DOI: 10.1038/ngeo1706
论文题名: Groundwater activity on Mars and implications for a deep biosphere
作者: Michalski J.R. ; Cuadros J. ; Niles P.B. ; Parnell J. ; Deanne Rogers A. ; Wright S.P.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 2 起始页码: 133
结束页码: 138
语种: 英语
Scopus关键词: biosphere
; clay
; crater
; groundwater flow
; Mars
; microbial community
; photosynthesis
; planetary surface
; subterranean environment
; sulfate
; surficial sediment
; Eukaryota
英文摘要: By the time eukaryotic life or photosynthesis evolved on Earth, the martian surface had become extremely inhospitable, but the subsurface of Mars could potentially have contained a vast microbial biosphere. Crustal fluids may have welled up from the subsurface to alter and cement surface sediments, potentially preserving clues to subsurface habitability. Here we present a conceptual model of subsurface habitability of Mars and evaluate evidence for groundwater upwelling in deep basins. Many ancient, deep basins lack evidence for groundwater activity. However, McLaughlin Crater, one of the deepest craters on Mars, contains evidence for Mg-Fe-bearing clays and carbonates that probably formed in an alkaline, groundwater-fed lacustrine setting. This environment strongly contrasts with the acidic, water-limited environments implied by the presence of sulphate deposits that have previously been suggested to form owing to groundwater upwelling. Deposits formed as a result of groundwater upwelling on Mars, such as those in McLaughlin Crater, could preserve critical evidence of a deep biosphere on Mars. We suggest that groundwater upwelling on Mars may have occurred sporadically on local scales, rather than at regional or global scales. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106860
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: Department of Earth Sciences, Natural History Museum, London SW7 5BD, United Kingdom; Planetary Science Institute, 1700 E. Fort Lowell, Tucson, AZ 85719, United States; NASA Johnson Space Center, Houston, TX 77058, United States; University of Aberdeen, Aberdeen AB24 3UE, United Kingdom; SUNY Stony Brook, Stony Brook, NY 11794, United States; Auburn University, Auburn, AL 36849, United States
Recommended Citation:
Michalski J.R.,Cuadros J.,Niles P.B.,et al. Groundwater activity on Mars and implications for a deep biosphere[J]. Nature Geoscience,2013-01-01,6(2)