Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Selenium Isotope Paleobiogeochemistry
Download Selenium Isotope Paleobiogeochemistry full books in PDF, epub, and Kindle. Read online Selenium Isotope Paleobiogeochemistry ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Selenium Isotope Paleobiogeochemistry by : Eva E. Stüeken
Download or read book Selenium Isotope Paleobiogeochemistry written by Eva E. Stüeken and published by Cambridge University Press. This book was released on 2020-10-08 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The attraction of selenium isotopes as a paleoenvironmental tracer lies in the high redox potential of selenium oxyanions (SeIV and SeVI), the dominant species in the modern ocean. The largest isotopic fractionations occur during oxyanion reduction, which makes selenium isotopes a sensitive proxy for the redox evolution of our planet. As a case study we review existing data from the Neoarchean and Paleoproterozoic, which show that significant isotopic fractionations are absent until 2.5 Ga, and prolonged isotopic deviations only appear around 2.3 Ga. Selenium isotopes have thus begun to reveal complex spatiotemporal redox patterns not reflected in other proxies.
Book Synopsis Biogeochemical Cycling of Mineral-Forming Elements by : P.A. Trudinger
Download or read book Biogeochemical Cycling of Mineral-Forming Elements written by P.A. Trudinger and published by Elsevier. This book was released on 1979-01-01 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biogeochemical Cycling of Mineral-Forming Elements
Book Synopsis Isotope Geochemistry by : William M. White
Download or read book Isotope Geochemistry written by William M. White and published by John Wiley & Sons. This book was released on 2023-04-17 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a thorough and up-to-date overview of radiogenic and stable isotope geochemistry Now in its second edition, Isotope Geochemistry presents a comprehensive introduction to radiogenic and stable isotope geochemistry. The book opens with an overview of the physics and origins of atoms and nuclei, followed by a review of radioactive decay schemes and geochronological techniques such as fission-track and carbon-14 dating. Subsequent chapters cover nucleosynthetic anomalies in meteorites, early solar system chronology, the theory and application of stable isotope geochemistry, isotopic variation in the noble gases, and more. This edition includes new sections on thermochronology, U-He dating, recently published La–Ce isotope data, stable isotopes in ore deposits, nuclear volume and nuclear spin effects, and the application of isotope geochemistry in areas such as agriculture, forensics, and environmental studies. Revised and expanded discussions address topics including isotope cosmochemistry, non-traditional isotopes, nucleosynthesis, advanced U-Pb dating and isotopic analysis technologies, the subcontinental lithosphere, and mass-independent isotope fractionation. Describes the use of radiogenic isotopes in understanding the evolution of the Earth’s mantle, crust, and oceans Explores the use of stable isotopes in areas such as mantle evolution, archeology, paleontology, ore formation, and paleoclimatology Reviews new developments in the understanding of nucleosynthesis, including insights gained from the study of the 2017 neutron star merger detected by gravitational waves Discusses progress in the field of unconventional isotopes, advances in isotope cosmochemistry, and recent data on regional variations in isotopic compositions Illustrated in full color throughout, Isotope Geochemistry, Second Edition is an excellent textbook for undergraduate and postgraduate students in all earth science disciplines.
Book Synopsis Selenium in the Environment and Human Health by : Gary S. Banuelos
Download or read book Selenium in the Environment and Human Health written by Gary S. Banuelos and published by CRC Press. This book was released on 2013-11-29 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selenium is arguably the naturally occurring trace element of greatest concern worldwide. In excessive amounts it can lead to toxicosis and teratogenesis in animals, while the impact of selenium deficiency can be even more significant. Contributors from 22 countries explored the connections and inter-relationships between selenium in the environment, agriculture, human and animal health, and molecular and biochemistry processes to complete this book containing 90 peer-reviewed extended abstracts. The text represents glimpses of the presentations that were delivered at the 3rd International Conference on Selenium in the Environment and Human Health in 2013 in Hefei, China. We are indebted to the international authors representing a multitude of disciplines from academic, industry, and governments for sharing their extraordinary new knowledge on selenium research.
Book Synopsis Isotopic Constraints on Earth System Processes by : Kenneth W. W. Sims
Download or read book Isotopic Constraints on Earth System Processes written by Kenneth W. W. Sims and published by John Wiley & Sons. This book was released on 2022-06-01 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using isotopes as a tool for understanding Earth processes From establishing the absolute age of the Earth to providing a stronger understanding of the nexus between geology and life, the careful measurement and quantitative interpretation of minor variations in the isotopic composition of Earth’s materials has provided profound insight into the origins and workings of our planet. Isotopic Constraints on Earth System Processes presents examples of the application of numerous different isotope systems to address a wide range of topical problems in Earth system science. Volume highlights include: examination of the natural fractionation of non-traditional stable isotopes utilizing isotopes to understand the origin of magmas and evolution of volcanic systems application of isotopes to interrogate and understand Earth’s Carbon and Oxygen cycles examination of the geochemical and hydrologic processes that lead to isotopic fractionation application of isotopic reactive transport models to decipher hydrologic and biogeochemical processes The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.
