%0 Journal Article
%A Dohm, James M.
%A Baker, Victor R.
%A Boynton, William V.
%A Fairén, Alberto G.
%A Ferris, Justin C.
%A Finch, Michael
%A Furfaro, Roberto
%A Hare, Trent M.
%A Janes, Daniel M.
%A Kargel, Jeffrey S.
%A Karunatillake, Suniti
%A Keller, John
%A Kerry, Kris
%A Kim, Kyeong J.
%A Komatsu, Goro
%A Mahaney, William C.
%A Schulze-Makuchm, Dirk
%A Marinangeli, Lucia
%A Ori, Gian G.
%A Ruiz Pérez, Javier
%A Wheelock, Shawn J.
%T GRS evidence and the possibility of paleooceans on Mars
%D 2009
%@ 0032-0633
%U https://hdl.handle.net/20.500.14352/49343
%X The Gamma Ray Spectrometer (Mars Odyssey spacecraft) has revealed elemental distributions ofpotassium (K), thorium(Th), and iron (Fe) on Mars that require fractionation of K (and possibly Th andFe) 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 aspossible paleoocean boundaries. The element abundances occur in patterns consistent with weatheringin situ and possible presence of relictor exhumed paleosols, deposition of weathered materials (saltsand clastic minerals), and weathering/transport under neutral to acidic brines. The abundances areexplained by hydrogeology consistent with the possibly over lapping alternatives of paleooceans and/orheterogeneous rock compositions from diverse provenances  (e.g., differing igneous compositions).
%~