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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (11143 pages)
    Edition: 1st ed.
    ISBN: 9780080548074
    Language: English
    Note: Cover image -- Title page -- Table of Contents -- Executive Editors -- Volume Editors -- Executive Editors' Foreword -- Introduction to Volume 1 -- Introduction to Volume 2 -- Introduction to Volume 3 -- Introduction to Volume 4 -- Introduction to Volume 5 -- Introduction to Volume 6 -- Introduction to Volume 7 -- Introduction to Volume 8 -- Introduction to Volume 9 -- Permission Acknowledgments -- Volume 1: Meteorites, Comets, and Planets -- Origin of the Elements -- Presolar Grains -- Solar System Abundances of the Elements -- The Solar Nebula -- Classification of Meteorites -- Oxygen Isotopes in Meteorites -- Chondrites and Their Components -- Calcium-Aluminum-Rich Inclusions in Chondritic Meteorites -- Nebular versus Parent-body Processing -- Structural and Isotopic Analysis of Organic Matter in Carbonaceous Chondrites -- Achondrites -- Iron and Stony-Iron Meteorites -- Cosmic-Ray Exposure Ages of Meteorites -- Noble Gases -- Condensation and Evaporation of Solar System Materials -- Early Solar System Chronology -- Planet Formation -- Mercury -- Venus -- The Origin and Earliest History of the Earth -- The Moon -- Mars -- Giant Planets -- Major Satellites of the Giant Planets -- Comets -- Interplanetary Dust Particles -- Long-Lived Chronometers -- The Geochemistry and Cosmochemistry of Impacts -- Volume 2: The Mantle and Core -- Cosmochemical Estimates of Mantle Composition -- Seismological Constraints upon Mantle Composition -- Sampling Mantle Heterogeneity through Oceanic Basalts: Isotopes and Trace Elements -- Orogenic, Ophiolitic, and Abyssal Peridotites -- Mantle Samples Included in Volcanic Rocks: Xenoliths and Diamonds -- Noble Gases as Mantle Tracers -- Mantle Volatiles-Distribution and Consequences -- Melt Extraction and Compositional Variability in Mantle Lithosphere. , Trace Element Partitioning under Crustal and Uppermost Mantle Conditions: The Influences of Ionic Radius, Cation Charge, Pressure, and Temperature -- Partition Coefficients at High Pressure and Temperature -- Subduction Zone Processes and Implications for Changing Composition of the Upper and Lower Mantle -- Convective Mixing in the Earth's Mantle -- Compositional Evolution of the Mantle -- Experimental Constraints on Core Composition -- Compositional Model for the Earth's Core -- Volume 3: The Crust -- Composition of the Continental Crust -- Constraints on Crustal Heat Production from Heat Flow Data -- Continental Basaltic Rocks -- Volcanic Degassing -- Timescales of Magma Transfer and Storage in the Crust -- Fluid Flow in the Deep Crust -- Geochemical Zoning in Metamorphic Minerals -- Geochronology and Thermochronology in Orogenic Systems -- Continental Crust Subduction and Ultrahigh Pressure Metamorphism -- Ages and Growth of the Continental Crust from Radiogenic Isotopes -- Granitic Perspectives on the Generation and Secular Evolution of the Continental Crust -- Ores in the Earths Crust -- Geochemistry of the Igneous Oceanic Crust -- Melt Migration in Oceanic Crustal Production: A U-series Perspective -- Hydrothermal Alteration Processes in the Oceanic Crust -- Oceanic Plateaus -- Generation of Mobile Components during Subduction of Oceanic Crust -- One View of the Geochemistry of Subduction-Related Magmatic Arcs, with an Emphasis on Primitive Andesite and Lower Crust -- The Lower Oceanic Crust -- Trace Element and Isotopic Fluxes/Subducted Slab -- Magmatic Ore Deposits -- Volume 4: The Atmosphere -- Ozone, Hydroxyl Radical, and Oxidative Capacity -- Tropospheric Halogen Chemistry -- Global Methane Biogeochemistry -- Tropospheric Aerosols -- Biomass Burning: The Cycling of Gases and Particulates from the Biosphere to the Atmosphere. , Nonmass-Dependent Isotopic Fractionation Processes: Mechanisms and Recent Observations in Terrestrial and Extraterrestrial Environments -- The Stable Isotopic Composition of Atmospheric CO2 -- Water Stable Isotopes: Atmospheric Composition and Applications in Polar Ice Core Studies -- Radiocarbon -- Natural Radionuclides in the Atmosphere -- The History of Planetary Degassing as Recorded by Noble Gases -- The Origin of Noble Gases and Major Volatiles in the Terrestrial Planets -- Record of Mineral Aerosols and Their Role in the Earth System -- Stratospheric Chemistry -- Volume 5: Surface and Ground Water, Weathering, and Soils -- Soil Formation -- Modeling Low-Temperature