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GRS evidence and the possibility of paleooceans on Mars

Planetary and Space Science

By:
, , , , , , , , , , , , , , , , , , , ,
DOI: 10.1016/j.pss.2008.10.008

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Abstract

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 relict or 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 overlapping alternatives of paleooceans and/or heterogeneous rock compositions from diverse provenances (e.g., differing igneous compositions). ?? 2008 Elsevier Ltd.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
GRS evidence and the possibility of paleooceans on Mars
Series title:
Planetary and Space Science
DOI:
10.1016/j.pss.2008.10.008
Volume
57
Issue:
5-6
Year Published:
2009
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Planetary and Space Science
First page:
664
Last page:
684
Number of Pages:
21