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Differentiating volcanic rock assemblages using Landsat Thematic Mapper data - Influence of petrochemistry and desert varnishAn investigation has been conducted of the composition, distribution, spectral properties, and Landsat TM influences of desert varnish from three sites in southern Nevada. It is established that the TM signatures of diverse volcanic rock assemblages primarily depend on primary petrochemical characteristics. Desert varnish is found to exert a minimal influence on TM imagery at longer wavelengths, but absorbs the higher frequency radiation of TM bands 1-3, thereby leading to high TM band 5/2 values and dark contrast on 5/2 images over units with high rock-varnish albedo difference; highly evolved volcanic deposits show steep positive spectral slopes in the TM band 5-7 region.
Document ID
19890056892
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Spatz, D. M.
(Nevada Univ. Reno, NV, United States)
Taranik, J. V.
(Nevada Univ. Reno, NV, United States)
Hsu, L. C.
(Nevada, University Reno, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Advances in Space Research
Volume: 9
Issue: 1, 19
ISSN: 0273-1177
Subject Category
Earth Resources And Remote Sensing
Accession Number
89A44263
Distribution Limits
Public
Copyright
Other

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