Sulfates in the north polar region of Mars detected by OMEGA/Mars Express.
Science
; 307(5715): 1584-6, 2005 Mar 11.
Article
in En
| MEDLINE
| ID: mdl-15718428
ABSTRACT
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 degrees E, 85 degrees 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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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sulfates
/
Calcium Sulfate
/
Mars
Language:
En
Journal:
Science
Year:
2005
Document type:
Article
Affiliation country: