The Opportunity Rover's Athena Science Investigation at Meridiani Planum, Mars

Autor:	Harry Y. McSween, J. Brückner, Wendy M. Calvin, William M. Folkner, Scott M. McLennan, J. W. Rice, G. Landis, Matthew P. Golombek, Philip R. Christensen, R. Li, David J. Des Marais, Jeffrey E. Moersch, Steven W. Squyres, Paul S. Smith, John A. Grant, Göstar Klingelhöfer, James F. Bell, Jeffrey R. Johnson, Thanasis E. Economou, Kenneth E. Herkenhoff, Heinrich Wänke, Michael C. Malin, Jack D. Farmer, Laurence A. Soderblom, N. A. Cabrol, Benton C. Clark, John P. Grotzinger, Morten Madsen, Ronald Greeley, Michael H. Carr, Claude d’Uston, T. J. Parker, M. Sims, S. P. Gorevan, M. J. Wolff, Thomas J. Wdowiak, Stubbe F. Hviid, M. D. Smith, Andrew H. Knoll, Albert S. Yen, Mark T. Lemmon, Rudolf Rieder, Larry S. Crumpler, William H. Farrand, Larry A. Haskin, D. W. Ming, Ryan C. Sullivan, Raymond E. Arvidson, Richard V. Morris, Lutz Richter
Rok vydání:	2004
Předmět:	Meridiani Planum Geologic Sediments Minerals Multidisciplinary Extraterrestrial Environment Atmosphere Silicates Geochemistry Mars Water Mineralogy Wind Mars Exploration Program engineering.material Ferric Compounds Diagenesis Impact crater Concretion engineering Siliciclastic Sedimentary rock Composition of Mars Spacecraft Evolution Planetary Geology
Zdroj:	Science. 306:1698-1703
ISSN:	1095-9203 0036-8075
Popis:	The Mars Exploration Rover Opportunity has investigated the landing site in Eagle crater and the nearby plains within Meridiani Planum. The soils consist of fine-grained basaltic sand and a surface lag of hematite-rich spherules, spherule fragments, and other granules. Wind ripples are common. Underlying the thin soil layer, and exposed within small impact craters and troughs, are flat-lying sedimentary rocks. These rocks are finely laminated, are rich in sulfur, and contain abundant sulfate salts. Small-scale cross-lamination in some locations provides evidence for deposition in flowing liquid water. We interpret the rocks to be a mixture of chemical and siliciclastic sediments formed by episodic inundation by shallow surface water, followed by evaporation, exposure, and desiccation. Hematite-rich spherules are embedded in the rock and eroding from them. We interpret these spherules to be concretions formed by postdepositional diagenesis, again involving liquid water.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0eaea9ecb0f58142cf87bb8b31a2b009 https://doi.org/10.1126/science.1106171 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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