Water on Mars: The View From Geochemical Analyses of Martian Meteorites

Details Water on Mars: The View From Geochemical Analyses of Martian Meteorites Water on Mars: The View From Geochemical Analyses of Martian Meteorites

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p12e..01l&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #P12E-01

Other

1060 Planetary Geochemistry (5405, 5410, 5704, 5709, 6005, 6008), 3662 Meteorites, 5405 Atmospheres: Composition And Chemistry, 5480 Volcanism (8450), 6225 Mars

Scientific paper

Studies of the Martian Meteorites have provided extremely valuable information on the origin, evolution, and interaction of Martian volatile reservoirs. In this review talk, I will discuss several recent works on Martian Meteorite geochemistry that result in new views of water on Mars. Interesting recent results to be discussed include: (1) Analyses of rare earth elements such as Eu indicate that the mantle of Mars is significantly more reducing than the crust, (2) analyses of trace Be, B and others suggest that martian magmas carried significantly more water to the near-surface than previously thought, and (3) hydrogen isotopic analyses of magmatic hydrous minerals indicate that the amount of water lost from Mars via atmospheric escape is significantly less than previously supposed. All of these works point to a Mars in which water has played a important role in the crust in the past, and could continue to have a significant presence even today. These studies provide views that are complimentary to, and generally consistent with the new views of the Martian water cycle from spacecraft data, excepting perhaps the paucity of secondary minerals observed by the thermal emission spectrometer aboard MGS. Ultimately, returning samples of the Martian crust to terrestrial laboratories will be required to fully integrate results from remote sensing observations with laboratory geochemical analyses of Martian Meteorites.

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