globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo3002
论文题名:
Large sulfur isotope fractionations in Martian sediments at Gale crater
作者: Franz H.B.; McAdam A.C.; Ming D.W.; Freissinet C.; Mahaffy P.R.; Eldridge D.L.; Fischer W.W.; Grotzinger J.P.; House C.H.; Hurowitz J.A.; McLennan S.M.; Schwenzer S.P.; Vaniman D.T.; Archer P.D.; Jr.; Atreya S.K.; Conrad P.G.; Dottin J.W.; III; Eigenbrode J.L.; Farley K.A.; Glavin D.P.; Johnson S.S.; Knudson C.A.; Morris R.V.; Navarro-González R.; Pavlov A.A.; Plummer R.; Rampe E.B.; Stern J.C.; Steele A.; Summons R.E.; Sutter B.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期:9
起始页码: 658
结束页码: 662
语种: 英语
Scopus关键词: crater ; in situ measurement ; isotopic composition ; isotopic fractionation ; Mars ; Martian atmosphere ; Martian meteorite ; sediment chemistry ; sulfur isotope
英文摘要: Variability in the sulfur isotopic composition in sediments can reflect atmospheric, geologic and biological processes. Evidence for ancient fluvio-lacustrine environments at Gale crater on Mars and a lack of efficient crustal recycling mechanisms on the planet suggests a surface environment that was once warm enough to allow the presence of liquid water, at least for discrete periods of time, and implies a greenhouse effect that may have been influenced by sulfur-bearing volcanic gases. Here we report in situ analyses of the sulfur isotopic compositions of SO2 volatilized from ten sediment samples acquired by NASA's Curiosity rover along a 13 km traverse of Gale crater. We find large variations in sulfur isotopic composition that exceed those measured for Martian meteorites and show both depletion and enrichment in 34S. Measured values of Δ34S range from - 47 ± 14‰ to 28 ± 7‰, similar to the range typical of terrestrial environments. Although limited geochronological constraints on the stratigraphy traversed by Curiosity are available, we propose that the observed sulfur isotopic signatures at Gale crater can be explained by equilibrium fractionation between sulfate and sulfide in an impact-driven hydrothermal system and atmospheric processing of sulfur-bearing gases during transient warm periods. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105722
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: NASA Goddard Space Flight Center, Greenbelt, MD, United States; NASA Johnson Space Center, Houston, TX, United States; Center for Space Science and Technology, University of Maryland, Baltimore County, Baltimore, MD, United States; Department of Geology, University of Maryland, College Park, MD, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Department of Geosciences, Pennsylvania State University, University Park, PA, United States; Department of Geosciences, Stony Brook University, Stony Brook, NY, United States; Department of Environment, Earth and Ecosystems, Open University, Milton Keynes, United Kingdom; Planetary Science Institute, Tucson, AZ, United States; Jacobs Technology, Houston, TX, United States; Department of Climate and Space Sciences, University of Michigan, Ann Arbor, MI, United States; Department of Biology, STIA, Georgetown University, Washington, DC, United States; Department of Astronomy, University of Maryland, College Park, MD, United States; Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Cuidad Universitaria, Mexico City, Mexico; Aerodyne Industries, Houston, TX, United States; Geophysical Laboratory, Carnegie Institute of Washington, Washington, DC, United States; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States

Recommended Citation:
Franz H.B.,McAdam A.C.,Ming D.W.,et al. Large sulfur isotope fractionations in Martian sediments at Gale crater[J]. Nature Geoscience,2017-01-01,10(9)
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