weathering effects, principally in the parts where the tuff shows a coarse grain size. The petrographic, petrophysical, mineralogical and geochemical properties of the Loseros Tuff were analysed in order to determine the causes, effects, behaviour and response to deterioration of this volcanic rock. The results of the investigations suggest that in addition to the parameters like the grain size and the porosity properties, the pore radii distribution is decisive for the effectiveness of porosity and the water transport into the rock. It is recognized that once the liquid water invades the rock the dissolution of the matrix occurs, which is accompanied by a sudden moisture expansion favoured by the newly formed secondary porosity and the high content of expandable clay minerals.
    Keywords: Tuff; Moisture expansion; Porosity; Guanajuato ; 551 ; Earth Sciences; Geology
    Language: English
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    Stability assessment of marble statuaries of the Schlossbrücke (Berlin, Germany) based on rock strength measurements and ultrasonic wave velocities (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The degree of weathering in natural stones on buildings and sculptures has been determined for many years in numerous cases by means of ultrasonic measurements. Conclusions concerning the strength of the rock and the type of weathering can thus be drawn. This relationship has not been established for all rock types. Most of the progress utilizing this method has been made in the analysis of marbles, where an increasing degree of weathering shows lower ultrasonic velocities. In the present study, four Carrara marble samples showing similar rock fabrics, but with respect to weathering exhibit considerable differences are investigated. Porosity varies between 0.2 vol. % and ca. 2.4 vol. %, whereby with increasing porosity the pore radii changes as well. Parallel to this the ultrasonic velocities change in dry samples from about 5.5 to 1.6 km/s, respectively. Model calculations reveal that the velocity reduction is caused by cracks with an extremely small aspect ratio of about 0.005 or even less. After a specific loss of strength, however, solution processes can become active, which modify the microcracks and generate an opposite trend. In the process a strong porosity increase correlates to a relatively small velocity reduction. With the presence of water the Vp porosity weathering relationship experiences a considerable modification. Parallel to the reduction of the ultrasonic velocities, it was determined that the mechanical strength (compressive strength, flexural strength, etc.) as well as the static Young’s modulus is reduced almost equally by a progressive advancement of the weathering front. In one case study dealing with tensile strengths, it was clearly documented how tensile cracks develop and propagate in dependence of the rock fabric. The rock mechanical and ultrasonic velocity data were used for stability assessments applied to the marble statuaries from the Schlossbrücke in Berlin. Stability assessments of the sculpture group 4 reveal that some critical parts must be replaced due to safety reasons.
    Keywords: Marble waethering; Mechanical properties; Ultrasonic wave velocites; Stability assessment; Cultural heritage ; 551 ; Earth Sciences; Geology
    Language: English
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    Cambrian sedimentary dykes in the Proterozoic basement of the Västervik area (southeast Sweden): episodic formation inferred from macro- and microfabrics (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Fabrics of Cambrian sedimentary dykes formed in Proterozoic granites of the Västervik area (Southeast Sweden) evidence repeated opening/filling and mineralisation/cementation events under varying conditions. Diagnostic features include (1) wall-parallel boundaries between epiclastic fillings and (2) early formed dyke sediments that appear as lithoclasts in subsequently formed sedimentary fillings. The psammitic components mostly consist of well-rounded quartz grains related to a coastal environment and fragments from the granitic host rock. Platy calcitic fragments embedded in the epiclastic matrix originally formed as microveins within already-lithified dyke sediments and the adjacent host rock. Convex downward-pointing, internal sagging structures, together with the preferred orientation of compositional boundaries and long axes of grains/rock fragments parallel to the dyke walls, are interpreted as the result of suction-controlled flow of unconsolidated fillings during episodes of downward dyke growth. Pressure solution of quartz grains are evidence of extensional phases with dyke propagation that were interrupted by phases of horizontal compression normal to the dyke walls. The N–S and NE–SW striking sedimentary dykes formed by opening of a pre-existing joint set during NW–SE oriented rifting during the Cambrian.
    Keywords: Sedimentary dykes; Proterozoic; Southeast Sweden; Microfabrics; Passive infill; Cambrian geodynamics ; 551 ; Earth Sciences; Geology; Geophysics/Geodesy
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    Weathering of volcanic tuff rocks caused by moisture expansion (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Moisture expansion in natural building stones is considered one of the most important factors affecting their weathering and deterioration. The processes that may be responsible for the expansion under determinate relative humidity (hygric dilatation) and water-saturated conditions (hydric dilatation) are generally attributed to the presence of swellable clay minerals. In contrast to this assumption, our investigations show that moisture expansion also takes place in volcanic tuff building stones almost free from clay minerals. To provide a deeper understanding of the processes, swelling and deterioration were performed on 14 volcanic tuffs used as important building stones of different ages, compositions and weathering stages from Mexico, Germany and Hungary. The investigations undertaken include extensive chemical, petrophysical and fabric analyses. The samples show a wide range of effective porosity, microporosity, capillary water absorption, moisture expansion, and CEC values. High moisture expansion does not seem to depend on clay mineral content alone. We also observed that there is no significant effect on dilatation if clay minerals are present but only form a thin coat on the outer shell of bigger pores. Moreover, we identified a correlation between microporosity, average pore radius and moisture expansion. The investigations highlight the fact that moisture expansion cannot only be attributed to swellable clay minerals, and suggest that the presence and accumulation of micropores and their average radius and distribution play an important role for non-clay associated swelling intensity, which can most probably be attributed to the disjoining pressure.
    Keywords: Weathering of tuffs; Hygric expansion; Hydric expansion; Clay mineralogy; Microporosity; Disjoining pressure ; 551 ; Earth Sciences; Geology
    Language: English
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    Discrimination of TiO2 polymorphs in sedimentary and metamorphic rocks (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Investigation by Raman spectroscopy of samples from different geological settings shows that the occurrence of TiO2 polymorphs other than rutile can hardly be predicted, and furthermore, the occurrence of anatase is more widespread than previously thought. Metamorphic pressure and temperature, together with whole rock chemistry, control the occurrence of anatase, whereas variation of mineral assemblage characteristics and/or fluid occurrence or composition takes influence on anatase trace element characteristics and re-equilibration of relict rutiles. Evaluation of trace element contents obtained by electron microprobe in anatase, brookite, and rutile shows that these vary significantly between the three TiO2 phases. Therefore, on the one hand, an appropriation to source rock type according to Nb and Cr contents, but as well application of thermometry on the basis of Zr contents, would lead to erroneous results if no phase specification is done beforehand. For the elements Cr, V, Fe, and Nb, variation between the polymorphs is systematic and can be used for discrimination on the basis of a linear discriminant analysis. Using phase group means and coefficients of linear discriminants obtained from a compilation of analyses from samples with well-defined phase information together with prior probabilities of groupings from a natural sample compilation, one is able to calculate phase grouping probabilities of any TiO2 analysis containing at least the critical elements Cr, V, Fe, and Nb. An application of this calculation shows that for the appropriation to the phase rutile, a correct-classification rate of 99.5% is obtained. Hence, phase specification by trace elements proves to be a valuable tool besides Raman spectroscopy.
    Keywords: TiO2 polymorph discrimination; Phase classification; Anatase; Brookite; Rutile; Erzgebirge; Zr-in-rutile thermometry ; 551 ; Earth Sciences; Mineral Resources; Mineralogy; Geology
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    The transpressional connection between Dom Feliciano and Kaoko Belts at 580–550 Ma (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: A new U–Pb SHRIMP age of 551 ± 4 Ma on a mylonitic porphyry that intruded into the Sierra Ballena Shear Zone (Southernmost Dom Feliciano Belt, Uruguay) and a review of relevant published data make possible a more refined correlation and reconstruction of Brasiliano/Pan-African transpressional events. Paleogeographic reconstruction, kinematics and timing of events indicate a connection between the shear systems of the Dom Feliciano and Kaoko Belts at 580–550 Ma. Sinistral transpression recorded in shear zones accommodates deformation subsequent to collision between the Congo and Río de la Plata Cratons. The correlation is strengthened by the similarity of magmatic and metamorphic ages in the Coastal Terrane of the Kaoko Belt and the Punta del Este Terrane of the Dom Feliciano Belt. This post-collisional sinistral transpression brought these units near to their final position in Gondwana and explains the different evolution at 550–530 Ma. While in the Kaoko Belt, an extensional episode resulted in exhumation as a consequence of collision in the Damara Belt, in the Dom Feliciano Belt, sinistral transpression occurred associated with the closure of the southern Adamastor Ocean due to Kalahari-Río de la Plata collision.
    Keywords: Dom Feliciano Belt; Kaoko Belt; Brasiliano; Pan-African; Transpressional deformation; Shear Zones ; 551 ; Earth Sciences; Geophysics/Geodesy; Geology
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    Geodynamic evolution of the Eastern Sierras Pampeanas (Central Argentina) based on geochemical, Sm–Nd, Pb–Pb and SHRIMP data (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Keywords: Eastern Sierras Pampeanas; Provenance; Tectonic setting; Gondwana margin; Geodynamic evolution ; 551 ; Earth Sciences; Geophysics/Geodesy; Geology
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    Zircon texture and chemical composition as a guide to magmatic processes and mixing in a granitic environment and coeval volcanic system (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: This study documents the chemical and textural responses of zircon in the Elba igneous complex, with particular reference to the 7- to 7.8-Ma-old Monte Capanne pluton in relation to its coeval volcanic counterpart (Capraia), using BSE imaging and quantitative electron microprobe analyses. The Monte Capanne pluton displays multiple field and geochemical evidence for magma mixing. The samples we have investigated (including monzogranitic, mafic enclave and dyke samples) display similar zircon textures and are associated with an extremely large range of trace and minor element (Hf, Y, HREE, Th, U) compositions, which contrast with relatively simple textures and zoning patterns in zircons from a Capraia dacite. We have used a relatively simple textural classification (patchy zoning, homogenous cores, oscillatory zoning and unzoned zircon) as the basis for discussing the chemical composition and chemical variation within zircons from the Monte Capanne pluton. Based on these data and other works (Dini et al. 2004 in Lithos 78:101–118, 2004) , it is inferred that mixing between metaluminous and peraluminous melts occurred early in the evolution of the Monte Capanne magma chamber. In particular, mixing was responsible for the development of the patchy-zoning texture in the zircon cores, which was associated with reactions between other accessory phases (including monazite, apatite, allanite), which we infer to have significantly affected the Th distribution in zircon. Zircons from the MC pluton displaying “homogeneous cores” have chemical affinities with zircons in the coeval Capraia volcanic system, consistent with the participation of a Capraia-like mantle end-member during mixing. Further zircon growth in the MC pluton produced the oscillatory zoning texture, which records both long-term (crystal fractionation) and transient (recharge with both silicic and mafic magmas) events in a hybrid magma chamber. It is inferred that Hf and the Th/U ratio cannot be used alone to infer magmatic processes due to their dependency on temperature, nor are they a diagnostic feature of xenocrystic grains. This study shows that zircon chemistry coupled with detailed textural analysis can provide a powerful tool to elucidate the complex evolution of a magma system.
    Keywords: Granite petrology; Zircon; Elba; Capraia; Electron microprobe; Magma mixing ; 551 ; Earth Sciences; Mineralogy ; Mineral Resources ; Geology
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    The bowing potential of granitic rocks: rock fabrics, thermal properties and residual strain (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The bowing of natural stone panels is especially known for marble slabs. The bowing of granite is mainly known from tombstones in subtropical humid climate. Field inspections in combination with laboratory investigations with respect to the thermal expansion and the bowing potential was performed on two different granitoids (Cezlak granodiorite and Flossenbürg granite) which differ in the composition and rock fabrics. In addition, to describe and explain the effect of bowing of granitoid facade panels, neutron time-of-flight diffraction was applied to determine residual macro- and microstrain. The measurements were combined with investigations of the crystallographic preferred orientation of quartz and biotite. Both samples show a significant bowing as a function of panel thickness and destination temperature. In comparison to marbles the effect of bowing is more pronounced in granitoids at temperatures of 120°C. The bowing as well as the thermal expansion of the Cezlak sample is also anisotropic with respect to the rock fabrics. A quantitative estimate was performed based on the observed textures. The effect of the locked-in stresses may also have a control on the bowing together with the thermal stresses related to the different volume expansion of the rock-forming minerals.
