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• W2091982564 endingPage "138" @default.
• W2091982564 startingPage "120" @default.
• W2091982564 abstract "To explore the linkage between mass-independent sulfur isotope fractionation (MIF-S) and δ13Corg excursions during the Neoarchean, as well as the contemporary redox state and biogeochemical cycling of carbon and sulfur, we report the results of a detailed carbon and multiple sulfur (δ34S, δ33S, δ36S) isotopic study of the ∼2.7 Ga Manjeri and ∼2.65 Ga Cheshire formations of the Ngezi Group (Belingwe Greenstone Belt, Zimbabwe). Multiple sulfur isotope data show non-zero Δ33S and Δ36S values for sediments older than 2.4 Ga (i.e. prior to the Great Oxidation Event, GOE), indicating MIF-S thought to be associated with low atmospheric oxygen concentration. However, in several 2.7–2.5 Ga Neoarchean localities, small-scale variations in MIF-S signal (magnitude) seem to correlate with negative excursion in δ13Corg, possibly reflecting a global connection between the relative reaction rate of different MIF-S source reaction and sulfur exit channels and the biogenic flux of methane into the atmosphere during periods of localized, microbiologically mediated, shallow surface-water oxygenation. The Manjeri Formation black shales studied here display a wide range of δ13Corg between −35.4‰ and −16.2‰ (average of −30.3 ± 6.0‰, 1σ), while the Cheshire Formation shales have δ13Corg between −47.7‰ and −35.1‰ (average −41.3 ± 3‰, 1σ). The δ34S values of sedimentary sulfides from Manjeri Formation vary between −15.15‰ and +2.37‰ (average −1.71 ± 4.76‰, 1σ), showing very small and mostly negative Δ33S values varying from −0.58‰ to 0.87‰ (average 0.02 ± 0.43‰, 1σ). Cheshire Formation black shale sulfide samples measured in this study have δ34S values ranging from −2.11‰ to 2.39‰ (average 0.25 ± 1.08‰, 1σ) and near zero and solely positive Δ33S anomalies between 0.14‰ and 1.17‰ (average 0.56 ± 0.29‰, 1σ). Moreover, Δ36S/Δ33S in the two formations are comparable with a slope of −1.38 (Manjeri Formation) and −1.67 (Cheshire Formation), respectively. This differs from the Archean reference line (i.e. −0.9). The sulfur and carbon isotopic signatures recorded here likely reflect different environmental conditions and/or ecosystems within the sampled Cheshire and Manjeri formations paleofacies. The differences in carbon isotopes in different sedimentological facies are interpreted as recording different metabolic pathways, including photosynthesis, methanogenesis and methanotrophy. Low δ13Corg values in the Cheshire Formation black shales suggest a strong influence of methanotrophy (likely preceded by bacterial methanogenesis), while the large range of Manjeri Formation δ34S may record bacterial sulfate reduction. The C and multiple S isotopic variations recorded here may imply different patterns of C and S fractionation, perhaps dependent on variations in the biogenic egress of methane to the atmosphere." @default.
• W2091982564 created "2016-06-24" @default.
• W2091982564 creator A5004679805 @default.
• W2091982564 creator A5013157752 @default.
• W2091982564 creator A5022624738 @default.
• W2091982564 creator A5026635723 @default.
• W2091982564 creator A5052964161 @default.
• W2091982564 date "2013-11-01" @default.
• W2091982564 modified "2023-10-09" @default.
• W2091982564 title "Multiple sulfur and carbon isotope composition of sediments from the Belingwe Greenstone Belt (Zimbabwe): A biogenic methane regulation on mass independent fractionation of sulfur during the Neoarchean?" @default.
• W2091982564 cites W1529375870 @default.
• W2091982564 cites W1538607061 @default.
• W2091982564 cites W1546386038 @default.
• W2091982564 cites W1566776431 @default.
• W2091982564 cites W1964170181 @default.
• W2091982564 cites W1965724422 @default.