Geochemical Processes -- Reaction Kinetics of Primary Rock-forming Minerals under Ambient Conditions -- Mass-balance Approach to Interpreting Weathering Reactions in Watershed Systems -- Natural Weathering Rates of Silicate Minerals -- Plants and Mineral Weathering: Present and Past -- Geochemical Weathering in Glacial and Proglacial Environments -- Global Occurrence of Major Elements in Rivers -- Trace Elements in River Waters -- Dissolved Organic Matter in Freshwaters -- Stable Isotope Applications in Hydrologic Studies -- Radiogenic Isotopes in Weathering and Hydrology -- Geochemistry of Saline Lakes -- Geochemistry of Groundwater -- Groundwater Dating and Residence-time Measurements -- Deep Fluids in the Continents: I. Sedimentary Basins -- Deep Fluids in the Continents: II. Crystalline Rocks -- Soils and Global Change in the Carbon Cycle over Geological Time -- Cosmogenic Nuclides in Weathering and Erosion -- Chemical Weathering Rates, CO2 Consumption, and Control Parameters Deduced from the Chemical Composition of Rivers -- Volume 6: The Oceans and Marine Geochemistry -- Physicochemical Controls on Seawater -- Controls of Trace Metals in Seawater -- Gases in Seawater. , The Biological Pump -- Marine Bioinorganic Chemistry: The Role of Trace Metals in the Oceanic Cycles of Major Nutrients -- Organic Matter in the Contemporary Ocean -- Hydrothermal Processes -- Tracers of Ocean Mixing -- Chemical Tracers of Particle Transport -- Biological Fluxes in the Ocean and Atmospheric pCO2 -- Sediment Diagenesis and Benthic Flux -- Geochronometry of Marine Deposits -- Geochemical Evidence for Quaternary Sea-level Changes -- Elemental and Isotopic Proxies of Past Ocean Temperatures -- Alkenone Paleotemperature Determinations -- Tracers of Past Ocean Circulation -- Long-lived Isotopic Tracers in Oceanography, Paleoceanography, and Ice-sheet Dynamics -- The Biological Pump in the Past -- The Oceanic CaCO3 Cycle -- Records of Cenozoic Ocean Chemistry -- The Geologic History of Seawater -- Volume 7: Sediments, Diagenesis, and Sedimentary Rocks -- Chemical Composition and Mineralogy of Marine Sediments -- The Recycling of Biogenic Material at the Seafloor -- Formation and Diagenesis of Carbonate Sediments -- The Diagenesis of Biogenic Silica: Chemical Transformations Occurring in the Water Column, Seabed, and Crust -- Formation and Geochemistry of Precambrian Cherts -- Geochemistry of Fine-grained Sediments and Sedimentary Rocks -- Late Diagenesis and Mass Transfer in Sandstone-Shale Sequences -- Coal Formation and Geochemistry -- Formation and Geochemistry of Oil and Gas -- Sulfur-rich Sediments -- Manganiferous Sediments, Rocks, and Ores -- Green Clay Minerals -- Chronometry of Sediments and Sedimentary Rocks -- The Geochemistry of Mass Extinction -- Evolution of Sedimentary Rocks -- Stable Isotopes in the Sedimentary Record -- Volume 8: Biogeochemistry -- The Early History of Life -- Evolution of Metabolism -- Sedimentary Hydrocarbons, Biomarkers for Early Life -- Biomineralization. , Biogeochemistry of Primary Production in the Sea -- Biogeochemistry of Terrestrial Net Primary Production -- Biogeochemistry of Decomposition and Detrital Processing -- Anaerobic Metabolism: Linkages to Trace Gases and Aerobic Processes -- The Geologic History of the Carbon Cycle -- The Contemporary Carbon Cycle -- The Global Oxygen Cycle -- The Global Nitrogen Cycle -- The Global Phosphorus Cycle -- The Global Sulfur Cycle -- Volume 9: Environmental Geochemistry -- Groundwater and Air Contamination: Risk, Toxicity, Exposure Assessment, Policy, and Regulation -- Arsenic and Selenium -- Heavy Metals in the Environment-Historical Trends -- Geochemistry of Mercury in the Environment -- The Geochemistry of Acid Mine Drainage -- Environmental Geochemistry of Radioactive Contamination -- The Medical Geochemistry of Dusts, Soils, and Other Earth Materials -- Worldwide Eutrophication of Water Bodies: Causes, Concerns, Controls -- Salinization and Saline Environments -- Acidification and Acid Rain -- Tropospheric Ozone and Photochemical Smog -- Volatile Fuel Hydrocarbons and MTBE in the Environment -- High-Molecular-Weight Petrogenic and Pyrogenic Hydrocarbons in Aquatic Environments -- Biogeochemistry of Halogenated Hydrocarbons -- The Geochemistry of Pesticides -- The Groundwater Geochemistry of Waste Disposal Facilities -- Appendices -- Appendix 1. Periodic Table of the Elements -- Appendix 2. Table of Isotopes -- Appendix 3. The Geologic Timescale -- Appendix 4. Useful Values -- Subject Index -- Authors.
