Stability of hydrated minerals on Mars
The validity of recent identification of various hydrated minerals (kieserite, gypsum, hexahydrite, nontronite, chamosite, and montmorillonite) on Mars was assessed by exposing these minerals to simulated Martian surface conditions of atmospheric composition and pressure, temperature, and ultraviole...
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Published in | Geophysical research letters Vol. 34; no. 20; pp. L20202 - n/a |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Geophysical Union
01.10.2007
Blackwell Publishing Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | The validity of recent identification of various hydrated minerals (kieserite, gypsum, hexahydrite, nontronite, chamosite, and montmorillonite) on Mars was assessed by exposing these minerals to simulated Martian surface conditions of atmospheric composition and pressure, temperature, and ultraviolet light irradiation. When exposed to such conditions the hydrated minerals exhibit in general, greater losses of interlayer H2O than structural OH. Minerals such as gypsum that contain structural H2O are more resistant to H2O loss than phyllosilicates. The partial loss of OH in some of the phyllosilicates is not accompanied by a measurable and systematic change in the wavelength position or intensity of metal‐OH absorption bands. The characteristic absorption features that allow for identification of these minerals on Mars may be reduced in intensity, but are nevertheless largely preserved. |
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Bibliography: | ArticleID:2007GL031267 ark:/67375/WNG-DHDQCNPB-8 istex:8831741C8CB16454F8E3C6F525CA284D84665F6C ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0094-8276 1944-8007 |
DOI: | 10.1029/2007GL031267 |