This data set contains Odyssey GRS element concentration maps and underlying data for various elements, including chlorine, iron, water, potassium, silicon, and thorium.

 
Citation Boynton, W.V., 2001 Mars Odyssey Gamma Ray Spectrometer Element Concentration Data, NASA Planetary Data System, ODY-M-GRS-5-ELEMENTS-V1.0, 2007.
Digital Object Identifier (DOI) 10.17189/1519480
Data Set Abstract The ODY MARS GAMMA RAY SPECTROMETER 5 ELEMENTS data set consists of a set of maps and underlying data products originally released to the public in March 2006. They contain data that was collected by the 2001 Mars Odyssey Gamma-ray Spectrometer between June 4, 2002 and April 3, 2005. These data are highly processed, and represent the fully corrected, CO2 frost free elemental concentrations. Data for all non-radioactive species have been masked to exclude polar regions where we currently cannot adequately deal with dilution by the large amounts of water ice.
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    Additional Information
    Mission Information 2001 MARS ODYSSEY
    Data Set Information ODY-M-GRS-5-ELEMENTS-V1.0
    Instrument Host Information ODY
    Instrument Information GRS
    Target Information MARS