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Accession Number N20130009133
Title Possible Detection of Perchlorates by Evolved Gas Analysis of Rocknest Soils: Global Implication.
Publication Date 2013
Media Count 2p
Personal Author A. McAdam B. Sutter C. P. McKay D. W. Ming H. B. Franz P. D. Archer P. R. Mahaffy R. Navarro-Gonzalez
Abstract The Sample Analysis at Mars (SAM) instrument suite on board the Mars Science Laboratory (MSL) recently ran four samples from an aeolian bedform named Rocknest. Rocknest was selected as the source of the first samples analyzed because it is representative of both windblown material in Gale crater as well as the globally-distributed dust. The four samples analyzed by SAM were portioned from the fifth scoop at this location. The material delivered to SAM passed through a 150 m sieve and should have been well mixed during the sample acquisition/ preparation/handoff process. Rocknest samples were heated to approximately 835 C at a 35 C/minute ramp rate with a He carrier gas flow rate of approximately 1.5 standard cubic centimeters per minute and at an oven pressure of approximately 30 mbar. Evolved gases were detected by a quadrupole mass spectrometer (QMS).
Keywords Craters
Flow velocity
Gas analysis
Gas flow
Wind effects

Source Agency National Aeronautics and Space Administration
NTIS Subject Category 54 - Astronomy & Astrophysics
84B - Extraterrestial Exploration
Corporate Author National Aeronautics and Space Administration, Houston, TX. Lyndon B. Johnson Space Center.
Document Type Conference proceedings
Title Note N/A
NTIS Issue Number 1319
Contract Number N/A

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