Computer Science
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993chwe.work...10d&link_type=abstract
In Lunar and Planetary Inst., MSATT Workshop on Chemical Weathering on Mars p 10-11 (SEE N93-31933 12-91)
Computer Science
Atmospheric Composition, Evaporation, Ground Water, Mars Atmosphere, Meteoritic Composition, Mineral Deposits, Planetary Composition, Basalt, Carbon Dioxide Concentration, Weathering
Scientific paper
Previously, the effect of weathering a basalt of Shergotty meteorite composition with pure water buffered at martian atmospheric values of CO2 and O2, to place constraints upon the composition of martian groundwater, and to determine possible equilibrium mineral assemblages was calculated. A revised calculation of the composition of the aqueous phase in the weathering reaction as a function of the amount of basalt titrated into the solution is shown. The concentrations of sulfate and chloride ions increase in the solution from high water/rock ratios (w/r) on the left to low water/rock ratios on the right, until at w/r = 1, where 1 kg of basalt has been titrated, sulfate concentration is 1564 ppm and chloride is 104 ppm. This resulting fluid is dominated by sulfate and sodium, with bicarbonate and chloride at about the same concentration. This solution was evaporated in an attempt to determine if the resulting evaporite can explain the Viking XRF data. The program CHILLER was used to evaporate this solution at 0.1 C.
Debraal Jeffrey D.
Plumlee Geoffrey S.
Reed Mark H.
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