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Gamma Ray Spectrometer - 2001 Mars Odyssey - Lunar and Planetary Lab - The University of Arizona

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January 2008: Hydrogen Map
January 2008: Silicon Map
January 2008: Iron Map
January 2008: Chlorine Map
January 2008: Potassium Map
January 2008: Thorium Map
March 2006: Hydrogen Map
March 2006: Silicon Map
March 2006: Iron Map
March 2006: Chlorine Map
March 2006: Potassium Map
March 2006: Thorium Map
July 2004: Global Map of Martian Hydrogen
July 2004: Map of Martian Hydrogen at the North Pole
July 2004: Potassium and Thorium Tell an Interesting Story
July 2004: Watch and Listen to Seasonal Changes in Martian Polar Ice

January, 2008: Hydrogen Map

This map shows concentration estimates of equivalent-weight water found in the regions around the equator of Mars. The map is based upon gamma ray data collected for the element hydrogen. Regions of high hydrogen concentration are shown in red while regions of low hydrogen concentration are shown in blue. The highest equatorial concentrations of hydrogen are found around and to the east of Apollineris (left and right center of map) and centered around Arabia Terra (center of map). This hydrogen may be in the form of hydrated minerals or buried ice deposits, but the former is more likely. The white sections at the top and bottom of the map represent regions of the planet with high hydrogen concentration due to large amounts of buried water ice; see July 2004 updates for maps of these regions. The locations of the five successful lander missions are marked: Viking 1 (VL1), Viking 2 (VL2), Pathfinder (PF), Spirit at Gusev (G), and Opportunity at Meridiani (M). More information about this map can be found in the recent article by Boynton, W. V., et al. (2007), Concentration of H, Si, Cl, K, Fe, and Th in the low- and mid-latitude regions of Mars . You may obtain full resolution versions of this and other elemental maps at http://grs.lpl.arizona.edu/specials/.

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