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  • 1
    Call number: 9/M 07.0421(446)
    In: Geological Society special publication ; 446
    Type of Medium: Series available for loan
    Pages: 382 Seiten , Illustrationen, Karten, Diagramme
    ISBN: 9781786202765
    Series Statement: Special publication / Geological Society of London no. 446
    Classification:
    Geophysics
    Language: English
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Keywords: volcanism ; volcanic systems ; small-scale volcanoes
    Description / Table of Contents: I. E. M. Smith and K. Németh: Source to surface model of monogenetic volcanism: a critical review / Geological Society, London, Special Publications, 446:1-28, first published on March 31, 2017, doi:10.1144/SP446.14 --- Volker Lorenz, Peter Suhr, and Stefan Suhr: Phreatomagmatic maar-diatreme volcanoes and their incremental growth: a model / Geological Society, London, Special Publications, 446:29-59, first published on September 27, 2016, doi:10.1144/SP446.4 --- Karen G. Bemis and Margot Ferencz: Morphometric analysis of scoria cones: the potential for inferring process from shape / Geological Society, London, Special Publications, 446:61-100, first published on January 17, 2017, doi:10.1144/SP446.9 --- Stephan Kurszlaukis and Volker Lorenz: Differences and similarities between emplacement models of kimberlite and basaltic maar-diatreme volcanoes / Geological Society, London, Special Publications, 446:101-122, first published on October 5, 2016, doi:10.1144/SP446.5 --- R. A. F. Cas, J. van Otterloo, T. N. Blaikie, and J. van den Hove: The dynamics of a very large intra-plate continental basaltic volcanic province, the Newer Volcanics Province, SE Australia, and implications for other provinces / Geological Society, London, Special Publications, 446:123-172, first published on November 7, 2016, doi:10.1144/SP446.8 --- H. Murcia, J. M. Lindsay, K. Németh, I. E. M. Smith, S. J. Cronin, M. R. H. Moufti, N. N. El-Masry, and S. Niedermann: Geology and geochemistry of Late Quaternary volcanism in northern Harrat Rahat, Kingdom of Saudi Arabia: implications for eruption dynamics, regional stratigraphy and magma evolution / Geological Society, London, Special Publications, 446:173-204, first published on September 30, 2016, doi:10.1144/SP446.2 --- Alexandrina Fulop and Stephan Kurszlaukis: Monogenetic v. polygenetic kimberlite volcanism: in-depth examination of the Tango Extension Super Structure, Attawapiskat kimberlite field, Ontario, Canada / Geological Society, London, Special Publications, 446:205-224, first published on September 23, 2016, doi:10.1144/SP446.7 --- José Jorge Aranda-Gómez, Mariano Cerca, Luis Rocha-Treviño, Jaime Jesús Carrera-Hernández, Gilles Levresse, Jesús Pacheco, Vsevolod Yutsis, Jorge Arturo Arzate-Flores, Elizabeth Chacón, and Hugo Beraldi-Campesi: Structural evidence of enhanced active subsidence at the bottom of a maar: Rincón de Parangueo, México / Geological Society, London, Special Publications, 446:225-254, first published on September 29, 2016, doi:10.1144/SP446.1 --- R. Saucedo, J. L. Macías, Y. Z. E. Ocampo-Díaz, W. Gómez-Villa, E. Rivera-Olguín, R. Castro-Govea, J. M. Sánchez-Núñez, P. W. Layer, J. R. Torres Hernández, and G. Carrasco-Núñez: Mixed magmatic–phreatomagmatic explosions during the formation of the Joya Honda maar, San Luis Potosí, Mexico / Geological Society, London, Special Publications, 446:255-279, first published on February 28, 2017, doi:10.1144/SP446.11 --- Román Alvarez, Fernando Corbo Camargo, Vsevolod V. Yutsis, and Jorge A. Arzate: A volcanic centre in Mexico's Pacific continental shelf / Geological Society, London, Special Publications, 446:281-293, first published on March 3, 2017, doi:10.1144/SP446.12 --- Román Alvarez, Fernando Corbo Camargo, and Vsevolod V. Yutsis: Geophysical modelling of Isla Isabel: a volcanic island on the Mexican continental margin / Geological Society, London, Special Publications, 446:295-310, first published on March 3, 2017, doi:10.1144/SP446.13 --- Walter Báez, Gerardo Carrasco Nuñez, Guido Giordano, José G. Viramonte, and Agostina Chiodi: Polycyclic scoria cones of the Antofagasta de la