气候变化领域集成服务门户(CCPortal): Explaining the structure of the archean mass-independent sulfur isotope record

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DOI	10.1126/science.1190298
	Explaining the structure of the archean mass-independent sulfur isotope record
	Halevy I.; Johnston D.T.; Schrag D.P.
发表日期	2010
ISSN	0036-8075
起始页码	204
结束页码	207
卷号	329 期号:5988
英文摘要	Sulfur isotopes in ancient sediments provide a record of past environmental conditions. The long-time-scale variability and apparent asymmetry in the magnitude of minor sulfur isotope fractionation in Archean sediments remain unexplained. Using an integrated biogeochemical model of the Archean sulfur cycle, we find that the preservation of mass-independent sulfur is influenced by a variety of extra-atmospheric mechanisms, including biological activity and continental crust formation. Preservation of atmospherically produced mass-independent sulfur implies limited metabolic sulfur cycling before ~2500 million years ago; the asymmetry in the record indicates that bacterial sulfate reduction was geochemically unimportant at this time. Our results suggest that the large-scale structure of the record reflects variability in the oxidation state of volcanic sulfur volatiles.
英文关键词	sulfur; Archean; atmospheric dynamics; bacterium; bioactivity; biogeochemical cycle; environmental conditions; isotopic fractionation; microbial activity; oxidation; paleoenvironment; sediment analysis; sulfur isotope; Archean; article; atmosphere; biogeochemical cycle; oxidation; priority journal; sediment; Atmosphere; Bacteria; Evolution, Planetary; Geologic Sediments; Iron; Models, Theoretical; Oceans and Seas; Oxidation-Reduction; Photolysis; Seawater; Sulfates; Sulfides; Sulfur; Sulfur Dioxide; Sulfur Isotopes; Time; Volcanic Eruptions; Bacteria (microorganisms)
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243919
作者单位	Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States
推荐引用方式 GB/T 7714	Halevy I.,Johnston D.T.,Schrag D.P.. Explaining the structure of the archean mass-independent sulfur isotope record[J],2010,329(5988).
APA	Halevy I.,Johnston D.T.,&Schrag D.P..(2010).Explaining the structure of the archean mass-independent sulfur isotope record.Science,329(5988).
MLA	Halevy I.,et al."Explaining the structure of the archean mass-independent sulfur isotope record".Science 329.5988(2010).