Local and Global Controls on Carbon Isotope Chemostratigraphy by Anne-Sofie Ahm

Local and Global Controls on Carbon Isotope Chemostratigraphy by Anne-Sofie Ahm

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.

SKU	Unavailable
ISBN 13	9781009013956
ISBN 10	1009013955
Title	Local and Global Controls on Carbon Isotope Chemostratigraphy
Author	Anne-Sofie Ahm
Series	Elements In Geochemical Tracers In Earth System Science
Condition	Unavailable
Binding Type	Paperback
Publisher	Cambridge University Press
Year published	2022-03-31
Number of pages	75
Cover note	Book picture is for illustrative purposes only, actual binding, cover or edition may vary.