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Volatile and organic compositions of sedimentary rocks in Yellowknife Bay, Gale crater, Mars

Science

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DOI: 10.1126/science.1245267

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Abstract

H2O, CO2, SO2, O2, H2, H2S, HCl, chlorinated hydrocarbons, NO, and other trace gases were evolved during pyrolysis of two mudstone samples acquired by the Curiosity rover at Yellowknife Bay within Gale crater, Mars. H2O/OH-bearing phases included 2:1 phyllosilicate(s), bassanite, akaganeite, and amorphous materials. Thermal decomposition of carbonates and combustion of organic materials are candidate sources for the CO2. Concurrent evolution of O2 and chlorinated hydrocarbons suggests the presence of oxychlorine phase(s). Sulfides are likely sources for sulfur-bearing species. Higher abundances of chlorinated hydrocarbons in the mudstone compared with Rocknest windblown materials previously analyzed by Curiosity suggest that indigenous martian or meteoritic organic carbon sources may be preserved in the mudstone; however, the carbon source for the chlorinated hydrocarbons is not definitively of martian origin.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Volatile and organic compositions of sedimentary rocks in Yellowknife Bay, Gale crater, Mars
Series title:
Science
DOI:
10.1126/science.1245267
Volume
343
Issue:
6169
Year Published:
2014
Language:
English
Publisher:
American Association for the Advancement of Science
Contributing office(s):
Astrogeology Science Center
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Other Geospatial:
Gale Crater;Mars;Yellowknife Bay