The Uranium Isotope Paleoredox Proxy

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The Uranium Isotope Paleoredox Proxy

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Author : Kimberly V. Lau
language : en
Publisher: Cambridge University Press
Release Date : 2019-08-29

The Uranium Isotope Paleoredox Proxy written by Kimberly V. Lau and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-08-29 with Science categories.

Uranium isotopes (238U/235U) have emerged as a proxy to reconstruct the redox conditions of the Earth's oceans and atmosphere based upon the large isotopic fractionation between reduced U(IV) and oxidized U(VI). Variations in 238U/235U, particularly when recorded in carbonate sediments, can track global trends in marine oxygenation and de-oxygenation. It is unique from other proxies because reduction primarily occurs at the sediment-water interface, and this sensitivity makes U isotopes especially relevant for the habitability of benthic animals. This Element covers the background, methods, and case studies of this promising tool for understanding Earth's environmental transitions, as rapid development continues to refine the accuracy of interpretations of 238U/235U records.

Molybdenum As A Paleoredox Proxy

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Author : Stephan R. Hlohowskyj
language : en
Publisher: Cambridge University Press
Release Date : 2021-09-09

Molybdenum As A Paleoredox Proxy written by Stephan R. Hlohowskyj and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-09 with Science categories.

Molybdenum (Mo) is a widely used trace metal for investigating redox conditions. However, unanswered questions remain that concentration and bulk isotopic analysis cannot specially answer. Improvements can be made by combining new geochemical techniques to traditional methods of Mo analysis. In this Element, we propose a refinement of Mo geochemistry within aquatic systems, ancient rocks, and modern sediments through molecular geochemistry (systematically combining concentration, isotope ratio, elemental mapping, and speciation analyses). Specifically, to intermediate sulfide concentrations governing Mo behavior below the 'switch-point' and dominant sequestration pathways in low oxygen conditions. The aim of this work is to 1) aid and improve the breadth of Mo paleoproxy interpretations by considering Mo speciation and 2) address outstanding research gaps concerning Mo systematics (cycling, partitioning, sequestration, etc.). The Mo paleoproxy has potential to solve ever complex research questions. By using molecular geochemical recommendations, improved Mo paleoproxy interpretations and reconstruction can be achieved.

Stable Isotope Geochemistry

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Author : Jochen Hoefs
language : en
Publisher: Springer
Release Date : 2018-05-05

Stable Isotope Geochemistry written by Jochen Hoefs and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-05 with Science categories.

This classic textbook is an introduction to the systematics and the use of stable isotopes in geosciences. It is subdivided into three parts: i) theoretical and experimental principles, ii) fractionation processes of light and heavy elements, iii) the natural variations of geologically important reservoirs. Since the publication of the previous edition advances in multicollector-ICP-mass-spectrometry allow precise measurements of new isotope systems. In this new edition therefore, 42 elements with resolvable natural variations in isotope composition are discussed. New findings from non-traditional isotope systems have been incorporated. Many new references have been added, which enable quick access to recent literature.

Isotopic Analysis

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Author : Frank Vanhaecke
language : en
Publisher: John Wiley & Sons
Release Date : 2012-04-24

Isotopic Analysis written by Frank Vanhaecke and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-04-24 with Science categories.

Edited by two very well-known and respected scientists in the field, this excellent practical guide is the first to cover the fundamentals and a wide range of applications, as well as showing readers how to efficiently use this increasingly important technique. From the contents: * The Isotopic Composition of the Elements * Single-Collector ICP-MS * Multi-Collector ICP-MS * Advances in Laser Ablation - Multi-Collector ICP-MS * Correction for Instrumental Mass Discrimination in Isotope Ratio Determination with Multi-Collector ICP-MS * Reference Materials in Isotopic Analysis * Quality Control in Isotope Ratio Applications * Determination of Trace Elements and Elemental Species Using Isotope Dilution ICP-MS * Geochronological Dating * Application of Multi-Collector ICP-MS to Isotopic Analysis in Cosmochemistry * Establishing the Basis for Using Stable Isotope Ratios of Metals as Paleoredox Proxies * Isotopes as Tracers of Elements Across the Geosphere-Biosphere Interface * Archaeometric Applications * Forensics Applications * Nuclear Applications * The Use of Stable Isotope Techniques for Studying Mineral and Trace Element Metabolism in Humans * Isotopic Analysis via Multi-Collector ICP-MS in Elemental Speciation A must-have for newcomers as well as established scientists seeking an overview of isotopic analysis via ICP-MS.