Sierra basin, Southern Puna plateau, Argentina / Geological Society, London, Special Publications, 446:311-336, first published on September 26, 2016, doi:10.1144/SP446.3 --- Guadalupe Maro and Pablo J. Caffe: Neogene monogenetic volcanism from the Northern Puna region: products and eruptive styles / Geological Society, London, Special Publications, 446:337-359, first published on September 26, 2016, doi:10.1144/SP446.6 --- C. Borrero, H. Murcia, J. Agustin-Flores, M. T. Arboleda, and A. M. Giraldo: Pyroclastic deposits of San Diego maar, central Colombia: an example of a silicic magma-related monogenetic eruption in a hard substrate / Geological Society, London, Special Publications, 446:361-374, first published on December 15, 2016, doi:10.1144/SP446.10
    Pages: Online-Ressource (382 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 9781786202765
    Language: English
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  • 3
    ISSN: 1432-0819
    Keywords: Key words Mexican volcanoes ; Citlaltépetl ; Ignimbrites ; Fluidization ; SFT ; Mechanisms of transport and emplacement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The Citlaltépetl Ignimbrite records one of the largest explosive events during the Holocene activity of Citlaltépetl Volcano (Pico de Orizaba). Multiple pyroclastic flow units, a fall deposit, and some lahar units were emplaced between 8500–9000 y B.P. as a result of repetitive but discrete explosive events. The whole ignimbrite resulted from discrete fluctuations in eruptive intensity that decreased with time. The initial pyroclastic flow pulse was by far the most violent and widespread event, and its deposits show conspicuous variations in structure and texture that could be associated with different mechanisms of transport and emplacement. Subpopulation Sequential Fragmentation Transport (SFT) analyses were carried out in order to determine the physical mechanisms that selectively concentrate or remove particles in the moving flows. We suggest that lateral and temporal changes in the flow rheology, in which fluidization, yield strength, entrainment of atmospheric air, and sedimentation played a dominant role in flow propagation and emplacement, may imprint a unique signature in the grain-size spectra. The lowermost unit of the Citlaltépetl Ignimbrite can be envisaged by a model in which progressive aggradation near the vent became replaced by en masse emplacement farther outward.
    Type of Medium: Electronic Resource
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  • 4
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    In:  Supplement to: Cai, Yue; LaGatta, Alexandra; Goldstein, Steven L; Langmuir, Charles H; Gómez-Tuena, Arturo; Martín-del Pozzo, Ana Lillian; Carrasco-Núñez, Gerardo (2014): Hafnium isotope evidence for slab melt contributions in the Central Mexican Volcanic Belt and implications for slab melting in hot and cold slab arcs. Chemical Geology, 377, 45-55, https://doi.org/10.1016/j.chemgeo.2014.04.002
    Publication Date: 2023-02-17
    Description: This study presents evidence that Quaternary frontal arc calc-alkaline lavas from Central Mexican Volcanic Belt (CMVB) contain contributions from partial melts of the subducting garnet-bearing eclogitic oceanic crust and sediment, based on chemical and Hf-Nd isotope data. The CMVB includes both calc-alkaline lavas with arc-type trace element patterns such as aqueous fluid mobile element enrichments and high field strength element depletions; and "high-Nb" alkaline lavas with trace element patterns similar to ocean island basalts. The two types of lavas are closely related geographically and temporally. Distinct from the high-Nb lavas, the calc-alkaline lavas show trends toward higher 176Hf/177Hf and 143Nd/144Nd ratios coupled with lower Lu/Hf. The high Hf-Nd isotope ratios fingerprint contributions of subducted basaltic ocean crust, while the correlation with low Lu/Hf indicates melting in the presence of residual garnet, which reflects conversion of the subducted oceanic crust to eclogite. Isotopic and chemical mass balance considerations indicate that the slab melts are ~ 80% basaltic oceanic crust and ~ 20% subducted