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Proceedings Paper

Spectral classification of the rocks as a preliminary procedure for the lithologic interpretation of remote sensing multispectral data
Author(s): Roberto Chiari; M. Carla Ferrari; Maria A. Sgavetti
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Paper Abstract

More than seventy reflectance spectra measured on mainly carbonate and evaporitic rocks outcropping in an area of northern Somalia have been analysed and classified through the recognition of specifically defined spectrofacies. The spectrofacies are associations of absorption features produced by specific electronic and molecular processes or a combination of them. The spectrofacies provide synthetic and exhaustive descriptions of the physical-chemical properties of the rocks. In the study area, the stratigraphic distribution of the spectrofacies resulted to be significantly consistent with the lithostratigraphic units known in the literature. The spectral curves of the weathered surfaces of the same samples have shown, in some cases, a specific relationship with the spectra of the fresh rocks, thus adding complementary information on the nature of the rocks (e.g.., specific rock texture appar- ently associated with lichen cover). The spectra of the weathered surfaces have also been used for the simulation of the Thematic Mapper responses by convolution with the sensitivity curves. The comparison between simulated and original TM values provided the key for the lithologic interpretation of TM multiband images.

Paper Details

Date Published: 30 December 1994
PDF: 12 pages
Proc. SPIE 2320, Geology from Space, (30 December 1994); doi: 10.1117/12.197298
Show Author Affiliations
Roberto Chiari, Univ. of Parma (Italy)
M. Carla Ferrari, Univ. of Parma (Italy)
Maria A. Sgavetti, Univ. of Parma (Italy)

Published in SPIE Proceedings Vol. 2320:
Geology from Space
Eugenio Zilioli, Editor(s)

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