Sulfates in the North Polar Region of Mars Detected by OMEGA/Mars Express

Details Sulfates in the North Polar Region of Mars Detected by OMEGA/Mars Express Sulfates in the North Polar Region of Mars Detected by OMEGA/Mars Express

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sci...307.1584l&link_type=abstract

Science, Volume 307, Issue 5715, pp. 1584-1586 (2005).

Physics

165

Scientific paper

The Observatoire pour la Minéralogie, l'Eau, les Glaces, et l'Activité (OMEGA) imaging spectrometer observed the northern circumpolar regions of Mars at a resolution of a few kilometers. An extended region at 240°E, 85°N, with an area of 60 kilometers by 200 kilometers, exhibits absorptions at wavelengths of 1.45, 1.75, 1.94, 2.22, 2.26, and 2.48 micrometers. These signatures can be unambiguously attributed to calcium-rich sulfates, most likely gypsum. This region corresponds to the dark longitudinal dunes of Olympia Planitia. These observations reveal that water alteration played a major role in the formation of the constituting minerals of northern circumpolar terrains.

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