Sulfates in Martian Layered Terrains: The OMEGA/Mars Express View

Author:

Gendrin Aline12345,Mangold Nicolas12345,Bibring Jean-Pierre12345,Langevin Yves12345,Gondet Brigitte12345,Poulet François12345,Bonello Guillaume12345,Quantin Cathy12345,Mustard John12345,Arvidson Ray12345,LeMouélic Stéphane12345

Affiliation:

1. Institut d'Astrophysique Spatiale (IAS), Bâtiment 121, 91405 Orsay Campus, France.

2. Interactions et Dynamique des Environnements de Surface (IDES), Bâtiment 509, 91405 Orsay Campus, France.

3. Laboratoire de Sciences de la Terre, Bâtiment géode, 69100 Villeurbanne, France.

4. Geological Sciences, Brown University, Providence, RI 02912, USA.

5. Earth and Planetary Sciences, Washington University, St. Louis, MO 63130, USA.

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference31 articles.

1. J.-P. Bibring et al., European Space Agency Spec. Publ.1240, 37 (2004).

2. Mars Surface Diversity as Revealed by the OMEGA/Mars Express Observations

3. Olivine and Pyroxene Diversity in the Crust of Mars

4. High spectral resolution reflectance spectroscopy of minerals

5. Band positions are given with an accuracy of 0.1 μm when the absorption bands are broad or their center is in a wavelength range with possible atmospheric residuals or in a wavelength range with possible remaining instrumental effects. Otherwise positions are given with an accuracy of 0.01 μm.

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