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Thermal-infrared spectra and chemical analyses of twenty-six igneous rock samples

Remote Sensing of Environment

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Abstract

Emittance spectra in the 7.5 ??m to 14 ??m wavelength region and chemical compositions of 26 igneous rocks are reported. Experimental measurements on the rocks were made under simulated daytime field conditions. Some surface silicate contaminants, such as clayey silt, significantly altered the spectral emittance of a fresh sample, whereas, for these samples, hydrous and anhydrous ferric oxide weathering products did not mask important silicate spectral information. In the 11.75 ??m to 13.75 ??m wavelength region, the mean emittance of all the silicate samples was 0.956 ?? 0.008, except for periodtite, which had an average emittance of 0.895. This region of uniform emittance should be useful in remote sensing experiments for the separation of the effects of temperature and chemical composition on the spectral emittance of silicate rocks. ?? 1976.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Thermal-infrared spectra and chemical analyses of twenty-six igneous rock samples
Series title:
Remote Sensing of Environment
Volume
4
Issue:
C
Year Published:
1975
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Remote Sensing of Environment
First page:
199
Last page:
209
Number of Pages:
11