Local and Global Controls on Carbon Isotope Chemostratigraphy PDF
by Anne-Sofie (Princeton University, New Jersey) Ahm, Jon (University of Victoria, British Columbia) Husson
Part of the Elements in Geochemical Tracers in Earth System Science series
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Description
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.
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- Format:PDF
- Pages:Worked examples or Exercises
- Publisher:Cambridge University Press
- Publication Date:16/03/2022
- Category:
- ISBN:9781009033626
Information
-
Download Now
- Format:PDF
- Pages:Worked examples or Exercises
- Publisher:Cambridge University Press
- Publication Date:16/03/2022
- Category:
- ISBN:9781009033626