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Science. 2005 Mar 11;307(5715):1587-91. Epub 2005 Feb 17.

Sulfates in Martian layered terrains: the OMEGA/Mars Express view.

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  • 1Institut d'Astrophysique Spatiale (IAS), Bâtiment 121, 91405 Orsay Campus, France. Aline_Gendrin@brown.edu

Abstract

The OMEGA/Mars Express hyperspectral imager identified hydrated sulfates on light-toned layered terrains on Mars. Outcrops in Valles Marineris, Margaritifer Sinus, and Terra Meridiani show evidence for kieserite, gypsum, and polyhydrated sulfates. This identification has its basis in vibrational absorptions between 1.3 and 2.5 micrometers. These minerals constitute direct records of the past aqueous activity on Mars.

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