Actions for Optical Constants of Mars Candidate Materials used to Model Laboratory Reflectance Spectra of Mixtures

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Optical Constants of Mars Candidate Materials used to Model Laboratory Reflectance Spectra of Mixtures

Author
Blake, D.
Published
March 17, 2004.
Physical Description
1 electronic document
Additional Creators
Roush, Ted L., Brown, Adrian Jon, and Bristow, T.
Online Version

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Summary
Data obtained at visible and nearinfrared wavelengths by OMEGA on MarsExpress and CRISM on MRO provide definitive evidence for the presence of phyllosilicates and other hydrated phases on Mars. A diverse range of both Fe/Mg-OH and Al- OH-bearing phyllosilicates were identified including the smectites nontronite, saponite, and montmorillonite. To constrain the abundances of these phyllosilicates, spectral analyses of mixtures are needed. We report on our effort to enable the quantitative evaluation of the abundance of hydrated-hydroxylated silicates when they are contained in mixtures. Here we focus on two component mixtures of the hydrated/ hydroxylated silicates, saponite and montmorillonite (Mg- and Al-rich smectites) with each other and with two analogs for other Martian materials; pyroxene (enstatite) and palagonitic soil (an alteration product of basaltic glass, hereafter referred to as palagonite). We prepared three size separates of each end-member for study: 20-45, 63-90, and 125-150 micron. Here we focus upon mixtures of the 63-90 m size fractions.
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Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20140006935.
ARC-E-DAA-TN12701.
Lunar and Planetary Science Conference; 17-21 Mar. 2014; The Woodlands, TX; United States.
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Copyright, Distribution as joint owner in the copyright.
View MARC record | catkey: 15436461