DISCRIMINATING DOLOMITIZATION OF MARBLE IN THE LUDWIG SKARN NEAR YERINGTON, NEVADA USING HIGH-RESOLUTION AIRBORNE INFRARED IMAGERY

Geoscan Mk II airborne visible and infrared imagery at 6-m resolution was compared to geologic mapping to investigate its utility in the delineation of hydrothermal dolomitization of a limestone unit in the Singatse Range near Yerington, Nevada. The imagery was processed by contrast stretching of difference images and corrected to "apparent reflectance" using laboratory spectra to obtain offset corrections. Alteration maps at scales of 1:2400 by Harris (1979) and 1:600 by the first author were considered. At both scales, good to very good correlations were achieved between the processed imagery and geologic mapping. The ready discrimination between two carbonate lithologies is a result of marked differences in the reflectance spectra of the host marble and the hydrothermal dolomite. Petrographic textures, particle sizes, and the presence of impurities are considered as possible sources of this spectral variation.

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    American Society for Photogrammetry and Remote Sensing

    5410 Grosvenor Lane, Suite 210
    Bethesda, MD  United States  20814-2160
  • Authors:
    • Windeler, D S
    • Lyon, RJP
  • Publication Date: 1991-9

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  • Accession Number: 00616730
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 30 2003 12:00AM