Lithological and textural controls on radar and diurnal thermal signatures of weathered volcanic deposits, Lunar Crater region, Nevada

摘要: Radar backscatter intensity as measured by calibrated synthetic aperture radar (SAR) systems is primarily controlled three factors: local incidence angle, wavelength-scale roughness, and dielectric permittivity of surface materials. observations may be limited use for geological investigations composition, unless the relationships between lithology above characteristics can adequately understood. In arid terrains, such Southwest U.S., weathering signatures (e.g. soil development, fracturing, debris grain size shape, hill slope characteristics) are to some extent lithologic parent bedrock. These textural features outcrops their associated will affect varying degrees, multiple-wavelength capability JPL Airborne SAR (AIRSAR) system allows sampling textures at distinct scales. Diurnal temperature excursions geologic surfaces thermal inertia materials, which a measure resistance material change in temperature. Other influences include albedo, slopes affecting insolation, meteorological conditions emissivity relevant wavelengths. To first order, variations on terrain result from distribution porosity differences, scales ranging micrometers tens meters. emission observations, those made Thermal Infrared Multispectral Scanner (TIMS) airborne instrument, thus influenced geometric comparable controlling backscatter. A preliminary report project involving combination field, laboratory remote sensing weathered felsic-to basaltic volcanic rock units exposed southern part Lunar Crater Volcanic Field, Pancake Range central Nevada presented. Focus relationship cross sections multiple wavelengths, apparent diurnal identified multi-temporal TIMS images, geometries related style, bedrock lithology.