Mineralogic constraints on sulfur-rich soils from Pancam spectra at Gusev crater, Mars

Details Mineralogic constraints on sulfur-rich soils from Pancam spectra at Gusev crater, Mars Mineralogic constraints on sulfur-rich soils from Pancam spectra at Gusev crater, Mars

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3413202j&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 13, CiteID L13202

Physics

Geophysics

32

Mineral Physics: Optical, Infrared, And Raman Spectroscopy, Mathematical Geophysics: Spectral Analysis (3205, 3280), Planetary Sciences: Solid Surface Planets: Composition (1060, 3672), Planetary Sciences: Solid Surface Planets: Remote Sensing, Planetary Sciences: Solar System Objects: Mars

Scientific paper

The Mars Exploration Rover (MER) Spirit excavated sulfur-rich soils exhibiting high albedo and relatively white to yellow colors at three main locations on and south of Husband Hill in Gusev crater, Mars. The multispectral visible/near-infrared properties of these disturbed soils revealed by the Pancam stereo color camera vary appreciably over small spatial scales, but exhibit spectral features suggestive of ferric sulfates. Spectral mixture models constrain the mineralogy of these soils to include ferric sulfates in various states of hydration, such as ferricopiapite [Fe2/3 2+Fe4 3+(SO4)6(OH)2.20(H2O)], hydronium jarosite [(H3O)Fe3+ 3(SO4)2(OH)6], fibroferrite [Fe3+(SO4)(OH).5(H2O)], rhomboclase [HFe3+(SO4)2.4(H2O)], and paracoquimbite [Fe3+ 2(SO4)3.9(H2O)].

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