Book Synopsis Sediments, Diagenesis, and Sedimentary Rocks by : F.T. Mackenzie
Download or read book Sediments, Diagenesis, and Sedimentary Rocks written by F.T. Mackenzie and published by Elsevier. This book was released on 2005-11-22 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume covers the formation and biogeochemistry of a variety of important sediment types from their initial formation through their conversion (diagenesis) to sedimentary rocks. The volume deals with the chemical, mineralogical, and isotopic properties of sediments and sedimentary rocks and their use in interpreting the environment of formation and subsequent events in the history of sediments, and the nature of the ocean-atmosphere system through geological time. Reprinted individual volume from the acclaimed Treatise on Geochemistry, (10 Volume Set, ISBN 0-08-043751-6, published in 2003). - Comprehensive and authoritative scope and focus - Reviews from renowned scientists across a range of subjects, providing both overviews and new data, supplemented by extensive bibliographies - Extensive illustrations and examples from the field
Book Synopsis Tracing Earth Surface Processes Using Novel Isotopic Approaches by : Kang-Jun Huang
Download or read book Tracing Earth Surface Processes Using Novel Isotopic Approaches written by Kang-Jun Huang and published by Frontiers Media SA. This book was released on 2023-02-27 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geochemistry of Non-Traditional Stable Isotopes by : Clark M. Johnson
Download or read book Geochemistry of Non-Traditional Stable Isotopes written by Clark M. Johnson and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-17 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal for Volume 55 of Reviews in Mineralogy and Geochemistry was to bring together a summary of the isotope geochemistry of non-traditional stable isotope systems as is known through 2003 for those elements that have been studied in some detail, and which have a variety of geochemical properties. In addition, recognizing that many of these elements are of interest to workers who are outside the traditional stable isotope fields, we felt it was important to include discussions on the broad isotopic variations that occur in the solar system, theoretical approaches to calculating isotopic fractionations, and the variety of analytical methods that are in use. We hope, therefore, that this volume proves to be useful to not only the isotope specialist, but to others who are interested in the contributions that these non-traditional stable isotopes may make toward understanding geochemical and biological cycles. The review chapters in this volume were the basis for a two-day short course on nontraditional stable isotopes held prior (May 15-16, 2004) to the spring AGU/CGU Meeting in Montreal, Canada.
Book Synopsis Stable Isotope Geochemistry by : Jochen Hoefs
Download or read book Stable Isotope Geochemistry written by Jochen Hoefs and published by Springer Science & Business Media. This book was released on 2009-01-13 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stable Isotope Geochemistry is an introduction to the use of stable isotopes in the geosciences. It is subdivided into three parts: theoretical and experimental principles; fractionation processes of light and heavy elements; the natural variations of geologically important reservoirs. Since the application of stable isotopes to earth sciences has grown in the last few years, a new edition appears necessary. Recent progress in analysing the rare isotopes of certain elements for instance allow the distinction between mass-dependent and mass-independent fractionations. Special emphasis has been given to the growing field of "heavy" elements. Many new references have been added, which will enable quick access to recent literature. For students and scientists alike the book will be a primary source of information with regard to how and where stable isotopes can be used to solve geological problems.
Book Synopsis Calcium Isotopes by : Elizabeth M. Griffith
Download or read book Calcium Isotopes written by Elizabeth M. Griffith and published by Cambridge University Press. This book was released on 2021-01-21 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precise measurements of the calcium (Ca) isotopes have provided constraints on Ca cycling at global and local scales, and quantified rates of carbonate diagenesis in marine sedimentary systems. Key to applying Ca isotopes as a geochemical tracer of Ca cycling, carbonate (bio)mineralization, and diagenesis is an understanding of the impact of multiple factors potentially impacting Ca isotopes in the rock record. These factors include variations in stable isotopic fractionation factors, the influence of local-scale Ca cycling on Ca isotopic gradients in carbonate settings, carbonate dissolution and reprecipitation, and the relationship between the Ca isotopic composition of seawater and mineral phases that record the secular evolution of seawater chemistry.
Book Synopsis Cerium Anomalies and Paleoredox by : Rosalie Tostevin
Download or read book Cerium Anomalies and Paleoredox written by Rosalie Tostevin and published by Cambridge University Press. This book was released on 2021-02-25 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce anomalies track changes in oxygen availability due to the anomalous redox-sensitivity of Ce compared with the other rare earth elements. The proxy systematics have been calibrated experimentally as well as in modern anoxic water bodies. Ce anomalies are unique because they track intermediate manganous conditions, rather than fully anoxic conditions. In addition, they are sensitive to local–regional redox conditions, and can be analysed in chemical sediments such as carbonate rocks. This makes them especially useful as a tool to track local oxygen distribution in shallow shelf environments, where biodiversity is highest. This review focusses on the systematics of the Ce anomaly proxy, the preservation and extraction of the signal in sedimentary rocks, and the potential applications of the proxy.