sediment. The calc-alkaline lavas have higher SiO2 at a given Mg# compared to the high-Nb alkaline lavas, also reflecting melt contributions from the subducted slab. A survey of global arc lavas shows that calc-alkaline lavas with low Lu/Hf ratios, reflecting melting in the presence of residual garnet and preferential mobilization of Hf over Lu from the subducted slab, are generally associated with hot slab conditions. These include arcs where young (〈 30 Ma old) ocean crust is subducted (e.g. Mexican Volcanic Belt, Cascades, Austral Andes, Luzon, Setouchi), where slab tearing occurred and hot asthenospheric mantle could upwell through the slab window (e.g., western Aleutians, Sunda, southern Scotia), and where oblique or slow subduction leads to higher slab temperatures (e.g. Lesser Antilles, western Aleutians). In some of these hot slab arcs, where low Lu/Hf ratios are coupled with high Nd-Hf isotope ratios, slab melt contributions are dominated by partial melts from the subducted oceanic basalt (e.g., Mexican Volcanic Belt, Aleutians and Cascades). In other hot slab arcs, low Lu/Hf ratios are coupled with low Nd-Hf isotope ratios, reflecting slab contributions dominated by sediment melts (e.g. Setouchi, Lesser Antilles, Luzon, Sunda, and southern Scotia). Arcs associated with colder subducted oceanic crust (e.g. Izu-Bonin-Marianas, Tonga-Kermadec, central and northern Scotia) erupt lavas with high Lu/Hf along with high Hf-Nd isotope ratios, similar to mid-ocean ridge basalts, thus they lack the signature of residual garnet as well as significant slab melt input.
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 5
    Publication Date: 2023-07-10
    Keywords: 66-487; ASC-1; ASC24C; ASC43B; ASC44B; ASC45B; ASC47; ASC6B; ASC7C; ASWA5; ASWA9; C46; C64; CP22; CP35; CP40A; DRILL; Drilling/drill rig; Error; Event label; Glomar Challenger; Hafnium; Hafnium-176/Hafnium-177; International Generic Sample Number; Latitude of event; Leg66; Location; Longitude of event; LPO18; LPO2; LPO7; Lutetium; Magnesium; Neodymium; Neodymium-143/Neodymium-144 ratio; Niobium; North Pacific/TRENCH; PW115; PW141; PW293; PW296; Reproducibility; Sample comment; SCI30; SCI32; SCI33; SCI34; SCI35; SCI42; SCI43; Silicon dioxide; SPO34; SPO53; SPO55; SPO56; SPO57; SPO58B; SX1; Tantalum; Thorium; TP10C; TP13; Zirconium; ε-Hafnium; ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 782 data points
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  • 6
    Publication Date: 2023-07-05
    Keywords: Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Error; Event label; Hafnium-176/Hafnium-177; International Generic Sample Number; Latitude of event; Longitude of event; Neodymium-143/Neodymium-144 ratio; PC; Piston corer; RC10; RC10-244; RC13; RC13-123; Reproducibility; Robert Conrad; VM18-329; ε-Hafnium; ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 58 data points
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  • 7
    Publication Date: 2023-07-10
    Keywords: Aluminium oxide; AN160; AN179; AN182; AN81; Barium; Caesium; Calcium oxide; Cerium; Dysprosium; Error; Europium; Event label; Gadolinium; Hafnium; Hafnium-176/Hafnium-177; ICP-MS (Thermo Scientific, X-series); International Generic Sample Number; Iron oxide, FeO; Lanthanum; Latitude of event; Lead; Longitude of event; Lutetium; M32; M34; M69; Magnesium; Magnesium oxide; Manganese oxide; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Neodymium; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; Nevado de Toluca; Niobium; Phosphorus pentoxide; Potassium oxide; Praseodymium; RAM101; RAM215; RAM22; RAM452; RAM453; RAM592; Reproducibility; Rubidium; Samarium; Sample comment; Silicon dioxide; Sodium oxide; Strontium; Tantalum; Terbium; Thermal Ionization Mass Spectrometry (TIMS); Thorium; Titanium dioxide; Uranium; X-ray fluorescence spectroscopy (Siemens SRS-3000); Ytterbium; Yttrium; Zirconium; ε-Hafnium; ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 568 data points
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  • 8
    Publication Date: 2020-07-14
