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Soil diversity and hydration as observed by ChemCam at Gale crater, Mars

Science

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DOI: 10.1126/science.1238670

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Abstract

The ChemCam instrument, which provides insight into martian soil chemistry at the submillimeter scale, identified two principal soil types along the Curiosity rover traverse: a fine-grained mafic type and a locally derived, coarse-grained felsic type. The mafic soil component is representative of widespread martian soils and is similar in composition to the martian dust. It possesses a ubiquitous hydrogen signature in ChemCam spectra, corresponding to the hydration of the amorphous phases found in the soil by the CheMin instrument. This hydration likely accounts for an important fraction of the global hydration of the surface seen by previous orbital measurements. ChemCam analyses did not reveal any significant exchange of water vapor between the regolith and the atmosphere. These observations provide constraints on the nature of the amorphous phases and their hydration.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Soil diversity and hydration as observed by ChemCam at Gale crater, Mars
Series title:
Science
DOI:
10.1126/science.1238670
Volume
341
Issue:
6153
Year Published:
2013
Language:
English
Publisher:
American Association for the Advancement of Science
Contributing office(s):
Astrogeology Science Center
Description:
11 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science