    Keywords: Granitoids; Bowing; Residual strain; Texture; Thermal expansion ; 551 ; Geosciences; Geology
    Language: English
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    Nd–Sr–Hf–O isotope provinciality in the northernmost Arabian–Nubian Shield: implications for crustal evolution (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Multi-isotope study including whole-rock Nd–Sr, single zircon Hf, and SIMS δ18O analyses of zircons sheds light on magma sources in the northernmost Arabian–Nubian Shield (ANS) during ~820–570 Ma. Reconnaissance initial Nd and Sr isotope data for the older rocks (~820–740 Ma) reaffirms previous estimates that early crustal evolution in this part of the shield involved some crustal contamination by pre-ANS material. Prominent isotope provinciality is displayed by post-collisional calc-alkaline and alkaline igneous rocks of ~635–570 Ma across a NW-SE transect across basement of the Sinai Peninsula (Egypt) and southern Israel. Silicic rocks of the NW-region are characterized by lower εNd(T)–εHf(T) and higher Sri and δ18O compared with rocks of the SE-region, and the transition between the regions is gradual. Within each region isotope ratios are independent of the extent of magma fractionation, and zircon cores and rims yield similar δ18O values. Comparison with southern segments of the ANS shows that the source for most ~635–570 Ma rocks can be modeled as the isotopically aged lower-intermediate crust in the ANS core (SE-region) and its northern, more contaminated ANS margins (NW-region). Nevertheless, Nd–Sr isotope enrichment of the lithospheric mantle is indicated by some basic magmas of the NW-region displaying the most enriched Nd–Sr isotope compositions. Comparison of Nd and Hf depleted mantle model ages for rocks of the SE-region may indicate that crustal formation events in the ANS geographical core took place at 1.1–1.2 Ga and were followed by crustal differentiation starting at ~0.9 Ga.
    Keywords: Nd–Sr–Hf–O; Arabian–Nubian Shield; Magma-sources; Zircon ; 551 ; Earth Sciences; Mineralogy ; Mineral Resources ; Geology
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    The replacement of plagioclase feldspars by albite: observations from hydrothermal experiments (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Oligoclase and labradorite crystals have been experimentally replaced by albite in an aqueous sodium silicate solution at 600°C and 2 kbars. The replacement is pseudomorphic and is characterised by a sharp chemical interface which progresses through the feldspar while preserving the crystallographic orientation. Reaction rims of albite, up to 50 μm thick, can be readily achieved within 14 days. Re-equilibration of plagioclase in an 18O-enriched sodium- and silica-bearing solution results in oxygen isotope redistribution within the feldspar framework structure. The observed characteristics of the reaction products are similar to naturally albitised plagioclase and are indicative of an interface-coupled dissolution–reprecipitation mechanism. Chemical analyses demonstrate that the albitisation is accompanied by the mobilisation of major, minor and trace elements also including elements such as Al and Ti which are commonly regarded as immobile during hydrothermal alteration. The results contribute to developing our understanding of the close association between large-scale albitisation and secondary ore mineralisation which is common in nature.
    Keywords: Plagioclase albitisation; Fluid–mineral interaction; Interface-coupled dissolution–reprecipitation; Hydrothermal experiments; Element mobility ; 551 ; Earth Sciences; Mineralogy ; Mineral Resources ; Geology
    Language: English
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    The tectonic significance of K/Ar illite fine-fraction ages from the San Luis Formation (Eastern Sierras Pampeanas, Argentina) (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The Sierra de San Luis forms the southern tip of the Eastern Sierras Pampeanas in central Argentina. Two narrow belts of low-grade phyllites and quartz arenites, i.e. the San Luis Formation, have accommodated part of the strain-related differential exhumation of the medium- to high-grade metamorphic domains that constitute to the basement complex of the sierra. Eleven phyllite samples were subjected to the K/Ar fine-fraction dating technique. Results are interpreted in relation to the Kübler index of the illites, which indicate epimetamorphic conditions for the majority of the samples. Obtained ages between 330 and 290 Ma cover a period of compressional tectonics in the late Mississippian (Visean/Serpukhovian boundary) followed by the subsidence during the formation of the Paganzo Basin in the provinces of La Rioja and San Luis. These tectonic movements are coincident with the Toco orogeny in northern Chile and southern Bolivia. This suggests that the older K/Ar ages document the compressional stage and that younger ages record the cooling of the basement during the subsequent extensional uplift of the basement.
    Keywords: Eastern Sierras Pampeanas; San Luis Formation; Paganzo Basin; K/Ar; Illite fine fractions ; 551 ; Earth Sciences; Geophysics/Geodesy; Geology
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    The Río de la Plata Craton: a review of units, boundaries, ages and isotopic signature (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: A review of the lithostratigraphic units in the Río de la Plata Craton and of new and previously published geochronological, isotopic and geophysical data is presented. Sm–Nd TDM model ages between 2.6 and 2.2 Ga characterize the Piedra Alta Terrane of this craton. Crystallization ages between 2.2 and 2.1 Ga for the metamorphic protoliths and 2.1–2.0 Ga for the post-orogenic granitoids indicate juvenile crust, followed by a short period of crustal recycling. Cratonization of this terrane occurred during the late Paleoproterozoic. Younger overprinting is not observed, suggesting it had a thick and strong lithosphere in the Neoproterozoic. A similar scenario is indicated for the Tandilia Belt of Argentina. Sm–Nd TDM model ages for the Nico Pérez Terrane show two main events of crustal growth (3.0–2.6 and 2.3–1.6 Ga). The crystallization ages on zircon ranges between 3.1 and 0.57 Ga, which is evidence for long-lived crustal reworking. The age for cratonization is still uncertain. In the Taquarembó Block, which is considered the prolongation of the Nico Pérez Terrane in southern Brazil, a similar scenario can be observed. These differences together with contrasting geophysical signatures support the redefinition of the Río de la Plata Craton comprising only the Piedra Alta Terrane and the Tandilia Belt. The Sarandí del Yí Shear Zone is regarded as the eastern margin of this Craton.
    Keywords: Precambrian; Transamazonian cycle; South American platform; Río de la Plata Craton ; 551 ; Earth Sciences; Geophysics/Geodesy; Geology
    Language: English
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    Micro-framework reconstruction from peloidal-dominated mud mounds (Viséan, SW Spain) (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Keywords: Mud mound; Peloids; Automicrites; Micro-framework; Carboniferous; Spain ; 551 ; Earth Sciences; Ecology; Paleontology; Geochemistry ; Biogeosciences; Sedimentology
    Language: English
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    Magma chamber evolution prior to the Campanian Ignimbrite and Neapolitan Yellow Tuff eruptions (Campi Flegrei, Italy) (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Keywords: Campi Flegrei; Phlegraean fields; Campanian Ignimbrite; Neapolitan Yellow Tuff; Geochemistry; Sr and Nd isotopes; Magma batches; Precursor activity ; 551 ; Geosciences; Sedimentology ; Mineralogy ; Geophysics/Geodesy ; Geology
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    Petrology, magnetostratigraphy and geochronology of the Miocene volcaniclastic Tepoztlán Formation: implications for the initiation of the Transmexican Volcanic Belt (Central Mexico) (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The volcaniclastic Tepoztlán Formation (TF) represents an important rock record to unravel the early evolution of the Transmexican Volcanic Belt (TMVB). Here, a depositional model together with a chronostratigraphy of this Formation is presented, based on detailed field observations together with new geochronological, paleomagnetic, and petrological data. The TF consists predominantly of deposits from pyroclastic density currents and extensive epiclastic products such as tuffaceous sandstones, conglomerates and breccias, originating from fluvial and mass flow processes, respectively. Within these sediments fall deposits and lavas are sparsely intercalated. The clastic material is almost exclusively of volcanic origin, ranging in composition from andesite to rhyolite. Thick gravity-driven deposits and large-scale alluvial fan environments document the buildup of steep volcanic edifices. K-Ar and Ar-Ar dates, in addition to eight magnetostratigraphic sections and lithological correlations served to construct a chronostratigraphy for the entire Tepoztlán Formation. Correlation of the 577 m composite magnetostratigraphic section with the Cande and Kent (1995) Geomagnetic Polarity Time Scale (GPTS) suggests that this section represents the time intervall 22.8–18.8 Ma (6Bn.1n-5Er; Aquitanian-Burdigalian, Lower Miocene). This correlation implies a deposition of the TF predating the extensive effusive activity in the TMVB at 12 Ma and is therefore interpreted to represent its initial phase with predominantly explosive activity. Additionally, three subdivisions of the TF were established, according to the dominant mode of deposition: (1) the fluvial dominated Malinalco Member (22.8–22.2 Ma), (2) the volcanic dominated San Andrés Member (22.2–21.3 Ma) and (3) the mass flow dominated Tepozteco Member (21.3–18.8 Ma).
    Keywords: Magnetostratigraphy; K-Ar Geochronology; Volcaniclastics; Miocene; Tepoztlán Formation; Transmexican Volcanic Belt; Central Mexico ; 551 ; Earth Sciences; Sedimentology; Mineralogy; Geophysics/Geodesy; Geology
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    The Sierra Ballena Shear Zone in the southernmost Dom Feliciano Belt (Uruguay): evolution, kinematics, and deformation conditions (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The Sierra Ballena Shear Zone (SBSZ) is part of a high-strain transcurrent system that divides the Neoproterozoic Dom Feliciano Belt of South America into two different domains. The basement on both sides of the SBSZ shows a deformation stage preceding that of the transcurrent deformation recognized as a high temperature mylonitic foliation associated with migmatization. Grain boundary migration and fluid-assisted grain boundary diffusion enhanced by partial melting were the main deformation mechanisms associated with this foliation. Age estimate of this episode is 〉658 Ma. The second stage corresponds to the start of transpressional deformation and the nucleation and development of the SBSZ. During this stage, pure shear dominates the deformation, and is characterized by the development of conjugate dextral and sinistral shear zones and the emplacement of syntectonic granites. This event dates to 658–600 Ma based on the age of these intrusions. The third stage was a second transpressional event at about 586 to 〈560 Ma that was associated with the emplacement of porphyry dikes and granites that show evidence of flattening. Deformation in the SBSZ took place, during the late stages, under regional low-grade conditions, as indicated by the metamorphic paragenesis in the supracrustals of the country rocks. Granitic mylonites show plastic deformation of quartz and brittle behavior of feldspar. A transition from magmatic to solid-state microstructures is also frequently observed in syntectonic granites. Mylonitic porphyries and quartz mylonites resulted from the deformation of alkaline porphyries and quartz veins emplaced in the shear zone. Quartz veins reflect the release of silica associated with the breakdown of feldspar to white mica during the evolution of the granitic mylonites to phyllonites, which resulted in shear zone weakening. Quartz microstructures characteristic of the transition between regime 2 and regime 3, grain boundary migration and incipient recrystallization in feldspar indicate deformation under lower amphibolite to upper greenschist conditions (550–400°C). On the other hand, the mylonitic porphyries display evidence of feldspar recrystallization suggesting magmatic or high-T solid-state deformation during cooling of the dikes.
    Keywords: Brasiliano; Pan-African; Shear zone; Dom Feliciano Belt; Uruguay; Kinematic analysis ; 551 ; Earth Sciences; Geology ; Geophysics/Geodesy
    Language: English
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    Age constraints on faulting and fault reactivation: a multi-chronological approach (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: Movement within the Earth’s upper crust is commonly accommodated by faults or shear zones, ranging in scale from micro-displacements to regional tectonic lineaments. Since faults are active on different time scales and can be repeatedly reactivated, their displacement chronology is difficult to reconstruct. This study represents a multi-geochronological approach to unravel the evolution of an intracontinental fault zone locality along the Danube Fault, central Europe. At the investigated fault locality, ancient motion has produced a cataclastic deformation zone in which the cataclastic material was subjected to hydrothermal alteration and K-feldspar was almost completely replaced by illite and other phyllosilicates. Five different geochronological techniques (zircon Pb-evaporation, K–Ar and Rb–Sr illite, apatite fission track and fluorite (U-Th)/He) have been applied to explore the temporal fault activity. The upper time limit for initiation of faulting is constrained by the crystallization age of the primary rock type (known as “Kristallgranit”) at 325 ± 7 Ma, whereas the K–Ar and Rb–Sr ages of two illite fractions 〈2 μm (266–255 Ma) are interpreted to date fluid infiltration events during the final stage of the cataclastic deformation period. During this time, the “Kristallgranit” was already at or near the Earth’s surface as indicated by the sedimentary record and thermal modelling results of apatite fission track data. (U–Th)/He thermochronology of two single fluorite grains from a fluorite–quartz vein within the fault zone yield Cretaceous ages that clearly postdate their Late-Variscan mineralization age. We propose that later reactivation of the fault caused loss of helium in the fluorites. This assertion is supported by geological evidence, i.e. offsets of Jurassic and Cretaceous sediments along the fault and apatite fission track thermal modelling results are consistent with the prevalence of elevated temperatures (50–80°C) in the fault zone during the Cretaceous.
