Physics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9714691c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. E9, p. 14,691-14,699.
Physics
23
Infrared Spectroscopy, Mars Surface, Mineral Exploration, Remote Sensing, Rocks, Spectral Reflectance, Basalt, Quartzite, Silicates
Scientific paper
The mid-IR (7-20 micron range) spectral properties of Pahala ash palagonite and the effect of thin dustings of the palagonite on reflectance characteristics of quartzite and basalt were investigated. Unlike the reflectance of quartzite and basalt, the reflectance of the palagonite is flat and low (1-2 percent). It was found that a dusting of 1-20 micron palagonite particles and 20-250 micron particle clumps, covering 50 percent of the quartzite of the basalt host reduced the quartizite mid-IR reflectance by about 50 percent. The reflectance of the underlying rock was found to be linearly related to the exposed surface area even for extremely small amounts of palagonite (2-100 micron thickness, averaging 5 microns), indicating that mid-IR remote sensing of rocks on Mars will be practical only for dust-free areas.
Bartholomew Mary Jane
Crisp Joy
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