Authigenic Carbonate and the History of the Global Carbon Cycle
View/ Open
59717402.pdf (336.7Kb)
Access Status
Full text of the requested work is not available in DASH at this time ("restricted access"). For more information on restricted deposits, see our FAQ.Published Version
https://doi.org/10.1126/science.1229578Metadata
Show full item recordCitation
Schrag, Daniel P., John A. Higgins, Francis A. Macdonald, and David T. Johnston. 2013. Authigenic Carbonate and the History of the Global Carbon Cycle. Science 339, no. 6119: 540–543.Abstract
We present a framework for interpreting the carbon isotopic composition of sedimentary rocks, which in turn requires a fundamental reinterpretation of the carbon cycle and redox budgets over Earth's history. We propose that authigenic carbonate, produced in sediment pore fluids during early diagenesis, has played a major role in the carbon cycle in the past. This sink constitutes a minor component of the carbon isotope mass balance under the modern, high levels of atmospheric oxygen but was much larger in times of low atmospheric O2 or widespread marine anoxia. Waxing and waning of a global authigenic carbonate sink helps to explain extreme carbon isotope variations in the Proterozoic, Paleozoic, and Triassic.Other Sources
http://scholar.princeton.edu/ehjc/files/Schrag_et_al_2013.pdfhttp://projects.iq.harvard.edu/files/fmacdonald/files/2013_authigenic_carbonate.pdf
Citable link to this page
http://nrs.harvard.edu/urn-3:HUL.InstRepos:14081354
Collections
- FAS Scholarly Articles [18256]
Contact administrator regarding this item (to report mistakes or request changes)