globalchange  > 气候减缓与适应
DOI: 10.1029/2017JE005478
Scopus记录号: 2-s2.0-85047604846
论文题名:
A Field Guide to Finding Fossils on Mars
作者: McMahon S.; Bosak T.; Grotzinger J.P.; Milliken R.E.; Summons R.E.; Daye M.; Newman S.A.; Fraeman A.; Williford K.H.; Briggs D.E.G.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期:5
起始页码: 1012
结束页码: 1040
语种: 英语
英文关键词: astrobiology ; fossils ; Mars
Scopus关键词: astronomy ; biostratigraphy ; depositional environment ; fossil ; Mars ; paleontology ; Hesperia
英文摘要: The Martian surface is cold, dry, exposed to biologically harmful radiation and apparently barren today. Nevertheless, there is clear geological evidence for warmer, wetter intervals in the past that could have supported life at or near the surface. This evidence has motivated National Aeronautics and Space Administration and European Space Agency to prioritize the search for any remains or traces of organisms from early Mars in forthcoming missions. Informed by (1) stratigraphic, mineralogical and geochemical data collected by previous and current missions, (2) Earth's fossil record, and (3) experimental studies of organic decay and preservation, we here consider whether, how, and where fossils and isotopic biosignatures could have been preserved in the depositional environments and mineralizing media thought to have been present in habitable settings on early Mars. We conclude that Noachian-Hesperian Fe-bearing clay-rich fluvio-lacustrine siliciclastic deposits, especially where enriched in silica, currently represent the most promising and best understood astropaleontological targets. Siliceous sinters would also be an excellent target, but their presence on Mars awaits confirmation. More work is needed to improve our understanding of fossil preservation in the context of other environments specific to Mars, particularly within evaporative salts and pore/fracture-filling subsurface minerals. ©2018. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113988
Appears in Collections:气候减缓与适应

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作者单位: Department of Geology and Geophysics, Yale University, New Haven, CT, United States; UK Centre for Astrobiology, School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States

Recommended Citation:
McMahon S.,Bosak T.,Grotzinger J.P.,et al. A Field Guide to Finding Fossils on Mars[J]. Journal of Geophysical Research: Planets,2018-01-01,123(5)
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