Local and Global Controls on Carbon Isotope Chemostratigraphy

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Anne-Sofie Ahm (Princeton University, New Jersey) Jon Husson (University of Victoria, British Columbia)

Local and Global Controls on Carbon Isotope Chemostratigraphy

Anne-Sofie Ahm (Princeton University, New Jersey), Jon Husson (University of Victoria, British Columbia)

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English

Cambridge University Press
31 March 2022

Earth sciences; Geology & the lithosphere; Geochemistry; Oceanography (seas); Meteorology & climatology

Series: Elements in Geochemical Tracers in Earth System Science

Over million-year timescales, the geologic cycling of carbon controls long-term climate and the oxidation of Earth's surface. Inferences about the carbon cycle can be made from time series of carbon isotopic ratios measured from sedimentary rocks. The foundational assumption for carbon isotope chemostratigraphy is that carbon isotope values reflect dissolved inorganic carbon in a well-mixed ocean in equilibrium with the atmosphere. However, when applied to shallow-water platform environments, where most ancient carbonates preserved in the geological record formed, recent research has documented the importance of considering both local variability in surface water chemistry and diagenesis. These findings demonstrate that carbon isotope chemostratigraphy of platform carbonate rarely represent the average carbonate sink or directly records changes in the composition of global seawater. Understanding what causes local variability in shallow-water settings, and what this variability might reveal about global boundary conditions, are vital questions for the next generation of carbon isotope chemostratigraphers.

By: Anne-Sofie Ahm (Princeton University New Jersey), Jon Husson (University of Victoria, British Columbia)
Imprint: Cambridge University Press
Country of Publication: United Kingdom
Edition: New edition
Dimensions: Height: 228mm, Width: 152mm, Spine: 3mm
Weight: 85g
ISBN: 9781009013956
ISBN 10: 1009013955
Series: Elements in Geochemical Tracers in Earth System Science
Pages: 75
Publication Date: 31 March 2022
Audience: General/trade , ELT Advanced
Format: Paperback
Publisher's Status: Active

1. Introduction; 2. Systematics of carbon isotope chemostratigraphy; 3. Local controls and issues of fidelity and diagenesis; 4. Case studies; 5. Future prospects; 6. Designated key papers.