    Keywords: Argillic alteration; Fault zone; K–Ar illite; Apatite fission track; (U–Th)/He thermochronology ; 551 ; Earth Sciences; Geology ; Geophysics/Geodesy
    Language: English
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    Community forestry management and livelihood development in northwest China: integration of governance, project design, and community participation (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Keywords: Community-based co-management; Community forestry; Livelihood; Governance; Policy; Mechanism; Participation ; 551 ; Environment; Climate Change; Geology; Oceanography; Geography (general); Regional/Spatial Science; Nature Conservation
    Language: English
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    Time constraints on the tectonic evolution of the Eastern Sierras Pampeanas (Central Argentina) (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The application of the SHRIMP U/Pb dating technique to zircon and monazite of different rock types of the Sierras de Córdoba provides an important insight into the metamorphic history of the basement domains. Additional constraints on the Pampean metamorphic episode were gained by Pb/Pb stepwise leaching (PbSL) experiments on two titanite and garnet separates. Results indicate that the metamorphic history recorded by Crd-free gneisses (M2) started in the latest Neoproterozoic/earliest Cambrian (553 and 543 Ma) followed by the M4 metamorphism at ~530 Ma that is documented in the diatexites. Zircon ages of 492 Ma in the San Carlos Massif correlate partly with rather low Th/U ratios (〈0.1) suggesting their growth by metamorphic fluids. This age is even younger than the PbSL titanite ages of 506 Ma. It is suggested that the fluid alteration relates to the beginning of the Famatinien metamorphic cycle in the neighbouring Sierra de San Luis and has not affected the titanite ages. The PTt evolution can be correlated with the plate tectonic processes responsible for the formation of the Pampean orogene, i.e., the accretion of the Pampean basement to the Río de La Plata craton (M2) and the later collision of the Western Pampean basement with the Pampean basement.
    Keywords: Eastern Sierras Pampeanas; Sierras de Córdoba; Pampean and Famatinian cycles; Geodynamic evolution; SHRIMP dating; Titanite and Garnet Pb–Pb step-wise leaching ; 551 ; Earth Sciences; Geology ; Geophysics/Geodesy
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    The oldest synallactid sea cucumber (Echinodermata: Holothuroidea: Aspidochirotida) (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-04-25
    Description: Aspidochirote holothurian ossicles were discovered in Upper Ordovician-aged Öjlemyr cherts from Gotland, Sweden. The well-preserved material allows definitive assignment to the family Synallactidae, a deep-sea sea cucumber group that is distributed worldwide today. The new taxon Tribrachiodemas ordovicicus gen. et sp. nov. is described, representing the oldest member of the Aspidochirotida. The further fossil record of Synallactidae and evolutionary implications are also discussed.
    Keywords: Echinodermata; Holothuroidea; Ordovician; Sweden; Baltic Sea; Echinodermata; Holothuroidea; Ordovizium; Schweden; Ostsee ; 551 ; Earth Sciences; Paleontology
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    Shear modulus, heat capacity, viscosity and structural relaxation time of Na2O–Al2O3–SiO2 and Na2O–Fe2O3–Al2O3–SiO2 melts (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The configurational heat capacity, shear modulus and shear viscosity of a series of Na2O–Fe2O3–Al2O3–SiO2 melts have been determined as a function of composition. A change in composition dependence of each of the physical properties is observed as Na2O/(Na2O + Al2O3) is decreased, and the peralkaline melts become peraluminous and a new charge-balanced Al-structure appears in the melts. Of special interest are the frequency dependent (1 mHz–1 Hz) measurements of the shear modulus. These forced oscillation measurements determine the lifetimes of Si–O bonds and Na–O bonds in the melt. The lifetime of the Al–O bonds could not, however, be resolved from the mechanical spectrum. Therefore, it appears that the lifetime of Al–O bonds in these melts is similar to that of Si–O bonds with the Al–O relaxation peak being subsumed by the Si–O relaxation peak. The appearance of a new Al-structure in the peraluminous melts also cannot be resolved from the mechanical spectra, although a change in elastic shear modulus is determined as a function of composition. The structural shear-relaxation time of some of these melts is not that which is predicted by the Maxwell equation, but up to 1.5 orders of magnitude faster. Although the configurational heat capacity, density and shear modulus of the melts show a change in trend as a function of composition at the boundary between peralkaline and peraluminous, the deviation in relaxation time from the Maxwell equation occurs in the peralkaline regime. The measured relaxation times for both the very peralkaline melts and the peraluminous melts are identical with the calculated Maxwell relaxation time. As the Maxwell equation was created to describe the timescale of flow of a mono-structure material, a deviation from the prediction would indicate that the structure of the melt is too complex to be described by this simple flow equation. One possibility is that Al-rich channels form and then disappear with decreasing Si/Al, and that the flow is dominated by the lifetime of Si–O bonds in the Al-poor peralkaline melts, and by the lifetime of Al–O bonds in the relatively Si-poor peralkaline and peraluminous melts with a complex flow mechanism occurring in the mid-compositions. This anomalous deviation from the calculated relaxation time appears to be independent of the change in structure expected to occur at the peralkaline/peraluminous boundary due to the lack of charge-balancing cations for the Al-tetrahedra.
    Keywords: Frequency dependent; Shear modulus; Heat capacity; Silicate melts; Relaxation time ; 551 ; Earth Sciences; Mineral Resources ; Geochemistry ; Mineralogy ; Crystallography
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    Geochemical, isotopic and single crystal 40Ar/39Ar age constraints on the evolution of the Cerro Galán ignimbrites (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The giant ignimbrites that erupted from the Cerro Galán caldera complex in the southern Puna of the high Andean plateau are considered to be linked to crustal and mantle melting as a consequence of delamination of gravitationally unstable thickened crust and mantle lithosphere over a steepening subduction zone. Major and trace element analyses of Cerro Galán ignimbrites (68–71% SiO2) that include 75 new analyses can be interpreted as reflecting evolution at three crustal levels. AFC modeling and new fractionation corrected δ18O values from quartz (+7.63–8.85‰) are consistent with the ignimbrite magmas being near 50:50 mixtures of enriched mantle (87Sr/86Sr ~ 0.7055) and crustal melts (87Sr/86Sr near 0.715–0.735). Processes at lower crustal levels are predicated on steep heavy REE patterns (Sm/Yb = 4–7), high Sr contents (〉250 ppm) and very low Nb/Ta (9-5) ratios, which are attributed to amphibolite partial melts mixing with fractionating mantle basalts to produce hybrid melts that rise leaving a gravitationally unstable garnet-bearing residue. Processes at mid crustal levels create large negative Eu anomalies (Eu/Eu* = 0.45–0.70) and variable trace element enrichment in a crystallizing mush zone with a temperature near 800–850°C. The mush zone is repeatedly recharged from depth and partially evacuated into upper crustal magma chambers at times of regional contraction. Crystallinity differences in the ignimbrites are attributed to biotite, zoned plagioclase and other antecrysts entering higher level chambers where variable amounts of near-eutectic crystallization occurs at temperatures as low as 680°C just preceding eruption. 40Ar/39Ar single crystal sanidine weighted mean plateau and isochron ages combined with trace element patterns show that the Galán ignimbrite erupted in more than one batch including a ~ 2.13 Ma intracaldera flow and outflows to the west and north at near 2.09 and 2.06 Ma. Episodic delamination of gravitationally unstable lower crust and mantle lithosphere and injection of basaltic magmas, whose changing chemistry reflects their evolution over a steepening subduction zone, could trigger the eruptions of the Cerro Galán ignimbrites.
    Keywords: Cerro Galán; Puna ignimbrite chemistry; 40Ar/39Ar ages; Delamination; Plateau evolution ; 551 ; Earth Sciences; Sedimentology; Geophysics/Geodesy; Mineralogy; Geology
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    Weathering behaviour and construction suitability of dimension stones from the Drei Gleichen area (Thuringia, Germany) (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: The construction suitability of a dimension stone depends on its weathering properties along with the petrology and the petrophysical properties. The aim of this study was to evaluate the suitability of the dimension stones from the “Drei Gleichen” area for construction and replacement purposes. In total, six sandstones (Ingersleben, Wachsenburg, Hindfelden, Seeberg, Röhnberg, Gleichenberg; Upper Triassic) as well as two carbonates (Wachsenburg sinter; Quaternary, Wandersleben dolomite; Middle Triassic) were analysed. The results from our laboratory and on-site studies of the dimension stones show that rocks from the same stratigraphic layer, like the sandstones from the upper Triassic, can show major differences in their petrophysical and weathering properties. These differences are attributed to their different diagenesis, resulting, e.g. in varying pore space, water balance and strength properties. The pore size distribution can be divided into four different groups based on their occurring maxima and micropore content. The determined water balance properties as well as moisture expansion and salt attack depend on these groups. Next to this, the mineralogical composition significantly influences the weathering resistance. Sandstones with a high content of altered lithoclasts show a high amount of moisture expansion, low strength and, in consequence, a low weathering resistance against salt attack. Based on the results of the present study, an evaluation of construction suitability could be accomplished. From the analysed sandstones, only the Seebergen sandstone is suitable for construction purposes due to its good availability, good strength properties (high compressive and tensile strength, low softening degree) as well as a low porosity. Furthermore, the Wachsenburg sandstone also shows good petrophysical and petrological properties, but exploitable deposits are too sparse to be of commercial interest. From the carbonates, the Wachsenburg sinter shows very suitable rock parameters, but only sparse outcrops occur, which are not appropriate for mining.
    Keywords: Dimension stones; Sandstones; Carbonates; Weathering ; 551 ; Earth Sciences; Geology
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    Monuments under threat: environmental impact, preservation strategies and natural stone recourses (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Keywords: 551 ; Earth Sciences; Geology
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    Natural building stones of Mexico–Tenochtitlán: their use, weathering and rock properties at the Templo Mayor, Palace Heras Soto and the Metropolitan Cathedral (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: In the Aztec period and in colonial times different natural stones originating in the Valley of Mexico were used for building construction. Stone weathering was investigated onsite at various historical buildings within the old quarter of Mexico City. In this study, different aspects of weathering and deterioration at three significant historical buildings will be presented, the Aztec excavation site Templo Mayor, the Metropolitan Cathedral, and the colonial palace of the dukes of Heras Soto. Petrophysical properties of the main building stones of these structures were investigated like density, porosity, pore radii distribution, water uptake rate and coefficient, thermal and hygric expansion, and the mechanical properties of uniaxial compressive strength. A relationship between single critical property values, according to anisotropy fabric characteristics, and specific weathering forms could be deduced.
    Keywords: Stone weathering; Mexico-DF; Petrophysical properties; Isotropy–anisotropy; Critical values ; 551 ; Earth Sciences; Geology
    Language: English
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    Characterizing uranium solubilization under natural near oxic conditions (2018)
    Springer | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Description: A 782 d solubilization study using not shaken batch experiments and involving one uranium-bearing rock and three natural carbonate minerals was conducted to characterize uranium (U) leaching under oxic conditions. Results showed that aqueous U concentration increased continuously with a solubilization rate of 0.16 mgm-2h-1 for the first 564 d (1.5 y). After 1.5 y, U concentration reached a maximum value (saturation) and decreased afterwards. The saturation concentration of 54 mgL-1 (mean value) was influenced to various extent by the presence of carbonate minerals. Dissolution/precipitation, adsorption or ion exchange processes appear to control U solubilization.
    Keywords: 551
    Language: English
    Type: anthologyArticle , acceptedVersion
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    Development of a 3D groundwater model based on scarce data: the Wadi Kafrein catchment/Jordan (2018)
    Springer-Verlag | Berlin/Heidelberg
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    Publication Date: 2021-03-29
    Keywords: Wadi Kafrein; Groundwater modelling; Model calibration; Arid and semiarid areas ; 551 ; Earth Sciences; Geology
    Language: English
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    Vertebrate tracksites in the Obernkirchen Sandstone (late Berriasian, Early Cretaceous) of northwest Germany— their stratigraphical, palaeogeographical, palaeoecological, and historical context (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-04-24
    Description: The northern German Lower Cretaceous Bückeberg Formation yields numerous dinosaur tracksites, some of which have produced material of impressive quality. Stratigraphically, the localities are concentrated in the Obernkirchen Sandstone, a thin subunit within this formation. The Obernkirchen Sandstone represents mainly a sandy barrier to back-barrier and lagoonal setting within a limnic deltaic facies complex, which was deposited during the late Berriasian (Cypridea alta formosa ostracod subzone) in the southeast of the Lower Saxony Basin, northwest Germany. A few tracksites occur more proximally in coeval fluvial deposits. Dinosaur footprint assemblages were left by ornithopods, theropods, sauropods, ankylosaurs, and small, bipedal ornithischians. Other vertebrate tracks are those of turtles and, possibly, crocodilians. Due to the decrease in sandstone quarrying in recent decades, many old tracksites are inaccessible today. Additionally, historical descriptions of the tracks were of highly variable quality and often published in remote and today nearly unobtainable sources. Here we provide a catalogue of 13 tracksites compiled from the literature and some new observations. Of these 13 tracksites, only five are still accessible and currently under study. Descriptions of each locality are provided, with a comprehensive compilation of existing data on lithofacies, stratigraphy, palaeogeography and palaeoecology of the Obernkirchen Sandstone and equivalent strata. A short review of the track-bearing lithofacies assemblage indicates that the outcrop areas have distinctly different facies and environments, and, therefore, track-bearing horizons can only be correlated stratigraphically between adjacent outcrops. For this reason, the identification of a megatracksite in the Obernkirchen Sandstone is currently regarded as premature and uncertain.
