Multispectral Processing of ERTS-a (Landsat) Data for Uranium Exploration in the Wind River Basin,Wyoming: A Visible Region Ratio to Enhance Surface Alteration Associated with Roll-Type Uraium Deposits. Final Report,June 1974--July 1975.

摘要

The purpose of this report is to document possible detection capabilities of the LANDSAT multispectral scanner data for use in exploration for uranium roll-type deposits. Spectral reflectivity,mineralogy,iron content,and color paramenters were measured for twenty natural surface samples collected from a semiarid region. The relationships of these properties to LANDSAT response-weighted reflectances and to reflectance ratios are discussed. It was found that the single ratio technique of multispectral processing is likely to be sensitive enough to separate hematitic stain,but not limonitic. A combination of the LANDSAT R/sub 5,4/and R/sub 7,6/ratios,and a processing technique sensitive to vegetative cover is recommended for detecting areas of limonitic stain. Digital level slicing of LANDSAT R/sub 5,4/over the Wind River Basin,after geometric correction,resulted in adequate enhancement of Triassic redbeds and lighter red materials,but not for limonitic areas. No recommendations for prospects in the area were made. Information pertaining to techniques of evaluating laboratory reflectance spectra for remote sensing applications,ratio processing,and planimetric correction of LANDSAT data is presented qualitatively.