Effect of evaporite deposition on Early Cretaceous carbon and sulphur cycling

Ulrich G. Wortmann () and Boris M. Chernyavsky
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Ulrich G. Wortmann: Geobiology Isotope Laboratory, University of Toronto, 22 Russell Street, Toronto, Ontario, M5S 3B1, Canada
Boris M. Chernyavsky: Geobiology Isotope Laboratory, University of Toronto, 22 Russell Street, Toronto, Ontario, M5S 3B1, Canada

Nature, 2007, vol. 446, issue 7136, 654-656

Abstract: The rates at which organic matter and pyrites were buried in marine sediments seem to have been inversely related during the Early Cretaceous period, in comparison to modern sediments. This puzzling relationship could be due to the deposition of evaporites during the opening of the South Atlantic basin, as this event removed enough sulphate from the ocean to significantly reduce the rates of pyrite formation and organic matter breakdown by bacteria.

Date: 2007
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DOI: 10.1038/nature05693

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