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Decarboxylation of Carbon Compounds as a Potential Source for CO2 and CO Observed by SAM at Yellowknife Bay, Gale Crater, MarsMartian carbon was detected in the Sheepbed mudtsone at Yellowknife Bay, Gale Crater, Mars by the Sample Analysis at Mars (SAM) instrument onboard Curiosity, the rover of the Mars Science Laboratory missio]. The carbon was detected as CO2 thermally evolved from drilled and sieved rock powder that was delivered to SAM as a <150-micron-particle- size fraction. Most of the CO2 observed in the Cumberland (CB) drill hole evolved between 150deg and 350deg C. In the John Klein (JK) drill hole, the CO2 evolved up to 500deg C. Hypotheses for the source of the the CO2 include the breakdown of carbonate minerals reacting with HCl released from oxychlorine compounds, combustion of organic matter by O2 thermally evolved from the same oxychlorine minerals, and the decarboxylation of organic molecules indigenous to the martian rock sample. Here we explore the potential for the decarboxylation hypothesis.
Document ID
Document Type
Conference Paper
Eigenbrode, J. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bower, H. (Maryland Univ. College Park, MD, United States)
Archer, P. Jr. (Jacobs Technology, Inc. Houston, TX, United States)
Date Acquired
September 16, 2014
Publication Date
March 17, 2014
Subject Category
Lunar and Planetary Science and Exploration
Report/Patent Number
Meeting Information
Lunar and Planetary Science Conference(The Woodlands, TX)
Distribution Limits
Public Use Permitted.

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