A spectral analysis of ordinary chondrites, S-type asteroids, and their component minerals - Genetic implications

Details A spectral analysis of ordinary chondrites, S-type asteroids, and their component minerals - Genetic implications A spectral analysis of ordinary chondrites, S-type asteroids, and their component minerals - Genetic implications

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9720863f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. E12, p. 20,863-20,874.

Physics

20

Asteroids, Chondrites, Meteoritic Composition, Mineralogy, Spectral Reflectance, Solar System, Spectrum Analysis

Scientific paper

Genetic relationships between ordinary chondrites (OCs) and S-type asteroids were investigated by comparing earth-based spectroscopic reflectance data on several asteroid classes with similar data on meteorite classes. The approach used is similar to that of Chapman and Gaffey (1979), in which albedo at 0.56 microns, the continuum slope, and the depth of the electronic absorption band due to octahedrally coordinated Fe(2+) in olivine and pyroxene were numerically extracted from the spectra of samples, and were plotted in a 3D coordinate system. The results show that the S-type asteroids are genetically different from OCs and are not the parent body sources of the latter. The S-type asteroids represent components derived from various zones of differentiated protoasteroids and supply achondritic, stony-iron, and some portion of the iron meteorites to earth. It is suggested that the M-asteroids are S-asteroids which are especially poor in silicate components.

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