    Description: SUMMARY This study focuses in the analysis of the internal structure of the upper 3 km of Los Humeros (LH) caldera and the relation of electrical and hydrothermal anomalies. For this purpose, we measured, processed and interpreted 78 broad-band magnetotelluric (MT) soundings. We performed a 3-D inversion of the data set (ModEM) using all MT soundings, although only half of the available frequencies per sounding due to limited computed power. We also carried out the 2-D inversions (NLCG) of the invariant determinant along two orthogonal profiles (EW and NS) crossing the caldera structure; their comparison yields similar resistivity and structural models results. The resistivity modelling is complemented with the results of a joint 3-D inversion of an accurate gravity database of 720 stations, and total field aeromagnetic data (SGM) from the caldera crater. The combined results provide novel details about the structure of the shallow geothermal reservoir of the resurgence caldera complex hosting the active hydrothermal system. Density and resistivity models show the existence of a composed crater basin structure separated by an EW high-density structure; the northern basin is associated to the LH crater, whereas the southern basin associates to the emergent Los Potreros (LP) caldera basin. The magnetization model indicates that there is a common source for the magnetic volcanic products observed at the caldera surface, and that the LP fault is the more magnetized fault of the geothermal system. The propylic zoning under the geothermal field, which according to the MT model results has resistivities above ∼100 Ω-m, was extrapolated using this and additional criteria to obtain the distribution of other hypothetical propylitic zones of hydrothermal potential.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
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  • 9
    Publication Date: 2020-04-16
    Description: Resurgent calderas are excellent targets for geothermal exploration, as they are associated with the shallow emplacement of magma, resulting in widespread and long-lasting hydrothermal activity. Resurgence is classically attributed to the uplift of a block or dome resulting from the inflation of the collapse-forming magma chamber due to the intrusion of new magma. The Los Humeros volcanic complex (LHVC; Mexico) consists of two nested calderas: the outer and older Los Humeros formed at 164 ka and the inner Los Potreros formed at 69 ka. The latter is resurgent and currently the site of an active and exploited geothermal field (63 MWe installed). Here we aim to better define the characteristics of the resurgence in Los Potreros by integrating fieldwork with analogue models and evaluating the spatio-temporal evolution of the deformation as well as the depth and extent of the intrusions responsible for the resurgence, which may also represent the local heat source(s). Structural field analysis and geological mapping show that the floor of the Los Potreros caldera is characterized by several lava domes and cryptodomes (with normal faulting at the top) that suggest multiple deformation sources localized in narrow areas. Analogue experiments are used to define the possible source of intrusion responsible for the observed surface deformation. We apply a tested relationship between the surface deformation structures and depth of elliptical sources to our experiments with sub-circular sources. We found that this relationship is independent of the source and surface dome eccentricity, and we suggest that the magmatic sources inducing the deformation in Los Potreros are located at very shallow depths (hundreds of metres), which is in agreement with the well data and field observations. We propose that the recent deformation at LHVC is not a classical resurgence associated with the bulk inflation of a deep magma reservoir; rather, it is related to the ascent of multiple magma bodies at shallow crustal conditions (
    Print ISSN: 1869-9510
    Electronic ISSN: 1869-9529
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 10
    Publication Date: 2013-11-24
    Print ISSN: 0269-4042
    Electronic ISSN: 1573-2983
    Topics: Geosciences , Medicine
    Published by Springer
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