2026-06-27T12:30:17Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/493432023-08-27T14:53:45Zcom_20.500.14352_14col_20.500.14352_15

Dohm, James M. Baker, Victor R. Boynton, William V. Fairén, Alberto G. Ferris, Justin C. Finch, Michael Furfaro, Roberto Hare, Trent M. Janes, Daniel M. Kargel, Jeffrey S. Karunatillake, Suniti Keller, John Kerry, Kris Kim, Kyeong J. Komatsu, Goro Mahaney, William C. Schulze-Makuchm, Dirk Marinangeli, Lucia Ori, Gian G. Ruiz Pérez, Javier Wheelock, Shawn J. 2023-06-20T09:24:00Z 2023-06-20T09:24:00Z 2009 0032-0633 10.1016/j.pss.2008.10.008 https://hdl.handle.net/20.500.14352/49343 http://www.elsevier.com/wps/find/journaldescription.cws_home/200/description#description The Gamma Ray Spectrometer (Mars Odyssey spacecraft) has revealed elemental distributions of potassium (K), thorium(Th), and iron (Fe) on Mars that require fractionation of K (and possibly Th and Fe) consistent with aqueous activity. This includes weathering, evolution of soils, and transport, sorting, and deposition, as well as with the location of first-order geomorphological demarcations identified as possible paleoocean boundaries. The element abundances occur in patterns consistent with weathering in situ and possible presence of relictor exhumed paleosols, deposition of weathered materials (salts and clastic minerals), and weathering/transport under neutral to acidic brines. The abundances are explained by hydrogeology consistent with the possibly over lapping alternatives of paleooceans and/or heterogeneous rock compositions from diverse provenances (e.g., differing igneous compositions). eng open access GRS evidence and the possibility of paleooceans on Mars journal article