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  • 1
    Monograph available for loan
    Monograph available for loan
    Stable isotopes in sedimentary geology (1983)
    Tulsa, Okla. : Society of Economic Paleontologists and Mineralogists
    Associated volumes
    Details Availability
    Call number: AWI G5-98-0371
    In: SEPM short course, No. 10
    Type of Medium: Monograph available for loan
    Pages: Getrennte Zählung , Illustrationen , 30 cm
    Series Statement: SEPM short course 10
    Language: English
    Note: CONTENTS: Introduction / Michael A. Arthur. - Chapter 1: Stable isotopes of oxygen and carbon and their application to sedimentologic and paleoenvironmental problems / Thomas F. Anderson and Michael A. Arthur. - Chapter 2: Stable isotopes of sulfur, nitrogen and deuterium in recent marine environments / Ian R. Kaplan. - Chapter 3: Chemical diagenesis of carbonates: theory and application of trace element technique / Ján Veizer. - Chapter 4: The application of stable isotopes to studies of the origin of dolomite and to problems of diagenesis of clastic sediments / Lynton S. Land. - Bibliography.
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
    Electronic Resource
    Electronic Resource
    Palaeoclimatology (Communication arising) Tropical temperatures in greenhouse episodes (2002)
    [s.l.] : Nature Publishing Group
    Nature 419 (2002), S. 897-898 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Reconstruction from oxygen-isotope data of global sea-surface temperatures (SSTs) that prevailed during periods when greenhouse-gas levels were higher than at present (that is, in the early Eocene and Cretaceous epochs) indicates that temperatures were significantly warmer than present in mid- ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/419897b
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  • 3
    Electronic Resource
    Electronic Resource
    Anatomy and origin of a Cretaceous phosphorite-greensand giant, Egypt (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 37 (1990), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Late Cretaceous epicontinental phosphorites, porcelanites/cherts, dark-coloured shales, glauconitic sandstones and bioclastic and fine-grained carbonate rocks in Egypt are examined in terms of their overall depositional and diagenetic framework and stable isotopic and organic geochemical characteristics. Two main depositional realms are interpreted and correlated through sequence stratigraphic analysis: (1) a shallow hemipelagic environment accompanying initial stages of marine transgression and conducive to the formation of organic carbon-rich shales, biosiliceous sediments and thick phosphorites, and (2) a relatively high energy depositional regime accompanying sea-level fall during which deltas advanced, glauconites were reworked seaward and prograding oyster banks became periodically exposed to episodes of fresh water diagenesis, thereby promoting solution-collapse phenomena in associated cherts. Lenticular to massive phosphorites are viewed as the result of current winnowing and concentration of authigenic grains initially precipitated in associated reducing shales and biosiliceous sediments. In eastern Egypt the phosphorites form winnowed lag layers, some of which may have been redeposited down slope in structural lows. In the west, these sands were concentrated into giant phosphorite sand waves built by reworking of penecontemporaneously deposited phosphatic muds during marine transgression. Carbon isotopic results substantiate interpretations from modern deposits for limitation of phosphate mineral precipitation with depth in sediments as a result of lattice poisoning. However, direct desorption of phosphorus to pore waters from detrital iron-oxyhydroxide phases also may have been important in the Cretaceous setting, the iron reduced in this process being available for incorporation in glauconites. The main locus for authigenic glauconite precipitation appears to be where iron fluxes from regions of lateritic weathering were highest and near the boundary between oxygenated and reduced waters.This study suggests a model for the common coexistence of glauconites and phosphorites in the geological record. Although upwelling is often advocated as the origin of nearly all giant phosphorite deposits, we suggest that some of these may have been strongly influenced by fluvially derived phosphorus borne on particulates and desorbed from these compounds upon flocculation and/or reduction in bottom waters or pore waters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3091.1990.tb01986.x
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  • 4
    Electronic Resource
    Electronic Resource
    Chemical Weathering, Atmospheric CO2, and Climate (2000)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Earth and Planetary Sciences 28 (2000), S. 611-667 
    Details
    ISSN: 0084-6597
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Geosciences , Physics
