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

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