Remote sensing studies of immature soils on the Moon (Reiner-gamma formation)

Details Remote sensing studies of immature soils on the Moon (Reiner-gamma formation) Remote sensing studies of immature soils on the Moon (Reiner-gamma formation)

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993avest..27...16s&link_type=abstract

Astronomicheskii Vestnik (ISSN 0320-930X), vol. 27, no. 4, p. 16-30

Mathematics

Logic

3

Chronology, Exposure, Lunar Soil, Remote Sensing, Grain Size, Mapping, Polarimeters, Ratios, Spectrum Analysis

Scientific paper

On the base of laboratory results and telescopic data it is shown that the spectropolarization ratio PmaxB/PmaxR for blue and red spectral regions is a remote sensing parameter of lunar soil maturity. It correlates with value of maturity index derived from morphological or ferromagnetic methods of exposure age determination. This parameter is equal to 0.315 for Reiner-gamma formation. So Reiner-gamma area is covered by immature soil. An extensive spectral mapping of the Reiner-gamma formation with high spatial resolution (0.2 km/pixel) was produced. This result was obtained at the 2-meter aperture telescope of Pic-du-Midi (France). The data sets consist in repeated runs comprising 10 selected narrow-band images (from 0.4 to 1.05 micron). The analysis of these data suggests that such a type of immature material includes not more than 28% of agglutinattes. We find the model grain size of fine fraction to be 40 micrometers grain size, of more immature soil 400-500 micrometers, and of the formation soil 120-150 micrometers. The exposure age of the Reiner-gamma immature soil is equal about 10 x 106 years.

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