    Keywords: Vertebrate tracks; Dinosauria; Cretaceous; Berriasian; Obernkirchen; Münchehagen; Germany; Wirbeltier-Fährten; Dinosauria; Kreide; Berriasium; Obernkirchen; Münchehagen; Deutschland ; 551 ; Earth Sciences; Paleontology
    Language: English
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    Elemental iron (Fe0) for better drinking water in rural areas of developing countries (2018)
    Springer-Verlag Berlin Heidelberg | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: Many of the reasons behind the anthropogenic contamination problems in rural environments of developing countries lie in changes in the traditional way of life and the ignorance on the toxic potential of introduced manufactured products. A generalization trend exists within the international community suggesting that water in developing countries is of poor quality. However, the water quality is rarely analytically determined. Existing potabilization solutions may be prohibitively expensive for the rural populations. Therefore, efficient and affordable technologies are still needed to ameliorate the water quality. In the recent two decades,elemental iron has shown the capacity to remove all possible contaminants (including viruses) from the groundwater. This paper presents a concept to scale down the conventional iron barrier technology to meet the requirements of small communities and households in rural environments worldwide.
    Keywords: 551 ; VJF 000 ; 38.32
    Language: English
    Type: anthologyArticle , acceptedVersion
    Format: 121-130
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    The bipolar bivalve Oxytoma (Palmoxytoma) cygnipes (Young & Bird, 1822) in the Upper Pliensbachian of Germany (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-04-25
    Description: The morphologically conspicuous bivalve Oxytoma (Palmoxytoma) cygnipes (Young & Bird, 1822), known for its palaeogeographically bipolar distribution, from a limestone bed in the boundary “Belemniten–Schichten”/Amaltheenton formation, Lower Jurassic, in N Germany is described. The occurrence of this palaeoceanographically significant bivalve points to an influx of cool seawater from the Arctic to the North-German Basin at the base of the Upper Pliensbachian, just before the deposition of the Amaltheenton formation. A review of previously reported occurrences on the NW European Shelf indicates two distinct stratigraphic intervals of occurrence of this taxon: the Rhaetian–Hettangian boundary and the Upper Pliensbachian. Whereas the former interval of occurrence may be related to short-term cooling in the course of the end-Triassic extinction event, the latter is interpreted as reflecting the influx of a cool water current to the eastern part of the NW European Shelf, which continued southwards parallel to the coast of the Bohemian–Vindelician High.
    Keywords: Bivalvia; Germany; Triassic–Jurassic boundary; Pliensbachian; Boreal; Bivalvia; Deutschland; Trias–Jura-Grenze; Pliensbachium; Boreal ; 551 ; Earth Sciences; Paleontology
    Language: English
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    Ascomycete fungi on dimension stone of the “Burg Gleichen”, Thuringia (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: In the present study, the diversity of ascomycete fungi was investigated on two wall areas of the “Burg Gleichen”, Thuringia (Germany), made of various types of sandstones, travertine and Grenzdolomit. From a W-exposed, shaded wall area, free-living ascomycetes (mainly “black fungi”) and green algae could be retrieved from sandstone lithologies. Sandstone from an ESE-exposed area was mainly colonized by lichen ascomycetes and the lichen alga Trebouxia. Both areas share a small number of generalist species, related to the ascomycete black fungi Sarcinomyces petricola, Phaeococcomyces chersonesos and Stichococcus mirabilis. Free-living black fungi were isolated and characterized with respect to cell wall morphology and melanin content. A remarkably rigid melanin layer, incorporated in the cell wall of a Cladosporium isolate is presented in detail.
    Keywords: Dimension stone; Biofilm; Ascomycete fungi; Green algae; Cell wall; Melanin ; 551 ; Earth Sciences; Geology
    Language: English
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    Influence of shape fabric and crystal texture on marble degradation phenomena: simulations (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: Microstructure-based finite element simulations were used to study the influence of grain shape fabric and crystal texture on thermoelastic responses related to marble degradation phenomena. Calcite was used as an illustrative example for studying extremes of shape preferred orientation (SPO) in shape fabric and lattice preferred orientation (LPO) in crystal texture. Three SPOs were analyzed: equiaxed grains, elongated grains, and a mixture of equiaxed and elongated grains. Three LPOs were considered: a random orientation distribution function and two degrees of strong directional crystal texture. Finally, the correlation between the direction of the LPO with respect to that of the SPO was examined. Results show that certain combinations of SPO, LPO, and their directional relationship have significant influence on the thermomechanical behavior of marble. For instance, while there is no major dependence of the elastic strain energy density and the maximum principal stress on SPO for randomly textured microstructures, there is a strong synergy between LPO and its directional relationship with respect to the SPO direction. Microcracking precursors, elastic strain energy density, and maximum principal stress, decrease when the crystalline c-axes have fiber texture perpendicular to the SPO direction, but increase significantly when the c-axes have fiber texture parallel to the SPO direction. Moreover, the microstructural variability increases dramatically for these latter configurations. In general, the influence of LPO was as expected, namely, the strain energy density and the maximum principal stress decreased with more crystal texture, apart from for the exception noted above. Spatial variations of these precursors indicated regions in the microstructure with a propensity for microcracking. Unexpectedly, important variables were the microstructural standard deviations of the spatial distributions of the microcracking indicators. These microstructural standard deviations were as large as or larger than the variables themselves. The elastic misfit-strain contributions to the coefficients of thermal expansion were also calculated, but their dependence was as expected.
    Keywords: Shape fabric; Shape preferred orientation; Crystal texture; Lattice preferred orientation; Marble; Calcite; Finite element simulations; Thermal expansion anisotropy; Elastic strain energy density; Maximum principal stress; Orientation distribution function; Coefficient of thermal expansion ; 551 ; Earth Sciences; Geology
    Language: English
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    Development and assessment of protective winter covers for marble statuaries of the Schlossbrücke, Berlin (Germany) (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: The present study documents the results of an inter-disciplinary model project that was planned with the aim of developing an innovative winter covering system for marble statuaries located on the Schlossbrücke (Berlin). Such a system would need to fulfil the various requirements for structural stability, aesthetics, climate and practical use. This applied research represents the first complex scientific study of the sustainability of a winter covering system. The study is characterised by the use of complex scientific instruments such as special laboratory analysis and numerical simulation tools. The interaction between the environment and the artefacts in connection with the innovative winter covering structures were studied by extensive climatic monitoring.
    Keywords: Marble sculptures; Marble weathering; Winter cover; Climate data; Numerical simulations ; 551 ; Earth Sciences; Geology
    Language: English
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    CO2 emissions in German, Swedish and Colombian manufacturing industries (2018)
    Springer Berlin Heidelberg | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: This study evaluates and compares the trends in CO2 emissions for the manufacturing industries of three countries: two developed countries (Germany and Sweden) that have applied several measures to promote a shift towards a low-carbon economy and one developing country (Colombia) that has shown substantial improvements in the reduction of CO2 emissions. This analysis is conducted using panel data cointegration techniques to infer causality between CO2 emissions, production factors and energy sources. The results indicate a trend of producing more output with less pollution. The trends for these countries’ CO2 emissions depend on investment levels, energy sources and economic factors. Furthermore, the trends in CO2 emissions indicate that there are emission level differences between the two developed countries and the developing country. Moreover, the study confirms that it is possible to achieve economic growth and sustainable development while reducing greenhouse gas emissions, as Germany and Sweden demonstrate. In the case of Colombia, it is important to encourage a reduction in CO2 emissions through policies that combine technical and economic instruments and incentivise the application of new technologies that promote clean and environmentally friendly processes.
    Keywords: CO2 emissions; Manufacturing industries; Panel data model ; 551 ; Environment; Climate Change; Climate Change Impacts; Oceanography; Geography (general); Regional/Spatial Science; Nature Conservation
    Language: English
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    The effect of air pollution on stone decay: the decay of the Drachenfels trachyte in industrial, urban, and rural environments—a case study of the Cologne, Altenberg and Xanten cathedrals (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: Severe stone deterioration is evident at the Cologne cathedral. In particular, the “Drachenfels” trachyte, which was the building material of the medieval construction period, shows significant structural deterioration as well as massive formation of gypsum crusts. The present article investigates crust formation on limestone, sandstone, and volcanic rock from the Cologne cathedral as well as from the Xanten and Altenberg cathedrals. These three buildings, showing varying degrees of deterioration, are located in different areas and exposed to varying industrial, urban, and rural pollution. Thin laminar and black framboidal crusts form on calcareous as well as silicate stone. The lack of a significant intrinsic calcium and sulfur source for the formation of the gypsum crusts on the Drachenfels trachyte indicates major extrinsic environmental impact: a sufficient offer of SOx from pollutant fluxes as well as external calcium sources (e.g., pollution, mortars, neighboring calcite stones). Chemical analyses reveal strong gypsum enrichment within the crusts as well as higher concentrations of lead and other pollutants (arsenic, antimony, bismuth, tin, etc.), which generally can be linked to traffic and industry. The formation of weathering crusts in an industrial environment is clearly distinguishable from that in rural areas. Scanning electron microscopy observations confirm that the total amount of pollution is less at the Altenberg cathedral than at the Cologne and Xanten cathedrals. XRF analyses show that the formation of gypsum occurs in lower amounts at Altenberg. This correlates well with the measured SO2 content and the intensity of the decay at the different locations. Furthermore, the different types of crusts, e.g., framboidal and laminar, can be differentiated and assigned to the different locations. The black weathering crusts on the silicate Drachenfels trachyte contribute to the degradation of the historic building material. They enhance mechanical moisture-related deterioration processes and the decay by chemical corrosion of rock-forming minerals. Although SO2 concentrations in air have shown a strong decrease over the past 30 years, degradation in connection with weathering crusts is still observed. This indicates that not only contemporary or recent emissions, but also past pollutant concentrations have to be considered.
    Keywords: Cologne cathedral; Xanten cathedral; Altenberg cathedral; Weathering crusts; Pollution impact; Stone decay processes; Drachenfels trachyte ; 551 ; Earth Sciences; Geology
    Language: English
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    Stability assessment of sandstones from the St. Servatius Church in Quedlinburg (UNESCO’s World Heritage Site, Germany) (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: The St. Servatius Church in Quedlinburg (UNESCO’s World Heritage Site, Germany) is characterised by long-standing stability problems and structural damages, which have been known over the last several centuries. The monotonous Cretaceous sandstone with its poor lithification is considered to be the main factor. The sandstone is characterised by a high porosity of around 30 Vol.% (max. ca. 35 Vol.%) and a corresponding high w-value. The porosity and the degree of cementation are responsible for the very low compressive strength of around 8 MPa at maximum, whereas under moisture these values are significantly reduced up to 40%. The freeze–thaw tests indicate a very poor resistance to frost weathering, which may explain the near-surface softening of the sandstone. Direct shear experiments with an approximate 60° angle of friction on the sandstone clearly demonstrate the safety margins. Initial geotechnical modelling does not favour the hypothesis that a landslide of the hill parallel to the southward dipping bedding planes (i.e. shear failure along weak zones) can occur. A prominent clay layer (also with a southward dip) below the entire castle hill is monitored to determine the possible amount of movement with respect to the geological discontinuities (e.g. joints, fractures). At present, a combination of foundation problems are being considered for the stability situation at the church. These include construction deficiencies due to deformation or softening of the foundation of the forerunner churches and missing or faulty connections from building additions. Geological factors responsible for the stability problems include the softening of the sandstone by the influence of weathering and penetrating water as well as the presence of possible shear planes and joints.
    Keywords: Cretaceous sandstone; Lithology; Diagenetic processes; Weathering; Petrophysical properties; Stability assessment ; 551 ; Earth Sciences; Geology
    Language: English
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    Black dimensional stones: geology, technical properties and deposit characterization of the dolerites from Uruguay (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: Dimensional stones with a black color occupy a prominent place on the international market. Uruguayan dolerite dikes of andesitic and andesitic–basaltic composition are mined for commercial blocks of black dimensional stones. A total of 16 dikes of both compositions were studied and samples collected for geochemical and petrographical analysis. Color measurements were performed on different black dimensional stones in order to compare them with the Uruguayan dolerites. Samples of the two commercial varieties (Absolute Black and Moderate Black) were obtained for petrophysical analysis (e.g. density, porosity, uniaxial compressive strength, tensile strength, etc.). Detailed structural analyses were performed in several quarries. Geochemistry and petrography determines the intensity of the black color. The Uruguayan dolerite Absolute Black is the darkest black dimensional stone analyzed in this study. The petrophysical properties of Uruguayan dolerites make them one of the highest quality black dimensional stones. Structural analyses show that five joint sets have been recognized: two sub-vertical joints, one horizontal and two diagonal. These joint sets are one of the most important factors that control the deposits, since they control the block size distribution and the amount of waste material.
