Author: Marcus RegenbergPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Inorganic and Stable Isotope Geochemistry of Tropical Atlantic, Caribbean Planktonic Foraminifera
Author: Marcus RegenbergMorphological Variation, Diversity and Stable Isotope Geochemistry of Recent Planktonic Foraminifera from the North Atlantic
Author: Alan David HechtPublisher:
ISBN:
Category : Foraminifera
Languages : en
Pages : 444
Book Description
Ecology and Stable Isotope Geochemistry of Modern Planktonic Foraminifera in the Northeast Atlantic
Author: Andreia Seia RebotimHandbook of Environmental Isotope Geochemistry
Author: Mark BaskaranPublisher: Springer Science & Business Media
ISBN: 3642106374
Category : Science
Languages : en
Pages : 944
Book Description
Applications of radioactive and stable isotopes have revolutionized our understanding of the Earth and near-earth surface processes. The utility of the isotopes are ever-increasing and our sole focus is to bring out the applications of these isotopes as tracers and chronometers to a wider audience so that they can be used as powerful tools to solve environmental problems. New developments in this field remain mostly in peer-reviewed journal articles and hence our goal is to synthesize these findings for easy reference for students, faculty, regulators in governmental and non-governmental agencies, and environmental companies. While this volume maintains its rigor in terms of its depth of knowledge and quantitative information, it contains the breadth needed for wide variety problems and applications in the environmental sciences. This volume presents all of the newer and older applications of isotopes pertaining to the environmental problems in one place that is readily accessible to readers. This book not only has the depth and rigor that is needed for academia, but it has the breadth and case studies to illustrate the utility of the isotopes in a wide variety of environments (atmosphere, oceans, lakes, rivers and streams, terrestrial environments, and sub-surface environments) and serves a large audience, from students and researchers, regulators in federal, state and local governments, and environmental companies.
The Oceans and Marine Geochemistry
Author: H. ElderfieldPublisher: Elsevier
ISBN: 9780080451015
Category : Business & Economics
Languages : en
Pages : 668
Book Description
The Treatise on Geochemistry is the first work providing a comprehensive, integrated summary 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.
Isotope Geochemistry
Author: Heinrich D HollandPublisher: Academic Press
ISBN: 0080967116
Category : Science
Languages : en
Pages : 750
Book Description
After the discovery that elements were commonly composed of isotopes, there developed a range of studies of the variability of isotopic compositions in Earth materials, which was able to add to our understanding of Earth processes and history. This collection of chapters from the Treatise on Geochemistry describes the range of isotopic studies. The chapters are grouped into the following categories: light stable isotopes, radiogenic tracers, noble gases and radioactive tracers. The first three groups depend on mass spectrometric measurements. The section on radioactive tracers employs both radioactive counting techniques and the newly developed accelerator mass spectrometric techniques. Comprehensive, interdisciplinary and authoritative content selected by leading subject experts Robust illustrations, figures and tables Affordably priced sampling of content from the full Treatise on Geochemistry
Reconstructing Tropital Atlantic Climate from Mg?Ca and Oxygen Isotopes of Planktonic Foraminifera
Author: Emma FarmerEnvironmental Isotopes in Biodegradation and Bioremediation
Author: C. Marjorie AelionPublisher: CRC Press
ISBN: 1420012614
Category : Science
Languages : en
Pages : 466
Book Description
Enhanced analytical capabilities and separation techniques, improved detection limits, and accessibility of instrumentation have led to massive strides in the use of isotopes to assess microbial processes in surface and subsurface sediments. Considering the rapid growth of research and commercial interest in stable isotope and radioisotope applicat
Geochemical Signals in Fossil Planktonic Foraminifera
Author: Rehemat BhatiaPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The stable isotope and trace element geochemistry of planktonic foraminifera is commonly used to reconstruct palaeoclimatic and palaeoceanographic parameters across recent and deeper timescales. However, aspects of their ecology, such as photosymbiont presence, ontogenetic growth and depth habitats, are suggested to alter these proxy signatures. Ecologies are additionally thought to change through time, creating further complications. Therefore, constraining foraminiferal palaeoecology, particularly during epochs which aid us in understanding future climate, is vital, to validate any proxy signals obtained. Two such epochs are the Eocene and Miocene, characterised by temperatures and CO2 levels comparable to a future warmer world. Many species within these periods have unresolved palaeoecologies. This thesis investigates the palaeoecology of multiple Eocene and Miocene planktonic foraminiferal species (from sites with well-preserved specimens) with unresolved palaeoecologies, using IÌ‚ Ì 13C, IÌ‚ Ì 18O, Mg/Ca, Sr/Ca and B/Ca. Whole and intra"â€shell geochemistry is investigated, using a combination of isotope ratio mass spectrometry and high resolution analytical techniques (laser ablation inductively coupled plasma mass spectrometry, electron microprobe analysis). It is shown for the first time that intra-chamber and size-segregated trace element/Ca data do not vary between Eocene foraminiferal species with differing ecologies (except Globigerina cf. bulloides and Pseudohastigerina wilcoxensis). Eocene and Miocene species EMPA data exhibit intra-shell Mg heterogeneity between species with varying depth habitats and photosymbiotic partnerships. Combining EMPA data with size-segregated IÌ‚ Ì 13C data is shown to be beneficial in distinguishing photosymbiotic species. Lastly, size-segregated IÌ‚ Ì 13C data from the species Globigerinatheka index indicate that it is possible for planktonic foraminifera to facultatively host photosymbionts in response to unfavourable environmental conditions. Having constrained the ecologies of various Eocene species, discrepancies between their inorganic proxy data are revealed and discussed. Overall, this thesis amplifies the importance of disentangling foraminiferal palaeoecology before constructing long-term downcore records, to mitigate the issues which vital effects can create.
Author: Anne Boersma