Micro Xrf Studies Of Sediment Cores

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Author : Ian W. Croudace
language : en
Publisher: Springer
Release Date : 2015-07-21

Micro Xrf Studies Of Sediment Cores written by Ian W. Croudace and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-07-21 with Science categories.

This volume presents papers on the use of micro-XRF core scanners in palaeoenvironmental research. It contains a broad ranging view of instrument capability and points to future developments that will help contribute to higher precision elemental data and faster core analysis. Readers will find a diverse range of research by leading experts that have used micro-XRF core scanners in a wide range of scientific applications. The book includes specific application papers reporting on the use of XRF core scanners in a variety of marine, lacustrine, and pollution studies. In addition, coverage also examines practical aspects of core scanner usage, data optimisation and data calibration and interpretation. In a little over a decade, micro-XRF sediment core scanners have made a substantive contribution to palaeoenvironmental research. Their impact is based on their ability to rapidly, non-destructively and automatically scan sediment cores. Not only do they rapidly provide important proxy data without damaging samples, but they can obtain environmental data at decadal, annual and even sub-annual scales. This volume will help both experienced and new users of these non-destructive core scanners take full advantage of one of the most powerful geochemical screening tools in the environmental scientist's toolbox.

Isotope Geochemistry

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Author : William M. White
language : en
Publisher: John Wiley & Sons
Release Date : 2023-02-13

Isotope Geochemistry written by William M. White and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-02-13 with Science categories.

ISOTOPE GEOCHEMISTRY 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 first five chapters cover fundamentals including the physics of nuclei, radioactive decay, nucleosynthesis, geochronology, and the theory of stable isotope fractionation. The next chapter focuses on the isotope geochemistry of meteorites and their constraints on the formation of the solar system and the Earth. The subsequent three chapters cover radiogenic and stable isotope geochemistry evolution of the Earth’s mantle and crust. Three more chapters are devoted to the Earth’s surface, the exogene, including the hydrologic system, the biosphere, and climate. A new chapter in this edition focuses on the use of isotopes in paleontology and archeology. The final chapter is devoted to the isotope geochemistry of the noble gases. Illustrated in full color throughout, Isotope Geochemistry is intended primarily as a textbook for advanced undergraduate and graduate students. It is also intended as a reference for earth science professionals, reflecting the impact that isotope geochemistry has on virtually every aspect of the earth sciences, from climate change and geomorphology to geodynamics.

Tracing Earth Surface Processes Using Novel Isotopic Approaches

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Author : Kang-Jun Huang
language : en
Publisher: Frontiers Media SA
Release Date : 2023-02-27

Tracing Earth Surface Processes Using Novel Isotopic Approaches written by Kang-Jun Huang and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-02-27 with Science categories.

Geochemical Signals In Dynamic Sedimentary Systems Along Continental Margins

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Author : Natascha Riedinger
language : en
Publisher: Frontiers Media SA
Release Date : 2022-05-04

Geochemical Signals In Dynamic Sedimentary Systems Along Continental Margins written by Natascha Riedinger and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-04 with Science categories.

Atmospheric Evolution On Inhabited And Lifeless Worlds

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Author : David C. Catling
language : en
Publisher: Cambridge University Press
Release Date : 2017-04-13

Atmospheric Evolution On Inhabited And Lifeless Worlds written by David C. Catling and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-04-13 with Science categories.

A comprehensive and authoritative text on the formation and evolution of planetary atmospheres, for graduate-level students and researchers.

Analytical Chemistry Of Uranium

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Author : Zeev Karpas
language : en
Publisher: CRC Press
Release Date : 2014-11-21

Analytical Chemistry Of Uranium written by Zeev Karpas and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-11-21 with Science categories.

Accurate uranium analysis, and particularly for isotope measurements, is essential in many fields, including environmental studies, geology, hydrogeology, the nuclear industry, health physics, and homeland security. This volume covers the fascinating advances in the field of analytical chemistry of uranium. Exploring a broad range of topics, the book focuses on industrial processes that involve uranium, its presence in the environment, health and biological implications of exposure to uranium compounds, and nuclear forensics. Each chapter includes an overview of the topic and several examples to demonstrate the analytical procedures. Separation and purification techniques are included where necessary.