    Keywords: Dolerites; Black dimensional stones; Petrophysical properties; Structural analysis; Block size distribution; Uruguay ; 551 ; Earth Sciences; Geology
    Language: English
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    Direct observation of microcrack development in marble caused by thermal weathering (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Description: One of the properties that makes marble such an excellent construction and ornamental material is its low porosity. It is very difficult for water or decay agents to penetrate the internal structure of materials with no or few pores, so enhancing the durability of these materials. However, environmental temperature fluctuations bring about significant physical changes in marbles that result in an increase in porosity, due to the appearance of new microcracks and the expansion of existing ones. These cracks offer new paths into the marble which make it easier for solutions containing pollutants to penetrate the material. Thermal expansion tests were performed on three different types of marble known as White, Tranco, and Yellow Macael (Almeria, Spain), after which an increase in porosity (from 17 to 73% depending on marble type) was observed, mainly due to crack formation. The structural changes occurring during thermal expansion tests were more significant in the case of White Macael samples, a fact that is not only related to its mineralogical composition but also to the morphology of the grains, grain boundaries and crystal size. Our research suggests that thermally weathered White Macael marble could be more susceptible to decay by other contaminant agents than Tranco or Yellow Macael. The use of hot-stage environmental scanning electron microscopy is proposed as a valid tool for observing, both in situ and at high magnification, changes in the fracture system of building stones induced by thermal stress.
    Keywords: Marble; Microcracks; Thermal expansion anisotropy; Grain boundaries ; 551 ; Earth Sciences; Geology
    Language: English
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    Multi-accretional tectonics at the Rio de la Plata Craton margins: preface (2018)
    Springer-Verlag | Berlin/Heidelberg
    Details
    Publication Date: 2021-03-29
    Keywords: 551 ; Earth Sciences; Geophysics/Geodesy; Geology
    Language: English
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  • 64
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    Monograph available for loan
    Applications of paleoenvironmental techniques in estuarine studies (2017)
    Dordrecht : Springer
    Associated volumes
    Details Availability
    Call number: AWI G5-17-90632
    In: Developments in paleoenvironmental research, 20
    Description / Table of Contents: The aim of this edited volume is to introduce the scientific community to paleoenvironmental studies of estuaries, to highlight the types of information that can be obtained from such studies, and to promote the use of paleoenvironmental studies in estuarine management. Readers will learn about the the application of different paleoecological approaches used in estuaries that develop our understanding of their response to natural and human influences. Particular attention is given to the essential steps required for undertaking a paleoecological study, in particular with regard to site selection, core extraction and chronological techniques, followed by the range of indicators that can be used. A series of case studies are discussed in the book to demonstrate how paleoecological studies can be used to address key questions, and to sustainably manage these important coastal environments in the future. This book will appeal to professional scientists interested in estuarine studies and/or paleoenvironmental research, as well as estuarine managers who are interested in the incorporation of paleoenvironmental research into their management programs.
    Type of Medium: Monograph available for loan
    Pages: ix, 700 Seiten , Illustrationen
    ISBN: 978-94-024-0988-8
    Series Statement: Developments in paleoenvironmental research 20
    Language: English
    Note: Contents: 1 Introduction to the Application of Paleoecological Techniques in Estuaries / Kathryn H. Taffs, Krystyna M. Saunders, Kaarina Weckström, Peter A. Gell, and C. Gregory Skilbeck. - PART I ESTARIES AND THEIR MANAGEMENT. - 2 Estuary Form and Function: Implications for Palaeoecological Studies / Peter Scanes, Angus Ferguson, and Jaimie Potts. - 3 Geology and Sedimentary History of Modern Estuaries / C. Gregory Skilbeck, Andrew D. Heap, and Colin D. Woodroffe. - 4 Paleoecological Evidence for Variability and Change in Estuaries: Insights for Management / Krystyna M. Saunders and Peter A. Gell. - PART II CORING AND DATING OF ESTUARINE SEDIMENTS. - 5 Sediment Sampling in Estuaries: Site Selection and Sampling Techniques / C. Gregory Skilbeck, Stacey Trevathan-Tackett, Pemika Apichanangkool, and Peter I. Macreadie. - 6 Some Practical Considerations Regarding the Application of 210Pb and 137Cs Dating to Estuarine Sediments / Thorbjoern Joest Andersen. - 7 Radiocarbon Dating in Estuarine Environments / Jesper Olsen, Philippa Ascough, Bryan C. Lougheed, and Peter Rasmussen. - PART III TECHNIQUES FOR PALAEOENVIRONMENTAL RECONSTRUCTIONS IN ESTUARINES. - 8 Lipid Biomarkers as Organic Geochemical Proxies for the Paleoenvironmental Reconstruction of Estuarine Environments / John K. Volkman and Rienk H. Smittenberg. - 9 C/N ratios and Carbon Isotope Composition of Organic Matter in Estuarine Environments / Melanie J. Leng and Jonathan P. Lewis. - 10 Physical and Chemical Factors to Consider when Studying Historical Contamination and Pollution in Estuaries / Amanda Reichelt-Brushett, Malcolm Clark, and Gavin Birch. - 11 Diatoms as Indicators of Environmental Change in Estuaries / Kathryn H. Taffs, Krystyna M. Saunders, and Brendan Logan. - 12 Dinoflagellate Cysts as Proxies for Holocene Environmental Change in Estuaries: Diversity, Abundance and Morphology / Marianne Ellegaard, Barrie Dale, Kenneth N. Mertens, Vera Pospelova, and Sofia Ribeiro. - 13 Applications of Foraminifera, Testate Amoebae and Tintinnids in Estuarine Palaeoecology / Anupam Ghosh and Helena L. Filipsson. - 14 Ostracods as Recorders of Palaeoenvironmental Change in Estuaries / Jessica M. Reeves. - 15 Application of Molluscan Analyses to the Reconstruction of Past Environmental Conditions in Estuaries / G. Lynn Wingard and Donna Surge. - 16 Corals in Estuarine Environments: Their Response to Environmental Changes and Application in Reconstructing Past Environmental Variability / Francisca Staines-Urías. - 17 Inferring Environmental Change in Estuaries from Plant Macrofossils / John Tibby and Carl D. Sayer. - 18 Applications of Pollen Analysis in Estuarine Systems / Joanna C. Ellison. - PART IV CASE STUDIES. - 19 Palaeo-Environmental Approaches to Reconstructing Sea Level Changes in Estuaries / Brigid V. Morrison and Joanna C. Ellison. - 20 Paleoecology Studies in Chesapeake Bay: A Model System for Understanding Interactions between Climate, Anthropogenic Activities and the Environment / Elizabeth A. Canuel, Grace S. Brush, Thomas M. Cronin, Rowan Lockwood, and Andrew R. Zimmerman. - 21 Paleosalinity Changes in the Río de la Plata Estuary and on the Adjacent Uruguayan Continental Shelf over the Past 1200 Years: An Approach Using Diatoms as a Proxy / Laura Perez, Felipe García-Rodríguez, and Till J.J. Hanebuth. - 22 Application of Paleoecology to Ecosystem Restoration: A Case Study from South Florida’s Estuaries / G. Lynn Wingard. - 23 Paleolimnological History of the Coorong: Identifying the Natural Ecological Character of a Ramsar Wetland in Crisis / Peter A. Gell. - 24 Palaeoenvironmental History of the Baltic Sea: One of the Largest Brackish-water Ecosystems in the World / Kaarina Weckström, Jonathan P. Lewis, Elinor Andrén, Marianne Ellegaard, Peter Rasmussen, and Richard Telford. - Glossary. - Index
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  • 65
    Monograph available for loan
    Monograph available for loan
    Earth's magnetic field : understanding geomagnetic sources from the earth's interior and its environment (2017)
    Dordrecht : Springer
    Associated volumes
    Details Availability
    Call number: 5/M 18.91372
    In: Space sciences series of ISSI
    Description / Table of Contents: This volume provides a comprehensive view on the different sources of the geomagnetic field both in the Earth’s interior and from the field’s interaction with the terrestrial atmosphere and the solar wind. It combines expertise from various relevant areas of geomagnetic and near Earth space research with the aim to better characterise the state and dynamics of Earth’s magnetic field. Advances in the exploitation of geomagnetic observations hold a huge potential not only for an improved quantitative description of the field source but also for a better understanding of the underlying processes and physics. Key is the separation of the field sources in the observations, especially, but not solely, during times of quiet geomagnetic conditions, when the most subtle geomagnetic effects can be identified and become significant. The collected articles are based on the current constellation of ground and space observations, and on state-of-the-art empirical models and physics-based simulations. Thus, it provides an in-depth overview over recent achievements, current limitations and challenges, and future opportunities in the field of geomagnetism and space sciences.
    Type of Medium: Monograph available for loan
    Pages: VII, 626 Seiten , 52 schwarz-weiß Abbildungen, 228 Abbildungen in Farbe
    ISBN: 9789402412246 (hardcover : alk. paper)
    Series Statement: Space sciences series of ISSI 60
    Classification:
    Geomagnetism, Geoelectromagnetism
    Language: English
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  • 66
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    Arctic ice shelves and ice islands (2017)
    Dordrecht : Springer
    Details
    Call number: 9789402411010 (e-book)
    Description / Table of Contents: This book provides an overview of the current state of knowledge of Arctic ice shelves, ice islands and related features. Ice shelves are permanent areas of ice which float on the ocean surface while attached to the coast, and typically occur in very cold environments where perennial sea ice builds up to great thickness, and/or where glaciers flow off the land and are preserved on the ocean surface. These landscape features are relatively poorly studied in the Arctic, yet they are potentially highly sensitive indicators of climate change because they respond to changes in atmospheric, oceanic and glaciological conditions. Recent fracturing and breakup events of ice shelves in the Canadian High Arctic have attracted significant scientific and public attention, and produced large ice islands which may pose a risk to Arctic shipping and offshore infrastructure. Much has been published about Antarctic ice shelves, but to date there has not been a dedicated book about Arctic ice shelves or ice islands. This book fills that gap.
    Type of Medium: 12
    Pages: 1 Online-Ressource (xii, 422 Seiten) , Illustrationen, Diagramme, Karten (teilweise farbig)
    ISBN: 9789402411010 , 978-94-024-1101-0
    ISSN: 2510-0475 , 2510-0483
    Series Statement: Springer Polar Sciences
    URL: Ebook (access only within the AWI network)
    DOI: 10.1007/978-94-024-1101-0
    Language: English
    Note: Contents Part I Distribution and Characteristics of Arctic Ice Shelves 1 Arctic Ice Shelves: An Introduction / Julian A. Dowdeswell and Martin O. Jeffries 2 The Ellesmere Ice Shelves, Nunavut, Canada / Martin O. Jeffries 3 Eurasian Arctic Ice Shelves and Tidewater Ice Margins / Julian A. Dowdeswell 4 Greenland Ice Shelves and Ice Tongues / Niels Reeh Part II Physical Processes and Historical Changes of Arctic Ice Shelves 5 Changes in Canadian Arctic Ice Shelf Extent Since 1906 / Derek Mueller, Luke Copland, and Martin O. Jeffries 6 The Surface Mass Balance of the Ward Hunt Ice Shelf and Ward Hunt Ice Rise, Ellesmere Island, Nunavut, Canada / Carsten Braun 7 Holocene History of Arctic Ice Shelves / John H. England, David J.A. Evans, and Thomas R. Lakeman 8 An Overview of Paleoenvironmental Techniques for the Reconstruction of Past Arctic Ice Shelf Dynamics / Dermot Antoniades 9 Arctic Ice Shelf Ecosystems / Anne D. Jungblut, Derek Mueller, and Warwick F. Vincent Part III Arctic Ice Shelf Calving Processes and Ice Islands 10 Factors Contributing to Recent Arctic Ice Shelf Losses / Luke Copland, Colleen Mortimer, Adrienne White, Miriam Richer McCallum, and Derek Mueller 11 Ice Island Drift Mechanisms in the Canadian High Arctic / Wesley Van Wychen and Luke Copland 12 Recent Changes in Sea Ice Plugs Along the Northern Canadian Arctic Archipelago / Sierra Pope, Luke Copland, and Bea Alt 13 The Military Importance and Use of Ice Islands During the Cold War / William F. Althoff 14 Russian Drifting Stations on Arctic Ice Islands / Igor M. Belkin and Sergey A. Kessel 15 Risk Analysis and Hazards of Ice Islands / Mark Fuglem and Ian Jordaan Erratum Index
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  • 67
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    Biological oceanography of the Baltic Sea (2017)
    Dordrecht : Springer
    Details
    Call number: 9789400706682 (e-book)
    Description / Table of Contents: This is the first comprehensive science-based textbook on the biology and ecology of the Baltic Sea, one of the world’s largest brackish water bodies. The aim of this book is to provide students and other readers with knowledge about the conditions for life in brackish water, the functioning of the Baltic Sea ecosystem and its environmental problems and management. It highlights biological variation along the unique environmental gradients of the brackish Baltic Sea Area (the Baltic Sea, Belt Sea and Kattegat), especially those in salinity and climate. The first part of the book presents the challenges for life processes and ecosystem dynamics that result from the Baltic Sea’s highly variable recent geological history and geographical isolation. The second part explains interactions between organisms and their environment, including biogeochemical cycles, patterns of biodiversity, genetic diversity and evolution, biological invasions and physiological adaptations. In the third part, the subsystems of the Baltic Sea ecosystem - the pelagic zone, the sea ice, the deep soft sea beds, the phytobenthic zone, the sandy coasts, and estuaries and coastal lagoons - are treated in detail with respect to the structure and function of communities and habitats and consequences of natural and anthropogenic constraints, such as climate change, discharges of nutrients and hazardous substances. Finally, the fourth part of the book discusses monitoring and ecosystem-based management to deal with contemporary and emerging threats to the ecosystem’s health.
