Ancient Aqueous Environments at Endeavour Crater, Mars

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Ancient Aqueous Environments at Endeavour Crater, Mars

Show simple item record Arvidson, R. E. Squyres, S. W. Bell, J. F. Catalano, J. G. Clark, B. C. Crumpler, L. S. de Souza, P. A. Fairen, A. G. Farrand, W. H. Fox, V. K. Gellert, R. Ghosh, A. Golombek, M. P. Grotzinger, J. P. Guinness, E. A. Herkenhoff, K. E. Jolliff, B. L. Knoll, Andrew Herbert Li, R. McLennan, S. M. Ming, D. W. Mittlefehldt, D. W. Moore, J. M. Morris, R. V. Murchie, S. L. Parker, T. J. Paulsen, G. Rice, J. W. Ruff, S. W. Smith, M. D. Wolff, M. J. 2014-06-17T15:53:30Z 2014
dc.identifier.citation Arvidson, R. E., S. W. Squyres, J. F. Bell, J. G. Catalano, B. C. Clark, L. S. Crumpler, P. A. de Souza, et al. 2014. Ancient Aqueous Environments at Endeavour Crater, Mars. Science 343, no. 6169: 1248097. en_US
dc.identifier.issn 0036-8075 en_US
dc.identifier.issn 1095-9203 en_US
dc.description.abstract Opportunity has investigated in detail rocks on the rim of the Noachian age Endeavour crater, where orbital spectral reflectance signatures indicate the presence of Fe+3-rich smectites. The signatures are associated with fine-grained, layered rocks containing spherules of diagenetic or impact origin. The layered rocks are overlain by breccias, and both units are cut by calcium sulfate veins precipitated from fluids that circulated after the Endeavour impact. Compositional data for fractures in the layered rocks suggest formation of Al-rich smectites by aqueous leaching. Evidence is thus preserved for water-rock interactions before and after the impact, with aqueous environments of slightly acidic to circum-neutral pH that would have been more favorable for prebiotic chemistry and microorganisms than those recorded by younger sulfate-rich rocks at Meridiani Planum. en_US
dc.description.sponsorship Earth and Planetary Sciences en_US
dc.description.sponsorship Organismic and Evolutionary Biology en_US
dc.language.iso en_US en_US
dc.publisher American Association for the Advancement of Science (AAAS) en_US
dc.relation.isversionof doi:10.1126/science.1248097 en_US
dc.relation.hasversion en_US
dash.license LAA
dc.title Ancient Aqueous Environments at Endeavour Crater, Mars en_US
dc.type Journal Article en_US
dc.description.version Accepted Manuscript en_US
dc.relation.journal Science en_US Knoll, Andrew Herbert
dash.waiver 2013-12-03 2014-06-17T15:53:30Z

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