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Sulfate was a trace constituent of Archean seawater

Crowe, Sean A. and Paris, Guillaume and Katsev, Sergei and Jones, CarriAyne and Kim, Sang-Tae and Zerkle, Aubrey L. and Nomosatryo, Sulung and Fowle, David A. and Adkins, Jess F. and Sessions, Alex L. and Farquhar, James and Canfield, Donald E. (2014) Sulfate was a trace constituent of Archean seawater. Science, 346 (6210). pp. 735-739. ISSN 0036-8075.

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In the low-oxygen Archean world (>2400 million years ago), seawater sulfate concentrations were much lower than today, yet open questions frustrate the translation of modern measurements of sulfur isotope fractionations into estimates of Archean seawater sulfate concentrations. In the water column of Lake Matano, Indonesia, a low-sulfate analog for the Archean ocean, we find large (>20 per mil) sulfur isotope fractionations between sulfate and sulfide, but the underlying sediment sulfides preserve a muted range of δ^(34)S values. Using models informed by sulfur cycling in Lake Matano, we infer Archean seawater sulfate concentrations of less than 2.5 micromolar. At these low concentrations, marine sulfate residence times were likely 10^3 to 10^4 years, and sulfate scarcity would have shaped early global biogeochemical cycles, possibly restricting biological productivity in Archean oceans.

Item Type:Article
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URLURL TypeDescription Material
Paris, Guillaume0000-0001-8368-1224
Adkins, Jess F.0000-0002-3174-5190
Sessions, Alex L.0000-0001-6120-2763
Additional Information:© 2014 American Association for the Advancement of Science. Received for publication 21 July 2014. Accepted for publication 3 October 2014. We thank A. Sturm and C. Henny for help with fieldwork. S. Poulton provided sediment δ^(34)S data. A. Hefford helped compile Archean S-isotope data. Funding to S.A.C. was provided by an Agouron Institute Geobiology Fellowship and a Natural Sciences and Engineering Research Council of Canada Postdoctoral Fellowship. Additional funding was provided by the Danish National Research Foundation (grant no. DNRF53) and the European Research Council. All data are available in the supplementary materials.
Funding AgencyGrant Number
Agouron InstituteUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Danish National Research FoundationDNRF53
European Research Council (ERC)UNSPECIFIED
Issue or Number:6210
Record Number:CaltechAUTHORS:20141009-162752745
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Official Citation:Sulfate was a trace constituent of Archean seawater Sean A. Crowe, Guillaume Paris, Sergei Katsev, CarriAyne Jones, Sang-Tae Kim, Aubrey L. Zerkle, Sulung Nomosatryo, David A. Fowle, Jess F. Adkins, Alex L. Sessions, James Farquhar, and Donald E. Canfield Science 7 November 2014: 346 (6210), 735-739. [DOI:10.1126/science.1258966]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50324
Deposited By: George Porter
Deposited On:06 Nov 2014 19:46
Last Modified:09 Mar 2020 13:19

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