Mars Analog Tunable Laser Spectroscopy at a Site of Active Serpentinization

Details Mars Analog Tunable Laser Spectroscopy at a Site of Active Serpentinization Mars Analog Tunable Laser Spectroscopy at a Site of Active Serpentinization

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p53c1461v&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P53C-1461

Other

1027 Composition Of The Planets, 1833 Hydroclimatology, 5220 Hydrothermal Systems And Weathering On Other Planets, 5419 Hydrology And Fluvial Processes, 6225 Mars

Scientific paper

The Tunable Laser Spectrometer (TLS) is one of three instruments (QMS, GC, TLS) that comprise the Sample Acquisition Mission (SAM) on NASA's 2009 Mars Science Laboratory (MSL). TLS has unprecedented capability for measuring methane, water and carbon dioxide abundances in the martian atmosphere and in gas evolved from heated soil samples. In addition, TLS will measure the 12C/13C isotope ratios in both CH4 and CO2 and the 16O/17O/18O isotope ratios in CO2. Comparison among atmospheric and soil isotope ratios will yield unique insight into the role of water in Mars's interior, and potentially life- sustaining fluid-rock interactions. We present measurements of methane and water isotope compositions from spring-derived gases collected at The Cedars, a site of active serpentinization, using tunable laser spectroscopy with instrumentation similar to TLS (detection at 3.27 microns for methane). A four-port absorption cell was developed for simultaneous measurements of isotopic compositions in comparison with a reference standard. We discuss implications for the origins of water and methane at the Cedars with an eye toward understanding similar systems that may exist on Mars.

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