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DOI | 10.1038/s41561-019-0458-8 |
An interval of high salinity in ancient Gale crater lake on Mars | |
Rapin, W.1; Ehlmann, B. L.1,2; Dromart, G.3; Schieber, J.4; Thomas, N. H.1; Fischer, W. W.1; Fox, V. K.1; Stein, N. T.1; Nachon, M.5; Clark, B. C.6; Kah, L. C.7; Thompson, L.8; Meyer, H. A.1; Gabriel, T. S. J.9; Hardgrove, C.9; Mangold, N.10; Rivera-Hernandez, F.11; Wiens, R. C.12; Vasavada, A. R.2 | |
2019-11-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:11页码:889-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France; Canada |
英文摘要 | Precipitated minerals, including salts, are primary tracers of atmospheric conditions and water chemistry in lake basins. Ongoing in situ exploration by the Curiosity rover of Hesperian (around 3.3-3.7 Gyr old) sedimentary rocks within Gale crater on Mars has revealed clay-bearing fluvio-lacustrine deposits with sporadic occurrences of sulfate minerals, primarily as late-stage diagenetic veins and concretions. Here we report bulk enrichments, disseminated in the bedrock, of 30-50 wt% calcium sulfate intermittently over about 150 m of stratigraphy, and of 26-36 wt% hydrated magnesium sulfate within a thinner section of strata. We use geochemical analysis, primarily from the ChemCam laser-induced breakdown spectrometer, combined with results from other rover instruments, to characterize the enrichments and their lithology. The deposits are consistent with early diagenetic, pre-compaction salt precipitation from brines concentrated by evaporation, including magnesium sulfate-rich brines from extreme evaporative concentration. This saline interval represents a substantial hydrological perturbation of the lake basin, which may reflect variations in Mars' obliquity and orbital parameters. Our findings support stepwise changes in Martian climate during the Hesperian, leading to more arid and sulfate-dominated environments as previously inferred from orbital observations. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493905700008 |
WOS关键词 | INDUCED BREAKDOWN SPECTROSCOPY ; CHEMCAM INSTRUMENT SUITE ; MAGNESIUM-SULFATE ; CALCIUM-SULFATE ; PAHRUMP HILLS ; IDENTIFICATION ; CHEMISTRY ; ROCKS ; PRECIPITATION ; STRATIGRAPHY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/223758 |
专题 | 地球科学 气候变化 |
作者单位 | 1.CALTECH, Pasadena, CA 91125 USA; 2.CALTECH, Jet Prop Lab, Pasadena, CA USA; 3.Univ Lyon, Lab Geol Lyon, Lyon, France; 4.Indiana Univ, Bloomington, IN USA; 5.Texas A&M Univ, College Stn, TX USA; 6.Space Sci Inst, Boulder, CO USA; 7.Univ Tennessee, Knoxville, TN USA; 8.Univ New Brunswick, Fredericton, NB, Canada; 9.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ USA; 10.Univ Angers, Univ Nantes, CNRS, Lab Planetol & Geodynam,UMR6112, Nantes, France; 11.Dartmouth Coll, Hanover, NH 03755 USA; 12.Los Alamos Natl Lab, Los Alamos, NM USA |
推荐引用方式 GB/T 7714 | Rapin, W.,Ehlmann, B. L.,Dromart, G.,et al. An interval of high salinity in ancient Gale crater lake on Mars[J]. NATURE GEOSCIENCE,2019,12(11):889-+. |
APA | Rapin, W..,Ehlmann, B. L..,Dromart, G..,Schieber, J..,Thomas, N. H..,...&Vasavada, A. R..(2019).An interval of high salinity in ancient Gale crater lake on Mars.NATURE GEOSCIENCE,12(11),889-+. |
MLA | Rapin, W.,et al."An interval of high salinity in ancient Gale crater lake on Mars".NATURE GEOSCIENCE 12.11(2019):889-+. |
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