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- W2054380694 endingPage "77" @default.
- W2054380694 startingPage "74" @default.
- W2054380694 abstract "The composition of sulfur isotopes in sedimentary sulfides and sulfates traces the sulfur cycle throughout Earth's history. In particular, depletions of sulfur-34 ((34)S) in sulfide relative to sulfate exceeding 47 per mil (‰) often serve as a proxy for the disproportionation of intermediate sulfur species in addition to sulfate reduction. Here, we demonstrate that a pure, actively growing culture of a marine sulfate-reducing bacterium can deplete (34)S by up to 66‰ during sulfate reduction alone and in the absence of an extracellular oxidative sulfur cycle. Therefore, similar magnitudes of sulfur isotope fractionation in sedimentary rocks do not unambiguously record the presence of other sulfur-based metabolisms or the stepwise oxygenation of Earth's surface environment during the Proterozoic." @default.
- W2054380694 created "2016-06-24" @default.
- W2054380694 creator A5019668167 @default.
- W2054380694 creator A5039835734 @default.
- W2054380694 creator A5071234646 @default.
- W2054380694 date "2011-07-01" @default.
- W2054380694 modified "2023-09-30" @default.
- W2054380694 title "Large Sulfur Isotope Fractionation Does Not Require Disproportionation" @default.
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