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Accession Number N20130009135
Title Hydrogen Isotopic Composition of Water in the Martian Atmosphere and Released from Rocknest Fines.
Publication Date 2013
Media Count 2p
Personal Author A. C. McAdam B. Sutter C. R. Webster D. W. Ming G. J. Flesh H. B. Franz J. C. Stern J. H. Jones L. A. Leshin L. E. Christensen P. Conrad P. B. Archer P. B. Niles P. R. Mahaffy S. K. Atreya T. C. Owen
Abstract The Mars Science Laboratory Curiosity rover sampled the aeolian bedform called Rocknest as its first solid samples to be analyzed by the analytical instruments CheMin and SAM. The instruments ingested aliquots from a sieved sample of less than 150 micrometer grains. As discussed in other reports at this conference (e.g., 1), CheMin discovered many crystalline phases, almost all of which are igneous minerals, plus some 10s of percent of x-ray amorphous material. The SAM instrument is focused on understanding volatiles and possible organics in the fines, performing evolved gas analysis (EGA) with the SAM quadrapole mass spectrometer (QMS), isotope measurements using both the QMS and the tunable laser spectrometer (TLS), which is sensitive to CO2, water and methane, and organics with the gas chromatograph mass spectrometer (GCMS). As discussed in the abstract by Franz et al. (2) and others, EGA of Rocknest fines revealed the presence of significant amounts of H2O as well as O-, C- and S-bearing materials. SAM has also tasted the martian atmosphere several times, analyzing the volatiles in both the TLS and QMS (e.g., 3,4). This abstract will focus on presentation of initial hydrogen isotopic data from the TLS for Rocknest soils and the atmosphere, and their interpretation. Data for CO2 isotopes and O isotopes in water are still being reduced, but should be available by at the conference.
Keywords Amorphous materials
Carbon dioxide
Hydrogen isotopes
Laser spectrometers
Mars atmosphere
Mars science laboratory
Oxygen isotopes
Soil sampling

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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