We report here data of multiple sulfur isotopes (S-32, S-33, and S-34) measured by NanoSIMS 50L ion microprobe in Fe-Ni-Cu standards, and pyrite grains recovered from the Neoarchean Abitibi Supracrustal Terrain, Canada. Careful attention to instrument tuning, sample preparation and sample stage positioning results in highly precise and accurate data for S-32-S-33-S-34 similar to that of larger radius SIMS instruments. Our results using a multi-Faraday collection system demonstrate that the NanoSIMS 50L instrument is capable of high-precision measurements of multiple isotopes of sulfur capable of resolving mass-independent variations in S-33 (Delta S-33) on the order of 0.4 parts per thousand (2 sigma) with improvements possible with higher S count rates. Pyrite grains from the Abitibi Supracrustal terrane have a large range of delta S-34 values between -9.6 and +6.3 parts per thousand, and corresponding Delta S-33 values between -0.8 and +1.5 parts per thousand, consistent with other datasets from Neoarchean sedimentary rocks. The new data indicate the incorporation of atmospheric sulfur affected by mass-independent fractionation (MIF) of S-33 into the Neoarchean marine sulfur cycle and point to subsequent sulfate reducing microorganisms at that time. (C) 2015 Elsevier B.V. All rights reserved.
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Swedish Museum Nat Hist, SE-10405 Stockholm, Sweden
Stockholm Univ, Dept Geol Sci, SE-10691 Stockholm, SwedenBoston Univ, Dept Earth & Environm, Boston, MA 02215 USA
Whitehouse, Martin J.
;
Antonelli, Michael A.
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Univ Maryland, Dept Geol, College Pk, MD 20742 USA
Univ Maryland, ESSIC, College Pk, MD 20742 USABoston Univ, Dept Earth & Environm, Boston, MA 02215 USA
Antonelli, Michael A.
;
Farquhar, James
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Univ Maryland, Dept Geol, College Pk, MD 20742 USA
Univ Maryland, ESSIC, College Pk, MD 20742 USABoston Univ, Dept Earth & Environm, Boston, MA 02215 USA
Farquhar, James
;
Day, James M. D.
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Univ Calif San Diego, Scripps Inst Oceanog, Geosci Res Div, La Jolla, CA 92093 USABoston Univ, Dept Earth & Environm, Boston, MA 02215 USA
Day, James M. D.
;
Hauri, Erik H.
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Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USABoston Univ, Dept Earth & Environm, Boston, MA 02215 USA
机构:
Swedish Museum Nat Hist, SE-10405 Stockholm, Sweden
Stockholm Univ, Dept Geol Sci, SE-10691 Stockholm, SwedenBoston Univ, Dept Earth & Environm, Boston, MA 02215 USA
Whitehouse, Martin J.
;
Antonelli, Michael A.
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机构:
Univ Maryland, Dept Geol, College Pk, MD 20742 USA
Univ Maryland, ESSIC, College Pk, MD 20742 USABoston Univ, Dept Earth & Environm, Boston, MA 02215 USA
Antonelli, Michael A.
;
Farquhar, James
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机构:
Univ Maryland, Dept Geol, College Pk, MD 20742 USA
Univ Maryland, ESSIC, College Pk, MD 20742 USABoston Univ, Dept Earth & Environm, Boston, MA 02215 USA
Farquhar, James
;
Day, James M. D.
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机构:
Univ Calif San Diego, Scripps Inst Oceanog, Geosci Res Div, La Jolla, CA 92093 USABoston Univ, Dept Earth & Environm, Boston, MA 02215 USA
Day, James M. D.
;
Hauri, Erik H.
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Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USABoston Univ, Dept Earth & Environm, Boston, MA 02215 USA