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Computer modeling of the mineralogy of the Martian surface, as modified by aqueous alterationMineralogical constraints can be placed on the Martian surface by assuming chemical equilibria among the surface rocks, atmosphere and hypothesized percolating groundwater. A study was made of possible Martian surface mineralogy, as modified by the action of aqueous alteration, using the EQ3/6 computer codes. These codes calculate gas fugacities, aqueous speciation, ionic strength, pH, Eh and concentration and degree of mineral saturation for complex aqueous systems. Thus, these codes are also able to consider mineralogical solid solutions. These codes are able to predict the likely alteration phases which will occur as the result of weathering on the Martian surface. Knowledge of the stability conditions of these phases will then assist in the definition of the specifications for the sample canister of the proposed Martian sample return mission. The model and its results are discussed.
Document ID
19890009001
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Zolensky, M. E. (NASA Lyndon B. Johnson Space Center Houston, TX., United States)
Bourcier, W. L. (Lawrence Livermore National Lab. CA., United States)
Gooding, J. L. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Lunar and Planetary Inst., Workshop on Mars Sample Return Science
Subject Category
Lunar And Planetary Exploration
Accession Number
89N18372
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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