    Type of Medium: 12
    Pages: 1 Online-Ressource (xxxi, 683 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 9789400706682 , 978-94-007-0668-2
    URL: Ebook (access only within the AWI network)
    DOI: 10.1007/978-94-007-0668-2
    Language: English
    Note: Contents Part I The Baltic Sea environment 1 Brackish water as an environment / Hendrik Schubert, Dirk Schories, Bernd Schneider, and Uwe Selig 2 Why is the Baltic Sea so special to live in? / Pauline Snoeijs-Leijonmalm and Elinor Andrén Part II Ecological processes in the Baltic Sea 3 Biogeochemical cycles / Bernd Schneider, Olaf Dellwig, Karol Kuliński, Anders Omstedt, Falk Pollehne, Gregor Rehder, and Oleg Savchuk 4 Patterns of biodiversity / Pauline Snoeijs-Leijonmalm 5 Biological invasions / Sergej Olenin, Stephan Gollasch, Maiju Lehtiniemi, Mariusz Sapota, and Anastasija Zaiko 6 Genetic diversity and evolution / Risto Väinölä and Kerstin Johannesson 7 Physiological adaptations / Hendrik Schubert, Irena Telesh, Mikko Nikinmaa, and Sergei Skarlato Part III Subsystems of the Baltic Sea ecosystem 8 The pelagic food web / Agneta Andersson, Timo Tamminen, Sirpa Lehtinen, Klaus Jürgens, Matthias Labrenz, and Markku Viitasalo 9 Life associated with Baltic Sea ice / David N. Thomas, Hermanni Kaartokallio, Letizia Tedesco, Markus Majaneva, Jonna Piiparinen, Eeva Eronen-Rasimus, Janne-Markus Rintala, Harri Kuosa, Jaanika Blomster, Jouni Vainio, and Mats A. Granskog 10 Deep soft seabeds / Urszula Janas, Erik Bonsdorff, Jan Warzocha, and Teresa Radziejewska 11 The phytobenthic zone / Hans Kautsky, Georg Martin, and Pauline Snoeijs-Leijonmalm 12 Sandy coasts / Teresa Radziejewska, Jonne Kotta, and Lech Kotwicki 13 Estuaries and coastal lagoons / Hendrik Schubert and Irena Telesh Part IV Monitoring and ecosystem-based management of the Baltic Sea 14 Biological indicators / Michael L. Zettler, Alexander Darr, Matthias Labrenz, Sigrid Sagert, Uwe Selig, Ursula Siebert, and Nardine Stybel 15 Bio-optical water quality assessment / Susanne Kratzer, Piotr Kowalczuk, and Sławomir Sagan 16 Chemical pollution and ecotoxicology / Kari K. Lehtonen, Anders Bignert, Clare Bradshaw, Katja Broeg, and Doris Schiedek 17 Ecosystem health / Maria Laamanen, Samuli Korpinen, Ulla Li Zweifel, and Jesper H. Andersen 18 Ecosystem goods, services and management / Jan Marcin Węsławski, Eugeniusz Andrulewicz, Christoffer Boström, Jan Horbowy, Tomasz Linkowski, Johanna Mattila, Sergej Olenin, Joanna Piwowarczyk, and Krzysztof Skóra Subject index Taxonomy index
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    Sustainable energy systems (2016)
    Dordrecht : Springer
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    Publication Date: 2019-04-01
    Keywords: ddc:600
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: English
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    Sustainability and science policy (2016)
    Dordrecht : Springer
    Details
    Publication Date: 2018-11-19
    Keywords: ddc:300
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: English
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  • 70
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    Resolving the climate change crisis : the ecological economics of climate change (2016)
    Dordrecht : Springer
    Details Availability
    Call number: PIK B 160-19-93122
    Type of Medium: Monograph available for loan
    Pages: XXVII, 628 Seiten , Illustrationen
    ISBN: 9789401775014 , 9789401775021 (electronic)
    URL: http://www.gbv.de/dms/zbw/846199831.pdf
    Language: English
    Note: Contents: Part I. Ecological Economics, Climate Change, and Sustainable Development -- Chapter 1. Ecological Economics and Climate Change -- Chapter 2. Sustainable Development and Climate Change -- Chapter 3. Policies to Achieve Sustainable Development -- Chapter 4. A Sustainable Versus a Growth-As-Usual Scenario -- Part II. Alternative Perspectives of the Climate Change Crisis -- Chapter 5. A Mainstream Economic Perspective of the Climate Change Crisis -- Chapter 6. An Ecological Economic Perspective of the Climate Change Crisis -- Part III. A Way Forward and the Road to Sustainable Development -- Chapter 7. The Case for an Emissions-Trading System to Help Resolve the Climate Change Crisis -- Chapter 8. International Climate Change Institutions and the Greenhouse-Gas Emitting Performance of Nations -- Chapter 9 Laying the Foundations to Support a New Global Climate Change Protocol -- Chapter 10. A Post-2020 Protocol and Emissions-Trading Framework to Resolve the Climate Change Crisis
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  • 71
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    Boreal and temperate trees in a changing climate : modelling the ecophysiology of seasonality (2016)
    Dordrecht : Springer | Dordrecht : Springer Netherlands
    Details
    Call number: PIK N 531-16-89932
    Description / Table of Contents: 1. Climatic Adaptation of Boreal and Temperate Tree Species -- 2. Dynamic Modelling of the Annual Cycle -- 3. The Annual Phenological Cycle -- 4. The Annual Cycle of Photosynthesis in Evergreen Conifers -- 5. The Annual Cycle of Frost Hardiness -- 6. Evolutionary Aspects of the Annual Cycle -- 7. Upscaling to Higher Levels of Organisation -- 8. The Annual Cycle Under Changing Climatic Conditions -- 9. Concluding Remarks
    Description / Table of Contents: This book provides an overview of how boreal and temperate tree species have adapted their annual development cycle to the seasonally varying climatic conditions. Therefore, the frost hardy dormant phase, and the susceptible growth phase, are synchronized with the seasonality of the climate. The volume discusses the annual cycle, including various attributes such as timing of bud burst and other phenological events, seasonality of photosynthetic capacity or the frost hardiness of the trees. During the last few decades dynamic ecophysiological models have been used increasingly in studies of the annual cycle, particularly when projecting the ecological effects of climate change. The main emphasis of this volume is on combining modelling with experimental studies, and on the importance of the biological realism of the models
    Type of Medium: Monograph available for loan
    Pages: XIV, 342 Seiten , Illustrationen
    ISBN: 9789401775496 , 9789401775472
    Series Statement: Biometeorology
    Language: English
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    Trade and finance as cross-cutting issues in the global phosphate and fertilizer market (2015)
    Dordrecht : Springer
    Details
    Publication Date: 2018-11-21
    Keywords: ddc:300
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: English
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    Atmospheric Aerosols : properties and climate impacts (2015)
    Dordrecht : Springer
    Details Availability
    Call number: AWI A11-15-0048
    Description / Table of Contents: This textbook aims to be a one stop shop for those interested in aerosols and their impact on the climate system. It starts with some fundamentals on atmospheric aerosols, atmospheric radiation and cloud physics, then goes into techniques used for in-situ and remote sensing measurements of aerosols, data assimilation, and discusses aerosol-radiation interactions, aersol-cloud interactions and the multiple impacts of aerosols on the climate system. The book aims to engage those interested in aerosols and their impacts on the climate system: graduate and PhD students, but also post-doctorate fellows who are new to the field or would like to broaden their knowledge. The book includes exercises at the end of most chapters. Atmospheric aerosols are small (microscopic) particles in suspension in the atmosphere, which play multiple roles in the climate system. They interact with the energy budget through scattering and absorption of solar and terrestrial radiation. They also serve as cloud condensation and ice nuclei with impacts on the formation, evolution and properties of clouds. Finally aerosols also interact with some biogeochemical cycles. Anthropogenic emissions of aerosols are responsible for a cooling effect that has masked part of the warming due to the increased greenhouse effect since pre-industrial time. Natural aerosols also respond to climate changes as shown by observations of past climates and modelling of the future climate.
    Type of Medium: Monograph available for loan
    Pages: XVII, 311 Seiten , Illustrationen
    ISBN: 9789401796484
    Uniform Title: Aérosols atmosphériques : propriétés et impacts climatiques
    Language: English
    Note: Contents: 1 General Introduction. - 1.1 The Climate System. - 1.2 The Atmosphere. - 1.3 Energy Budget and Atmospheric Composition. - 1.4 The Water Cycle. - 1.5 Aerosols and Climate Change. - 1.6 Outline of this Textbook. - References. - Further Reading (Textbooks and Articles. - 2 Atmospheric Aerosols. - 2.1 Definitions. - 2.2 Sources of Aerosols and Aerosol Precursors. - 2.2.1 Marine Aerosols. - 2.2.2 Desert Dust. - 2.2.3 Volcanic Aerosols. - 2.2.4 Biogenic Aerosols. - 2.2.5 Biomass Burning Aerosols. - 2.2.6 Aerosols from Fossil Fuel Combustion. - 2.3 Spatial and Temporal Aerosol Distributions. - 2.4 Aerosol-Cloud-Radiation Interactions. - 2.5 Climate Effects of Aerosols. - References. - Further Reading (Textbooks and Articles). - 3 Physical, Chemical and Optical Aerosol Properties. - 3.1 Fine, Accumulation and Coarse Modes. - 3.2 Size Distribution. - 3.3 Chemical Composition. - 3.3.1 Aerosol Mixture. - 3.3.2 Inorganic Aerosols. - 3.3.3 Black Carbon Aerosols. - 3.3.4 Organic Aerosols. - 3.3.5 Geographic Distribution of Aerosol Chemical Composition. - 3.4 Refractive Index. - 3.5 Deliquescence, Efflorescence and Hysteresis. - 3.6 Definition of Aerosol Optical Properties. - 3.6.1 Absorption and Scattering Cross Sections. - 3.6.2 Phase Function. - 3.6.3 Upscatter Fractions. - 3.7 Calculation of Aerosol Optical Properties. - 3.7.1 Mie Theory. - 3. 