    Notes: Abstract There has been considerable controversy concerning the role of chemical weathering in the regulation of the atmospheric partial pressure of carbon dioxide, and thus the strength of the greenhouse effect and global climate. Arguments center on the sensitivity of chemical weathering to climatic factors, especially temperature. Laboratory studies reveal a strong dependence of mineral dissolution on temperature, but the expression of this dependence in the field is often obscured by other environmental factors that co-vary with temperature. In the field, the clearest correlation is between chemical erosion rates and runoff, indicating an important dependence on the intensity of the hydrological cycle. Numerical models and interpretation of the geologic record reveal that chemical weathering has played a substantial role in both maintaining climatic stability over the eons as well as driving climatic swings in response to tectonic and paleogeographic factors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.earth.28.1.611
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  • 5
    Electronic Resource
    Electronic Resource
    Glass from the Cretaceous/Tertiary boundary in Haiti (1991)
    [s.l.] : Nature Publishing Group
    Nature 349 (1991), S. 482-487 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Tektite-like glasses preserved at the Cretaceous/Tertiary boundary at Beloc in Haiti provide clear evidence of an impact event. The glass composition suggests that the impact occurred on a continental shelf region, generating a silica-rich glass with chemical composition that reflects the melting ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/349482a0
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  • 6
    Electronic Resource
    Electronic Resource
    Geochemical and climatic effects of increased marine organic carbon burial at the Cenomanian/Turonian boundary (1988)
    [s.l.] : Nature Publishing Group
    Nature 335 (1988), S. 714-717 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The stratigraphic position of the maximum values of the positive excursion in the carbon isotope composition of organic carbon (513Corg) corresponds closely with the maximum of the excursion in the corresponding quantity for carbonate (5I3Ccarb) (Fig. 2), within the latest Cenomanian and earliest ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/335714a0
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  • 7
    Electronic Resource
    Electronic Resource
    Geochemical evidence for suppression of pelagic marine productivity at the Cretaceous/Tertiary boundary (1989)
    [s.l.] : Nature Publishing Group
    Nature 337 (1989), S. 61-64 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The section at DSDP Site 577 on the Shatsky Rise (32á°26' N, 157á°43' E) was collected by hydraulic piston core and yielded the first continuous, undisturbed sequence of pure nannofossil ooze (〉90% CaCO3) across the Cretaceous/Tertiary (K/T) boundary. Because of the relatively ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/337061a0
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  • 8
    Electronic Resource
    Electronic Resource
    Stratigraphy: Carbon isotope anomalies? (1984)
    [s.l.] : Nature Publishing Group
    Nature 310 (1984), S. 450-451 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As stratigraphie resolution in some parts of the geological record improves, and sampling for stable isotope studies becomes ever more detailed, palaeoceano-graphers and geochemists are beginning to discover apparent evidence of major rapid changes in ocean-atmosphere chemistry. Many of these ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/310450a0
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  • 9
    Electronic Resource
    Electronic Resource
    Anomalous 13 C enrichment in modern marine organic carbon (1985)
    [s.l.] : Nature Publishing Group
    Nature 315 (1985), S. 216-218 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In a recent compilation of geochemical analyses of samples of middle Cretaceous organic C-rich strata from numerous Deep Sea Drilling Project (DSDP) sites and several land sections5, we failed to observe a consistent relationship between organic carbon 513C and independent geochemical indicators of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/315216a0
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  • 10
    Electronic Resource
    Electronic Resource
    Cooling in the late Cenozoic (1993)
    [s.l.] : Nature Publishing Group
    Nature 361 (1993), S. 123-124 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Raymo and Ruddiman1 propose a false dichotomy between climate hypoth-eses in which variations in atmospheric CO2 are driven either by accelerated weathering accompanying tectonic uplift or.by changes in CO2 outgassing. Fur-thermore, they propose that mountain uplift is the primary control on ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/361123b0
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