RT Journal Article
T1 GRS evidence and the possibility of paleooceans on Mars
A1 Dohm, James M.
A1 Baker, Victor R.
A1 Boynton, William V.
A1 Fairén, Alberto G.
A1 Ferris, Justin C.
A1 Finch, Michael
A1 Furfaro, Roberto
A1 Hare, Trent M.
A1 Janes, Daniel M.
A1 Kargel, Jeffrey S.
A1 Karunatillake, Suniti
A1 Keller, John
A1 Kerry, Kris
A1 Kim, Kyeong J.
A1 Komatsu, Goro
A1 Mahaney, William C.
A1 Schulze-Makuchm, Dirk
A1 Marinangeli, Lucia
A1 Ori, Gian G.
A1 Ruiz Pérez, Javier
A1 Wheelock, Shawn J.
AB 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).
PB Elsevier
SN 0032-0633
YR 2009
FD 2009
LK https://hdl.handle.net/20.500.14352/49343
UL https://hdl.handle.net/20.500.14352/49343
LA eng
DS Docta Complutense
RD 15 may 2024