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Environmental science & technology 6 (1972), S. 1123-1124 
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Earth and Planetary Sciences 5 (1977), S. 227-255 
    ISSN: 0084-6597
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 696-697 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The concentrations of barium in some deep-sea sediments of the Pacific Ocean have been shown to be correlative with surface biological productivity2 although all the reasons for the association are not known. A similar relationship is evident for the Atlantic Ocean from this study. Fig. 1 is a ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 277-278 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In considering the alkaline-earths, calcium and strontium, it is evident that, if the sea is in the steady state (an assumption which seems reasonable at least from the Tertiary), then a material balance equation may be written for each element in the following manner: calcium: RM + RC + R D - RS ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 352 (1991), S. 226-228 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Radioactive 35S (0-decay to 35C1) is produced in the atmos-phere by the bombardment of 40Ar with cosmic rays and has been observed in wet precipitation7'9. Junkermann and Roedel10 argue that most 38S (and by analogy 35S) produced by cosmic rays is rapidly converted to 38SO2, basing this argument on ...
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fish ages are often estimated by assuming an annual frequency of the band-like, growth-zones recorded in the largest of their otoliths, the sagittae. The total number of growth-zones are normally determined either by counting external growth-zones (whole otolith technique) or by examining otolith cross-sections (otolith section technique). The two techniques do not always yield the same age, however, particularly in older specimens of certain fishes. To resolve this problem, otoliths of the splitnose rockfish Sebastes diploproa were examined morphologically and were assayed for their natural radionuclide concentrations. Four age groups of otoliths were identified based on growth-zone counting; in the first three, whole otolith and otolith section age estimates agreed, while in the fourth, the otolith section age substantially exceeded the whole otolith age. Radiometric analysis demonstrated that all otoliths were deficient in 210Pb activity relative to 226Ra activity with the deficiency decreasing with increasing number of growth-zones. The magnitude of the 210Pb/226Ra radioactive disequilibrium in each otolith group, when compared to the number of growth-zones and the otolith weight histories derived with the two techniques, identifies the growth-zones revealed by otolith sections as annual features. Thus when otolith section age exceeds whole otolith age (usually occurring after 20 to 25 yr of age for this species), the otolith section technique is the correct method of age determination. Estimates of longevity in the genus Sebastes near 80 yr are therefore confirmed.
    Type of Medium: Electronic Resource
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  • 8
    Publication Date: 2020-06-03
    Description: Evaluating the effects of diagenesis on the isotopic compositions of Sr, O, and C in marine carbonates is critical to their use as proxies in reconstructing information on the salinity, temperature and dissolved inorganic carbon of ancient oceans. We have analyzed a series of samples of mollusk shells from the Baculites compressus zone (late Campanian) of the Pierre Shale of South Dakota. Samples included outer shell material and septa of cephalopods collected inside and outside concretions. Preservation was evaluated using light microscopy, scanning electron microscopy (SEM), trace element analysis and X-ray diffraction. All of the material consists of aragonite based on X-ray diffraction. An SEM preservation index (PI) was established based on comparison of the microstructure of the fossil material with that of modern Nautilus. Excellent preservation (PI = 5) was characterized by well-defined nacreous plates with discrete, angular boundaries. In contrast, samples showing fused nacreous plates with indistinct boundaries were rated poor (PI = 1). 87Sr/86Sr ratios vary with preservation and average 0.707648 ± .000021 (n = 10) for excellent preservation (PI ≈ 5), 0.707615 ± .000028 (n = 5) for good preservation (PI ≈ 3), 0.707404 ± .000074 (n=7) for fair preservation (PI ≈ 2), and 0.707261 ± .000053 (n=8) for poor preservation (PI ≈ 1). These data suggest that as the quality of the preservation declines, the mean 87Sr/86Sr ratio decreases and the standard error of the mean increases. Oxygen and carbon isotope analyses of the same specimens also show decreases with preservation, and δ18O, δ13C and 87Sr/86Sr are well correlated, suggesting that these tracers are all altered as the PI decreases. The Sr/Ca ratio increases as preservation decreases, indicating that Sr is added to the shell material during diagenesis. In contrast, Mg/Ca shows no trend with preservation. If the increasing Sr concentration (and decreasing 87Sr/86Sr) of the shell material with decreasing preservation represents the addition of Sr to the shell during diagenesis, we calculate that the added Sr had 87Sr/86Sr ranging from 0.707582 to 0.707032. Potential sources of the added Sr include older marine carbonates and weathering of volcanic ash layers present in the shale. The mechanisms of alteration likely include epitaxial growth of strontianite on the original shell aragonite and isotopic exchange of C and O between alteration fluids and shell carbonate. We conclude that SEM preservation criteria are effective in screening shell material that records original isotopic values and that variations in Sr, O and C isotope composition in well-preserved material can be used to assess paleoenvironmental parameters, such as salinity and temperature. Our results also indicate that assessing preservation is a critical prerequisite to the determination of numerical ages of shell material using strontium isotope stratigraphy.
    Type: Article , PeerReviewed
    Format: text
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