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

Roberto Chiari; Ilaria Longhi; Maria A. Sgavetti; Anna Gelli; Andrea Orsi; Fabrizio Pecoraro

doi:10.1117/12.298154

30 December 1997 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

Roberto Chiari, Ilaria Longhi, Maria A. Sgavetti, Anna Gelli, Andrea Orsi, Fabrizio Pecoraro

Author Affiliations +

Proceedings Volume 3222, Earth Surface Remote Sensing; (1997) https://doi.org/10.1117/12.298154
Event: Aerospace Remote Sensing '97, 1997, London, United Kingdom

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.

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Roberto Chiari, Ilaria Longhi, Maria A. Sgavetti, Anna Gelli, Andrea Orsi, and Fabrizio Pecoraro "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", Proc. SPIE 3222, Earth Surface Remote Sensing, (30 December 1997); https://doi.org/10.1117/12.298154

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