• W2091982564 cites W1967250155 @default.
• W2091982564 cites W1967359802 @default.
• W2091982564 cites W1967921943 @default.
• W2091982564 cites W1969468624 @default.
• W2091982564 cites W1972576751 @default.
• W2091982564 cites W1972617139 @default.
• W2091982564 cites W1973316249 @default.
• W2091982564 cites W1974405492 @default.
• W2091982564 cites W1974924765 @default.
• W2091982564 cites W1976925845 @default.
• W2091982564 cites W1982998964 @default.
• W2091982564 cites W1986123015 @default.
• W2091982564 cites W1986579555 @default.
• W2091982564 cites W1988435801 @default.
• W2091982564 cites W1989698825 @default.
• W2091982564 cites W1990648220 @default.
• W2091982564 cites W1994046946 @default.
• W2091982564 cites W1998680662 @default.
• W2091982564 cites W1998971319 @default.
• W2091982564 cites W1999845220 @default.
• W2091982564 cites W2000538617 @default.
• W2091982564 cites W2005976476 @default.
• W2091982564 cites W2006895540 @default.
• W2091982564 cites W2007437811 @default.
• W2091982564 cites W2008281306 @default.
• W2091982564 cites W2011680274 @default.
• W2091982564 cites W2011826055 @default.
• W2091982564 cites W2012709229 @default.
• W2091982564 cites W2015783623 @default.
• W2091982564 cites W2018028106 @default.
• W2091982564 cites W2019704178 @default.
• W2091982564 cites W2022310331 @default.
• W2091982564 cites W2022397453 @default.
• W2091982564 cites W2022530129 @default.
• W2091982564 cites W2025368926 @default.
• W2091982564 cites W2026284439 @default.
• W2091982564 cites W2028145864 @default.
• W2091982564 cites W2028554965 @default.
• W2091982564 cites W2028590108 @default.
• W2091982564 cites W2030316857 @default.
• W2091982564 cites W2031096014 @default.
• W2091982564 cites W2034834320 @default.
• W2091982564 cites W2038950176 @default.
• W2091982564 cites W2040185618 @default.
• W2091982564 cites W2042372974 @default.
• W2091982564 cites W2047912772 @default.
• W2091982564 cites W2049155474 @default.
• W2091982564 cites W2050474635 @default.
• W2091982564 cites W2053767451 @default.
• W2091982564 cites W2054861741 @default.
• W2091982564 cites W2055460259 @default.
• W2091982564 cites W2056257661 @default.
• W2091982564 cites W2060427433 @default.
• W2091982564 cites W2061597318 @default.
• W2091982564 cites W2065208888 @default.
• W2091982564 cites W2068695712 @default.
• W2091982564 cites W2071510629 @default.
• W2091982564 cites W2071983566 @default.
• W2091982564 cites W2073922633 @default.
• W2091982564 cites W2074023228 @default.
• W2091982564 cites W2074064282 @default.
• W2091982564 cites W2075071049 @default.
• W2091982564 cites W2076568834 @default.
• W2091982564 cites W2081383679 @default.
• W2091982564 cites W2085786036 @default.
• W2091982564 cites W2087769129 @default.
• W2091982564 cites W2090027771 @default.
• W2091982564 cites W2091864502 @default.
• W2091982564 cites W2098244117 @default.
• W2091982564 cites W2100767171 @default.
• W2091982564 cites W2105467069 @default.
• W2091982564 cites W2119121399 @default.
• W2091982564 cites W2124967876 @default.
• W2091982564 cites W2130859746 @default.
• W2091982564 cites W2135490410 @default.
• W2091982564 cites W2136617541 @default.
• W2091982564 cites W2138286259 @default.
• W2091982564 cites W2138921237 @default.
• W2091982564 cites W2148319192 @default.
• W2091982564 cites W2152971512 @default.
• W2091982564 cites W2154652984 @default.
• W2091982564 cites W2159149515 @default.

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