Book Synopsis Reconstructing Precambrian pCO2 and pO2 Using Paleosols by : Nathan D. Sheldon
Download or read book Reconstructing Precambrian pCO2 and pO2 Using Paleosols written by Nathan D. Sheldon and published by Cambridge University Press. This book was released on 2021-03-04 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paleosols formed in direct contact with the Earth's atmosphere, so they can record the composition of the atmosphere through weathering processes and products. Herein we critically review a variety of different approaches for reconstructing atmospheric O2 and CO2 over the past three billion years. Paleosols indicate relatively low CO2 over that time, requiring additional greenhouse forcing to overcome the 'faint young Sun' paradox in the Archean and Mesoproterozoic, as well as low O2 levels until the Neoproterozoic. Emerging techniques will revise the history of Earth's atmosphere further and may provide a window into atmospheric evolution on other planets.
Download or read book Pelagic Barite written by Weiqi Yao and published by Cambridge University Press. This book was released on 2021-01-28 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reconstruction of ocean paleoproductivity and paleochemistry is paramount to understanding global biogeochemical cycles such as the carbon, oxygen and sulfur cycles and the responses of these cycles to changes in climate and tectonics. Paleo-reconstruction involves the application of various tracers that record seawater compositions, which in turn may be used to infer oceanic processes. Several important tracers are incorporated into pelagic barite, an authigenic mineral that forms in the water column. Here we summarize the utility of pelagic barite for the reconstruction of export production and as a recorder of seawater S, O, Sr, Ca and Ba.
Book Synopsis New Publications of the Geological Survey by : Geological Survey (U.S.)
Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1986 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vanadium Isotopes by : Sune G. Nielsen
Download or read book Vanadium Isotopes written by Sune G. Nielsen and published by Cambridge University Press. This book was released on 2021-01-28 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vanadium isotope ratios (51V/50V) have potential to provide information about changes in past ocean oxygen contents. In particular, V isotopes may find utility in tracing variations at non-zero oxygen concentrations because the redox couple that controls V elemental and isotopic abundances in seawater (vanadate-vanadyl) appears to operate around 10M O2. This characteristic sets V isotopes apart from many other metal isotope redox proxies that require more reducing conditions to register significant changes in their isotope budgets. The oxygen abundance sensitivity range of V isotopes suggests that this paleoproxy could be particularly useful in tracing marine oxygenation changes throughout the Phanerozoic and potentially beyond.
Book Synopsis The Chromium Isotope System as a Tracer of Ocean and Atmosphere Redox by : Kohen W. Bauer
Download or read book The Chromium Isotope System as a Tracer of Ocean and Atmosphere Redox written by Kohen W. Bauer and published by Cambridge University Press. This book was released on 2021-02-25 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stable chromium (Cr) isotope system has emerged over the past decade as a new tool to track changes in the amount of oxygen in earth's ocean-atmosphere system. Much of the initial foundation for using Cr isotopes (δ53Cr) as a paleoredox proxy has required recent revision. However, the basic idea behind using Cr isotopes as redox tracers is straightforward—the largest isotope fractionations are redox-dependent and occur during partial reduction of Cr(VI). As such, Cr isotopic signatures can provide novel insights into Cr redox cycling in both marine and terrestrial settings. Critically, the Cr isotope system—unlike many other trace metal proxies—can respond to short-term redox perturbations (e.g., on timescales characteristic of Pleistocene glacial-interglacial cycles). The Cr isotope system can also be used to probe the earth's long-term atmospheric oxygenation, pointing towards low but likely dynamic oxygen levels for the majority of Earth's history.
Book Synopsis Treatise on Geochemistry by : K.K. Turekian
Download or read book Treatise on Geochemistry written by K.K. Turekian and published by Elsevier Science. This book was released on 2003-12-18 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Treatise on Geochemistry is the first work providing a comprehensive, integrated summarry of the present state of geochemistry. It deals with all the major subjects in the field, ranging from the chemistry of the solar system to environmental geochemistry. The Treatise on Geochemistry has drawn on the expertise of outstanding scientists throughout the world, creating the reference work in geochemistry for the next decade. Each volume consists of fifteen to twenty-five chapters written by recognized authorities in their fields, and chosen by the Volume Editors in consultation with the Executive Editors. Particular emphasis has been placed on integrating the subject matter of the individual chapters and volumes. Elsevier also offers the Treatise on Geochemistry in electronic format via the online platform ScienceDirect®, the most comprehensive database of academic research on the Internet today, enhanced by a suite of sophisticated linking, searching and retrieval tools.
