Physics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pggp.rept..399g&link_type=abstract
In NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984 p 399-401 (SEE N85-23474 13-91)
Physics
Lunar Composition, Lunar Mantle, Lunar Surface, Spectral Reflectance, Glass, Iron, Lunar Craters, Remote Sensing, Titanium
Scientific paper
Near-infrared spectral reflectance data were obtained for 12 localized lunar dark mantle deposits. The dominant feature in these data is the Fe(+2) absorption band in the 1.0 micron wavelength region. In order to emphasize differences in the characteristics of this absorption band, a straight-line continuum was removed from these spectra. On the basis of the depth and shape of this 1.0 micron absorption band, these spectra can be separated into three groups. Group 1 includes spectra from Grimaldi pyroclastics, Franklin floor, Atlas dhc 1, and Archimedes south rim. Absorption band centers in this group are located near 0.93 to 0.95 microns, and depths are approximately 4 to 5%. The shape of the 1.0 micron band in these spectra can be described as check-like, with a straight, steep short-wavelength edge and a straight longer-wavelength edge with a shallower slope. Group 2 is comprised of spectra from Aristoteles East 1 and 2, Rima Fresnel and Atlas dhc 2. These 1.0 micron bands are centered near 0.96 micron, and are deeper (7%) and more symmetrical than those in Group 1. Spectra in group 3 are represented by that of J. Herschel; which have a moderately deep (7%), broad absorption band in the 1.0 micron wavelength region.
Bell Jon F.
Gaddis Lisa R.
Hawke Bernard Ray
Lucey Paul
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