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Proceedings Paper

Spectral classification of rocks: analysis of laboratory 0.4- to 2.5-um reflectance and 2.5- to 25-um transmittance spectra of sedimentary and metamorphic rocks
Author(s): Roberto Chiari; Ilaria Longhi; Maria A. Sgavetti; Anna Gelli; Andrea Orsi; Fabrizio Pecoraro
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Paper Abstract

Reflectance (0.4 - 2.5 micrometer) and transmittance (2.5 - 25 micrometer) laboratory spectra of sedimentary and metamorphic rocks from different geologic settings were analyzed and classified, and used for the simulation of hyperspectral (MIVIS) response. The analysis regarded both freshly cut and exposed rock surfaces. Classification was based on absorption features forming significant associations that fully characterized groups of rocks. In carbonate rocks, the dominant spectral features in the VIS-NIR resulted from the fundamental mineralogy, whereas within overall silicatic rocks the discrimination was based on secondary mineralogic phases, that resulted spectrally dominant. In transmission spectra of silicatic rocks, spectrally dominant features, due to different bounding of Si4+ ion, allowed further differentiation between rocks not discriminated in the reflectance spectra. Classification of spectra of exposed surfaces did not significantly diverge from that of the freshly cut surfaces, apart from heavy lichen coating.

Paper Details

Date Published: 30 December 1997
PDF: 11 pages
Proc. SPIE 3222, Earth Surface Remote Sensing, (30 December 1997); doi: 10.1117/12.298154
Show Author Affiliations
Roberto Chiari, Univ. of Parma (Italy)
Ilaria Longhi, Univ. of Parma (Italy)
Maria A. Sgavetti, Univ. of Parma (Italy)
Anna Gelli, Univ. of Parma (Italy)
Andrea Orsi, Univ. of Parma (Italy)
Fabrizio Pecoraro, Univ. of Parma (Italy)

Published in SPIE Proceedings Vol. 3222:
Earth Surface Remote Sensing
Giovanna Cecchi; Edwin T. Engman; Eugenio Zilioli, Editor(s)

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