7.2 Extinction, Scattering and Absorption. - 3.7.3 Optical Depth and Angström Coefficient. - 3.8 Optical Properties of Nonspherical Aerosols. - 3.9 Aerosols and Atmospheric Visibility. - References. - Further Reading (Textbooks and Articles). - 4 Aerosol Modelling. - 4.1 Introduction. - 4.2 Emissions. - 4.2.1 Generalities. - 4.2.2 Fossil Fuels, Biofuels, and Other Anthropogenic Sources. - 4.2.3 Vegetation Fires. - 4.2.4 Sea Spray. - 4.2.5 Desert Dust. - 4.2.6 Dimethylsulphide. - 4.2.7 Biogenic Volatile Organic Compounds. - 4.2.8 Volcanoes. - 4.2.9 Resuspension. - 4.3 Atmospheric Processes. - 4.3.1 Nucleation. - 4.3.2 Condensation of Semi-Volatile Compounds. - 4.3.3 Coagulation. - 4.3.4 In-Cloud Aerosol Production. - 4.3.5 Wet Deposition. - 4.3.6 Dry Deposition. - 4.3.7 Sedimentation. - 4.3.8 Aerosol Transport. - 4.4 Modelling Approaches. - 4.4.1 Bulk Approach. - 4.4.2 Sectional Approach. - 4.4.3 Modal Approach. - 4.5 Example: The Sulphur Budget. - References. - Further Reading (Textbooks and Articles). - 5 Interactions of Radiation with Matter and Atmospheric Radiative Transfer. - 5.1 Introduction. - 5.2 Electromagnetic Radiation. - 5.2.1 Generalities. - 5.2.2 Definitions. - 5.3 Interactions of Radiation with Matter. - 5.3.1 Matter, Energy and Spectral Lines. - 5.3.2 Intensity of Spectral Lines. - 5.3.3 Spectral Line Profiles. - 5.3.4 Processes of lnteractions of Radiation with Matter. - 5.4 Modelling of the Interaction Processes. - 5.4.1 Molecular Absorption Coefficient. - 5.4.2 Scattering Phase Function. - 5.4.3 Molecular Scattering. - 5.4.4 Absorption and Scattering by Aerosols. - 5.4.5 Thermal Emission. - 5.5 Atmospheric Radiative Transfer. - 5.5.1 Equation of Radiative Transfer. - 5.5.2 Extinction Only. - 5.5.3 Scattering Medium. - 5.5.4 Plane-Parallel Atmosphere. - 5.5.5 Resolution of the Equation of Radiative Transfer. - 5.6 Absorption Bands, Energy, and Actinic Fluxes. - 5.6.1 Main Molecular Absorption Bands in the Atmosphere. - 5.6.2 Radiative Flux. - 5.6.3 Two-Flux Method. - 5.6.4 Stefan-Boltzmann Law. - 5.6.5 Radiative Budget. - 5.6.6 Actinic Fluxes. - 5.6.7 Polarization of Radiation. - References. - Further Reading (Textbooks and Articles). - 6 In Situ and Remote Sensing Measurements of Aerosols. - 6.1 Introduction to Aerosol Remote Sensing. - 6.2 Passive Remote Sensing: Measurement of the Extinction. - 6.2.1 General Principles. - 6.2.2 Ground-Based Photometry. - 6.2.3 Spaceborne Occultation Measurements. - 6.2.4 Retrieval of Aerosol Size Distribution. - 6.3 Passive Remote Sensing: Measurement of the Scattering. - 6.3.1 General Principles. - 6.3.2 Ground-Based Measurement of Scattered Radiation. - 6.3.3 Spaceborne Measurements of Scattered Radiation. - 6.4 Measurement of Infrared Radiation. - 6.4.1 General Principles. - 6.4.2 Spaceborne Nadir Measurement of Infrared Radiation. - 6.4.3 Spaceborne Limb Measurement of Infrared Radiation. - 6.5 Active Remote Sensing: Lidar. - 6.5.1 General Principles. - 6.5.2 The Lidar Equation. - 6.5.3 Raman Lidar. - 6.6 In Situ Aerosol Measurements. - 6.6.1 Measurement of Aerosol Concentrations. - 6.6.2 Measurement of Aerosol Chemical Composition. - 6.6.3 Measurement of Aerosol Scattering. - 6.6.4 Measurement of Aerosol Absorption. - 6.7 Conclusions. - References. - Further Reading (Textbooks and Articles). - 7 Aerosol Data Assimilation. - 7.1 Introduction. - 7.2 Basic Principles of Data Assimilation. - 7.3 Applications of Data Assimilation for Aerosols. - References. - Further Reading (Textbooks and Articles). - 8 Aerosol-Radiation Interactions. - 8.1 Introduction. - 8.2 Atmospheric Radiative Effects Due to Aerosols. - 8.2.1 Simplified Equation for Scattering Aerosols. - 8.2.2 Simplified Equation for Absorbing Aerosols. - 8.2.3 Radiative Transfer Calculations. - 8.2.4 Global Estimates and Sources of Uncertainty. - 8.3 Rapid Adjustments to Aerosol-Radiation Interactions. - 8.4 Radiative Impact of Aerosols on Surface Snow and Ice. - References. - Further Reading (Textbooks and Articles). - 9 Aerosol-Cloud lnteractions. - 39.1 Introduction. - 9 .1.1 Cloud Formation. - 9 .1.2 Cloud Distribution. - 9 .1.3 Aerosol-Cloud Interactions. - 9.2 Aerosol Effects on Liquid Clouds. - 9 .2.1 Saturation Pressure of Water Vapour. - 9.2.2 Kelvin Effect. - 9.2.3 Raoult's Law. - . - 9.2.4 Köhler Theory. - 9.2.5 Extensions to the Köhler Theory. - 9.2.6 CCN and Supersaturation in the Cloud. - 9.2.7 Dynamical and Radiative Effects in Clouds. - 9.2.8 Principle of the Cloud Albedo Effect. - 9.2.9 Observations of the Cloud Albedo Effect. - 9.2.10 Adjustments in Liquid Water Clouds. - 9.2.11 Rapid Adjustments Occurring in Liquid Clouds. - 9.3 Aerosols Effects on Mixed-Phased and Ice Clouds. - 9.3.1 Elements of Microphysics of Ice Clouds. - 9.3.2 Impact of Anthropogenic Aerosols on Ice Clouds. - 9.4 Forcing Due to Aerosol-Cloud lnteractions. - 9.5 Aerosols, Contrails and Aviation-Induced Cloudiness. - 9.5.1 Formation of Condensation Trails. - 9.5.2 Estimate of the Climate Impact of Contrails. - References. - Further Reading (Textbooks and Articles). - 10 Climate Response to Aerosol Forcings. - 10.1 Introduction. - 10.2 Radiative Forcing, Feedbacks and Climate Response. - 10.2.1 Radiative Forcing. - 10.2.2 Climate Feedbacks. - 10.2.3 Rapid Adjustments and Effective Radiative Forcing. - 10.2.4 Climate Response and Climate Efficacy. - 10.3 Climate Response to Aerosol Forcings. - 10.3.1 Equilibrium Response. - 10.3.2 Past Emissions. - 10.3.3 Detection and Attribution of Aerosol Impacts. - 10.3.4 Future Emissions Scenarios. - 10.4 Nuclear Winter. - References. - Further Reading (Textbooks and Articles). - 11 Biogeochemical Effects and Climate Feedbacks of Aerosols. - 11 .1 Introduction. - 11.2 Impact of Aerosols on Terrestrial Ecosystems. - 11.2.1 Diffuse Radiation and Primary Productivity. - 11.2.2 Aerosols as a Source of Nutrients. - 11.2.3 Acidification of Precipitation. - 11.3 Impact of Aerosols on Marine Ecosystems. - 11.4 Aerosols-Atmospheric Chemistry Interactions. - 11.4.1 Interactions with Tropospheric Chemistry. - 11.4.2 Impact of Stratospheric Aerosols on the Ozone Layer and Ultravialet Radiation. - 11.5 Climate Feedbacks Involving Marine Aerosols. - 11.5.1 Sulphate Aerosols from DMS Emissions. - 11.5.2 Marine Aerosols. - 11.5.3 Other Aerosols of Maritime Origin. - 11.6 Climate Feedbacks Involving Continental Aerosols. - 11.6.1 Secondary Organic Aerosols. - 11.6.2 Primary Aerosols of Biogenic Origin. - 11.6.3 Aerosols from Vegetation Fires. - 11.6.4 Desert Dust. - 11.7 Climate Feedbacks Involving Stratospheric Aerosols. - References. - Further Reading (Textbooks and Articles). - 12 Strato
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    Landscapes and landforms of Namibia (2015)
    Dordrecht : Springer
    Details Availability
    Call number: M 22.94750
    Type of Medium: Monograph available for loan
    Pages: xi, 173 Seiten , Illustrationen
    Edition: Softcover reprint of the hardcover 1st edition
    ISBN: 9789401780193 , 9789402400311
    Series Statement: World geomorphological landscapes
    URL: Inhaltsverzeichnis
    Language: English
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    Life Cycle Management (2015)
    Dordrecht : Springer
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    Keywords: Environment ; Renewable energy resources ; Environmental sciences ; Renewable energy sources ; Alternate energy sources ; Green energy industries ; Environmental management ; Sustainable development ; Environment ; Sustainable Development ; Environmental Management ; Renewable and Green Energy ; Environmental Science and Engineering
    Description / Table of Contents: Part I: Introducing Life Cycle Management --- Introduction: Life Cycle Management --- Life Cycle Management: Implementing Sustainability in Business Practice --- Life Cycle Management as a Way to Operationalize Sustainability Within Organizations --- How to Implement Life Cycle Management in Business? --- Life Cycle Sustainability Assessment: A Tool for Exercising due Diligence in Life Cycle Management --- Life Cycle Management: Labeling, Declarations and Certifications at the Product Level —Different Approaches --- Mainstreaming the Use of Life Cycle Management in Small and Medium Sized Enterprises Using a Sector Based and Regional Approach --- Part II: Advancing the Implementation of Life Cycle Management in Business Practice --- From Projects to Processes to Implement Life Cycle Management in Business --- How to Make the LCA Team a Business Partner --- Sustainability Improvements and Life Cycle Approaches in Industry Partnerships --- Sustainable Value Creation with Life Cycle Management --- Part III: Life Cycle Management as Part of Sustainable Consumption and Production Strategies and Policies --- Hotspots Analysis: Providing the Focus for Action --- From Sustainable Production to Sustainable Consumption.-Life Cycle Management Responsibilities and Procedures in the Value Chain --- Policy Options for Life Cycle Assessment Deployment in Legislation --- Part IV: Mainstreaming and Capacity Building on Life Cycle Management --- Taking Life Cycle Management Mainstream: Integration in Corporate Finance and Accounting --- Building Organizational Capability for Life Cycle Management --- Promoting Life Cycle Thinking, Life Cycle Assessment and Life Cycle Management Within Business in Brazil --- Mainstreaming Life Cycle Sustainability Management in Rapidly Growing and Emerging Economies Through Capacity-building.-Communication and Collaboration as Essential Elements for Mainstreaming Life Cycle Management.-Part V: Implementation and Case Studies of Life Cycle Management in Different Business and Industry Sector --- Exploring Challenges and Opportunities of Life Cycle Management in the Electricity Sector --- Life Cycle Management Applied to Urban Fabric Planning --- Implementing Life Cycle Engineering in Automotive Development as a Helpful Management Tool to Support Design for Environment --- Managing Life cycle Sustainability Aspects in the Automotive Industry --- Life Cycle Management as a Way to Operationalize the Creating Shared Value Concept in the Food and Beverage Industry: A Case Study
    Pages: Online-Ressource (XVII, 353 pages) , 49 illustrations, 28 illustrations in color
    ISBN: 9789401772211
    URL: https://link.springer.com/openurl?genre=book&isbn=978-94-017-7221-1
    Language: English
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    Encyclopedia of Scientific Dating Methods (2015)
    Dordrecht : Springer
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    Keywords: dating methods ; time range
    Description / Table of Contents: This volume provides an overview of (1) the physical and chemical foundations of dating methods and (2) the applications of dating methods in the geological sciences, biology, and archaeology, in almost 200 articles from over 200 international authors. It will serve as the most comprehensive treatise on widely accepted dating methods in the earth sciences and related fields. No other volume has a similar scope, in terms of methods and applications and particularly time range. Dating methods are used to determine the timing and rate of various processes, such as sedimentation (terrestrial and marine), tectonics, volcanism, geomorphological change, cooling rates, crystallization, fluid flow, glaciation, climate change and evolution. The volume includes applications in terrestrial and extraterrestrial settings, the burgeoning field of molecular-clock dating and topics in the intersection of earth sciences with forensics. The content covers a broad range of techniques and applications. All major accepted dating techniques are included, as well as all major datable materials.
