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High-resolution reflectance spectra of Mars in the 2.3-??m region: evidence for the mineral scapolite

Journal of Geophysical Research

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Abstract

Spatially resolved reflectance spectra of Mars in the 2.2- to 2.4-??m spectral region were obtained in August 1988 using the NASA 3-m Infrared Telescope Facility. The spectra show weak absorption features due to Martian atmospheric carbon monoxide and a surface mineral. Both CO and the mineral absorptions are composed of overlapping narrow features, but in many locations, such as Hellas, Chryse, Eden, and Moab, the mineral absorptions are quite strong, at least 3 times stronger than at the most absorbing wavelengths of CO near 2.33 ??m. Therefore CO complicates the analysis of the surface mineral but does not always overwhelm its signature. Model removal of the Martian atmospheric CO has been performed, and the remaining absorption bands are identified as scapolite. Higher spectral resolution Martian spectra in the 2.3-??m region as well as at 3.9 ??m are needed to confirm the scapolite identification and to constrain its abundance. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
High-resolution reflectance spectra of Mars in the 2.3-??m region: evidence for the mineral scapolite
Series title:
Journal of Geophysical Research
Volume
95
Issue:
B9
Year Published:
1990
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Geophysical Research