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Clays on Mars: Review of chemical and mineralogical evidence (1991)

Gooding, James L. ; Banin, Amos

In: Other Sources

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Publication Date: 2019-01-25

Description: Mafic igneous bedrock is inferred for Mars, based on spectrophotometric evidence for pyroxene (principally in optically dark areas of the globe) and the pyroxenite-peridotite petrology of shergottite nakhlite chassignite (SNC) meteorites. Visible and infrared spectra of reddish-brown surface fines (which dominate Martian bright areas) indicate ferric iron and compare favorably (though not uniquely) with spectra of palagonitic soils. Laboratory studies of SNC's and Viking Lander results support a model for Martian soil based on chemical weathering of mafic rocks to produce layer structured silicates (clay minerals), salts, and iron oxides.

Keywords: LUNAR AND PLANETARY EXPLORATION

Type: NASA. Johnson Space Center, Program and Abstracts for Clay Minerals Society 28th Annual Meeting; p 10

Format: text

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