    Pages: Online-Ressource (XXVII, 978 Seiten)
    ISBN: 9789400763043
    URL: https://doi.org/10.1007/978-94-007-6304-3
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    Life Cycle Management (2015)
    Dordrecht : Springer
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    Keywords: Environment ; Renewable energy resources ; Environmental sciences ; Renewable energy sources ; Alternate energy sources ; Green energy industries ; Environmental management ; Sustainable development ; Environment ; Sustainable Development ; Environmental Management ; Renewable and Green Energy ; Environmental Science and Engineering
    Description / Table of Contents: Part I: Introducing Life Cycle Management --- Introduction: Life Cycle Management --- Life Cycle Management: Implementing Sustainability in Business Practice --- Life Cycle Management as a Way to Operationalize Sustainability Within Organizations --- How to Implement Life Cycle Management in Business? --- Life Cycle Sustainability Assessment: A Tool for Exercising due Diligence in Life Cycle Management --- Life Cycle Management: Labeling, Declarations and Certifications at the Product Level —Different Approaches --- Mainstreaming the Use of Life Cycle Management in Small and Medium Sized Enterprises Using a Sector Based and Regional Approach --- Part II: Advancing the Implementation of Life Cycle Management in Business Practice --- From Projects to Processes to Implement Life Cycle Management in Business --- How to Make the LCA Team a Business Partner --- Sustainability Improvements and Life Cycle Approaches in Industry Partnerships --- Sustainable Value Creation with Life Cycle Management --- Part III: Life Cycle Management as Part of Sustainable Consumption and Production Strategies and Policies --- Hotspots Analysis: Providing the Focus for Action --- From Sustainable Production to Sustainable Consumption.-Life Cycle Management Responsibilities and Procedures in the Value Chain --- Policy Options for Life Cycle Assessment Deployment in Legislation --- Part IV: Mainstreaming and Capacity Building on Life Cycle Management --- Taking Life Cycle Management Mainstream: Integration in Corporate Finance and Accounting --- Building Organizational Capability for Life Cycle Management --- Promoting Life Cycle Thinking, Life Cycle Assessment and Life Cycle Management Within Business in Brazil --- Mainstreaming Life Cycle Sustainability Management in Rapidly Growing and Emerging Economies Through Capacity-building.-Communication and Collaboration as Essential Elements for Mainstreaming Life Cycle Management.-Part V: Implementation and Case Studies of Life Cycle Management in Different Business and Industry Sector --- Exploring Challenges and Opportunities of Life Cycle Management in the Electricity Sector --- Life Cycle Management Applied to Urban Fabric Planning --- Implementing Life Cycle Engineering in Automotive Development as a Helpful Management Tool to Support Design for Environment --- Managing Life cycle Sustainability Aspects in the Automotive Industry --- Life Cycle Management as a Way to Operationalize the Creating Shared Value Concept in the Food and Beverage Industry: A Case Study
    Pages: Online-Ressource (XVII, 353 pages) , 49 illustrations, 28 illustrations in color
    ISBN: 9789401772211
    URL: https://link.springer.com/openurl?genre=book&isbn=978-94-017-7221-1
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    Linking domestic emissions trading schemes and the evolution of the international regime : bottom-up support of top-down processes? ; Special issue (2009)
    Dordrecht : Springer | Wuppertal : Wuppertal Institut für Klima, Umwelt, Energie
    Details
    Publication Date: 2018-09-20
    Keywords: ddc:320
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: English
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    A first course in Bayesian statistical methods (2009)
    Dordrecht : Springer
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    Call number: AWI S2-18-91494
    Description / Table of Contents: This book provides a compact self-contained introduction to the theory and application of Bayesian statistical methods. The book is accessible to readers having a basic familiarity with probability, yet allows more advanced readers to quickly grasp the principles underlying Bayesian theory and methods. The examples and computer code allow the reader to understand and implement basic Bayesian data analyses using standard statistical models and to extend the standard models to specialized data analysis situations. The book begins with fundamental notions such as probability, exchangeability and Bayes' rule, and ends with modern topics such as variable selection in regression, generalized linear mixed effects models, and semiparametric copula estimation. Numerous examples from the social, biological and physical sciences show how to implement these methodologies in practice. Monte Carlo summaries of posterior distributions play an important role in Bayesian data analysis. The open-source R statistical computing environment provides sufficient functionality to make Monte Carlo estimation very easy for a large number of statistical models and example R-code is provided throughout the text. Much of the example code can be run ``as is'' in R, and essentially all of it can be run after downloading the relevant datasets from the companion website for this book. Peter Hoff is an Associate Professor of Statistics and Biostatistics at the University of Washington. He has developed a variety of Bayesian methods for multivariate data, including covariance and copula estimation, cluster analysis, mixture modeling and social network analysis. He is on the editorial board of the Annals of Applied Statistics.
    Type of Medium: Monograph available for loan
    Pages: IX, 270 Seiten , Illustrationen
    ISBN: 9780387922997 (GB.) , 9780387924076 (electronic)
    Series Statement: Springer texts in statistics
    URL: http://www.gbv.de/dms/ilmenau/toc/592047008.PDF
    Language: English
    Note: Contents: 1 Introduction and examples. - 1.1 Introduction. - 1.2 Why Bayes?. - 1.2.1 Estimating the probability of a rare event. - 1.2.2 Building a predictive model. - 1.3 Where we are going. - 1.4 Discussion and further references. - 2 Belief, probability and exchangeability. - 2.1 Belief functions and probabilities. - 2.2 Events, partitions and Bayes' rule. - 2.3 Independence. - 2.4 Random variables. - 2.4.1 Discrete random variables. - 2.4.2 Continuous random variables. - 2.4.3 Descriptions of distributions. - 2.5 Joint distributions. - 2.6 Independent random variables. - 2.7 Exchangeability. - 2.8 de Finetti's theorem. - 2.9 Discussion and further references. - 3 One-parameter models. - 3.1 The binomial model. - 3.1.1 Inference for exchangeable binary data. - 3.1.2 Confidence regions. - 3.2 The Poisson model. - 3.2.1 Posterior inference . - 3.2.2 Example: Birth rates. - 3.3 Exponential families and conjugate priors. - 3.4 Discussion and further references. - 4 Monte Carlo approximation. - 4.1 The Monte Carlo method. - 4.2 Posterior inference for arbitrary functions. - 4.3 Sampling from predictive distributions. - 4.4 Posterior predictive model checking. - 4.5 Discussion and further references. - 5 The normal model. - 5.1 The normal model. - 5.2 Inference for the mean, conditional on the variance. - 5.3 Joint inference for the mean and variance. - 5.4 Bias, variance and mean squared error. - 5.5 Prior specification based on expectations. - 5.6 The normal model for non-normal data. - 5.7 Discussion and further references. - 6 Posterior approximation with the Gibbs sampler. - 6.1 A semiconjugate prior distribution. - 6.2 Discrete approximations. - 6.3 Sampling from the conditional distributions. - 6.4 Gibbs sampling. - 6.5 General properties of the Gibbs sampler. - 6.6 Introduction to MCMC diagnostics. - 6.7 Discussion and further references. - 7 The multivariate normal model. - 7.1 The multivariate normal density. - 7.2 A semiconjugate prior distribution for the mean. - 7.3 The inverse-Wishart distribution. - 7.4 Gibbs sampling of the mean and covariance. - 7.5 Missing data and imputation. - 7.6 Discussion and further references. - 8 Group comparisons and hierarchical modeling. - 8.1 Comparing two groups. - 8.2 Comparing multiple groups. - 8.2.1 Exchangeability and hierarchical models. - 8.3 The hierarchical normal model. - 8.3.1 Posterior inference. - 8.4 Example: Math scores in U.S. public schools. - 8.4.1 Prior distributions and posterior approximation. - 8.4.2 Posterior summaries and shrinkage. - 8.5 Hierarchical modeling of means and variances. - 8.5.1 Analysis of math score data. - 8.6 Discussion and further references. - 9 Linear regression. - 9.1 The linear regression model. - 9.1.1 Least squares estimation for the oxygen uptake data. - 9.2 Bayesian estimation for a regression model. - 9.2.1 A semiconjugate prior distribution. - 9.2.2 Default and weakly informative prior distributions. - 9.3 Model selection. - 9.3.1 Bayesian model comparison. - 9.3.2 Gibbs sampling and model averaging. - 9.4 Discussion and further references. - 10 Nonconjugate priors and Metropolis-Hastings algorithms. - 10.1 Generalized linear models. - 10.2 The Metropolis algorithm. - 10.3 The Metropolis algorithm for Poisson regression. - 10.4 Metropolis, Metropolis-Hastings and Gibbs. - 10.4.1 The Metropolis-Hastings algorithm. - 10.4.2 Why does the Metropolis-Hastings algorithm work?. - 10.5 Combining the Metropolis and Gibbs algorithms. - 10.5.1 A regression model with correlated errors. - 10.5.2 Analysis of the ice core data. -
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    Mathematical methods for financial markets (2009)
    Dordrecht : Springer
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    Call number: PIK B 020-20-94151
    Type of Medium: Monograph available for loan
    Pages: XXV, 732 Seiten
    ISBN: 9781852333768 , 9781447125242
    Series Statement: Springer Finance
    Language: English
    Note: Contents: Continuous Path Processes ; Continuous-Path Random Processes: Mathematical Prerequisites ; Basic Concepts and Examples in Finance ; Hitting Times: A Mix of Mathematics and Finance ; Complements on Brownian Motion ; Complements on Continuous Path Processes ; A Special Family of Diffusions: Bessel Processes ; Jump Processes ; Default Risk: An Enlargement of Filtration Approach ; Poisson Processes and Ruin Theory ; General Processes: Mathematical Facts ; Mixed Processes ; Lévy Processes
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    Encyclopedia of Paleoclimatology and Ancient Environments (2009)
    Dordrecht : Springer
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    Keywords: climate change ; paleoceanography ; paleoclimates ; pre-quaternary climates ; quaternary climates
    Description / Table of Contents: Concern exists over human-generated increases in atmospheric greenhouse gases and their potential consequences to society. The Intergovernmental Panel on Climate Change (IPCC) in 2007 finds that global temperatures have increased by 0.8ºC since 1850 and that climate warming is now ’unequivocal’. While the human imprint is becoming increasingly apparent, Earth’s climate has shifted dramatically and frequently during the last few million years, alternating between ice ages, when vast glaciers covered Northern Europe and much of North America, and interglacials—warm periods much like today. Farther back in geologic time, climates have differed even more from the present. Thus, to fully understand the unusual changes of the 20th century and possible future trends, these must be placed in a longer-term context extending beyond the period of instrumental records. The Encyclopedia of Paleoclimatology and Ancient Environments, a companion volume to the recently-published Encyclopedia of World Climatology, provides the reader with an entry point to the rapidly expanding field of paleoclimatology—the study of climates of the past. Highly interdisciplinary in nature, paleoclimatology integrates information from a broad array of disciplines in the geosciences, ranging from stratigraphy, geomorphology, glaciology, paleoecology, paleobotany to geochemistry and geophysics, among others. The encyclopedia offers 230 informative articles written by over 200 well known international experts on numerous subjects, ranging from classical geological evidence to the latest research. The volume is abundantly illustrated with line-drawings, black-white and color photographs. Articles are arranged alphabetically, with extensive bibliographies and cross-references.
    Pages: Online-Ressource (1047 Seiten)
    ISBN: 9781402044113
    URL: http://link.springer.com/referencework/10.1007/978-1-4020-4411-3
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    Oil spill response : a global perspective ; [proceedings of the NATO CCMS Workshop on Oil Spill Response, Dartmouth, Nova Scotia, Canada, 11 - 13 October 2006 ; Third Annual Workshop on Oil Spill Response] (2008)
    Dordrecht : Springer
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    Call number: IASS 16.90608
    Type of Medium: Monograph available for loan
    Pages: XIX, 365 S , Ill., graph. Darst , 235 mm x 155 mm
    ISBN: 140208563X , 9781402085635 , 1402085648 , 9781402085642 , 9781402085659 (electronic)
    Series Statement: NATO science for peace and security series
    URL: http://www.gbv.de/dms/bowker/toc/9781402085642.pdf
    Language: English
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    Mechanical Response of Composites (2008)
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    ISBN: 9781402085840
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    Models, Mysteries and Magic of Molecules (2008)
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    Keywords: Analytical biochemistry ; Chemistry ; Chemistry, Physical organic ; Crystallography ; Molecular structure ; Nanotechnology
    ISBN: 9781402059414
    URL: https://doi.org/10.1007/978-1-4020-5941-4
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    Magnetic Nanostructures in Modern Technology : Spintronics, Magnetic MEMS and Recording (2008)
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    Keywords: Condensed matter ; Magnetism ; Memory management (Computer science) ; Nanotechnology ; Surfaces (Physics)
    ISBN: 9781402063381
    URL: https://doi.org/10.1007/978-1-4020-6338-1
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    Applied Spatial Data Analysis with R (2008)
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    Environmental Technology in the Oil Industry (2008)
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    Keywords: Chemical engineering ; Environmental sciences ; Geography ; Industrial engineering
    ISBN: 9781402054723
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    Safety, Reliability and Risks Associated with Water, Oil and Gas Pipelines (2008)
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    NMR in Biological Systems : From Molecules to Humans (2008)
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    Keywords: Biochemistry ; Biomedical engineering ; Biotechnology ; Chemistry, Physical organic ; Life sciences ; Radiology, Medical
    ISBN: 9781402066801
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    Keywords: Catalysis ; Chemical engineering ; Chemistry, Organic ; Environmental protection
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    Recent Advances in Adsorption Processes for Environmental Protection and Security (2008)
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    ISBN: 9781402068058
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    Engineering of Crystalline Materials Properties : State of the Art in Modeling, Design and Applications (2008)
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    Keywords: Crystallography ; Magnetism ; Materials ; Medicine ; Superconductivity
    ISBN: 9781402068232
    URL: https://doi.org/10.1007/978-1-4020-6823-2
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    Nanomaterials for Application in Medicine and Biology (2008)
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    Keywords: Biomaterials ; Chemistry, Physical organic ; Medicine ; Nanotechnology ; Neurosciences
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    Radiation Induced Molecular Phenomena in Nucleic Acids : A Comprehensive Theoretical and Experimental Analysis (2008)
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    ISBN: 9781402081842
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    Nuclear Risks in Central Asia (2008)
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    ISBN: 9781402083174
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    Impact of Pollution on Animal Products (2008)
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    Keywords: Analytical biochemistry ; Animal ecology ; Environmental protection ; Food science ; Medicine ; Soil conservation
    ISBN: 9781402083594
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    Materials Issues for Generation IV Systems : Status, Open Questions and Challenges (2008)
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    ISBN: 9781402084225
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    Narrow Gap Semiconductors 2007 : Proceedings of the 13th International Conference, 8–12 July, 2007, Guildford, UK (2008)
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    Keywords: Engineering ; Optical materials ; Physical optics
    ISBN: 9781402084256
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    Green Chemical Reactions (2008)
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    Keywords: Catalysis ; Chemistry, Organic
    ISBN: 9781402084584
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