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• W2149186546 abstract "Research Article| December 01, 2004 Weathering of iron-rich phases in simulated Martian atmospheres Vincent Chevrier; Vincent Chevrier 1Centre Européen de Recherche et d'Enseignement en Géosciences de l′Environnement, Europôle de l′Arbois, BP 80, 13545 Aix-en-Provence, cedex 04, France Search for other works by this author on: GSW Google Scholar Pierre Rochette; Pierre Rochette 1Centre Européen de Recherche et d'Enseignement en Géosciences de l′Environnement, Europôle de l′Arbois, BP 80, 13545 Aix-en-Provence, cedex 04, France Search for other works by this author on: GSW Google Scholar Pierre-Etienne Mathé; Pierre-Etienne Mathé 1Centre Européen de Recherche et d'Enseignement en Géosciences de l′Environnement, Europôle de l′Arbois, BP 80, 13545 Aix-en-Provence, cedex 04, France Search for other works by this author on: GSW Google Scholar Olivier Grauby Olivier Grauby 2Centre de Recherche en Matière Condensée et Nanosciences, Centre National de la Recherche Scientifique, Campus de Luminy, case 913, 13288 Marseille cedex 13, France Search for other works by this author on: GSW Google Scholar Author and Article Information Vincent Chevrier 1Centre Européen de Recherche et d'Enseignement en Géosciences de l′Environnement, Europôle de l′Arbois, BP 80, 13545 Aix-en-Provence, cedex 04, France Pierre Rochette 1Centre Européen de Recherche et d'Enseignement en Géosciences de l′Environnement, Europôle de l′Arbois, BP 80, 13545 Aix-en-Provence, cedex 04, France Pierre-Etienne Mathé 1Centre Européen de Recherche et d'Enseignement en Géosciences de l′Environnement, Europôle de l′Arbois, BP 80, 13545 Aix-en-Provence, cedex 04, France Olivier Grauby 2Centre de Recherche en Matière Condensée et Nanosciences, Centre National de la Recherche Scientifique, Campus de Luminy, case 913, 13288 Marseille cedex 13, France Publisher: Geological Society of America Received: 12 Aug 2004 Revision Received: 24 Aug 2004 Accepted: 31 Aug 2004 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2004) 32 (12): 1033–1036. https://doi.org/10.1130/G21078.1 Article history Received: 12 Aug 2004 Revision Received: 24 Aug 2004 Accepted: 31 Aug 2004 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Vincent Chevrier, Pierre Rochette, Pierre-Etienne Mathé, Olivier Grauby; Weathering of iron-rich phases in simulated Martian atmospheres. Geology 2004;; 32 (12): 1033–1036. doi: https://doi.org/10.1130/G21078.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract In order to simulate the weathering of primary phases likely to occur on the Martian surface, metallic iron α-Fe, magnetite, and pyrrhotite were aged in CO2 + H2O or CO2 + H2O2 atmospheres at room temperature for 1 yr. Only the magnetite remained stable during experiments; thus any magnetite on Mars is likely to be inherited from primary bedrock, whereas any metallic and most sulfide iron minerals are provided by meteoritic accretion. Metastable siderite, neoformed from α-Fe, as well as sulfates and sulfur from pyrrhotite, account for various Martian in situ observations. Stepwise color changes are related either to changes in the relative proportions of neoformed phases or to atmosphere-related changes in crystallinity, rather than to fundamental mineralogical variations of iron phases. Goethite is the main crystalline iron-bearing end product, eventually associated with ferrihydrite. If hematite is the actual dominant iron oxide that colors the Red Planet, our results imply strong changes in water activities of the primary CO2 and H2O rich atmosphere (i.e., evolution toward anhydrous conditions), or long-term evolution, for goethite to further convert into hematite. Our experiments suggest that iron weathering may have been active until recent times and would not have required bodies of liquid water. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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