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Imaging spectrometer reflectance data for Nabesna, Alaska Approximately 1,900 line square kilometers of imagery were collected using a HyMap™ sensor (Cocks and others, 1998) mounted on a modified Piper Navajo aircraft. The aircraft was flown at an altitude of approximately 5,050 m (3,480 m above the mean ground surface elevation of 1570 m) resulting in average ground spatial resolution of 6.7 m. Solar elevation and azimuth angles ranged from 42.0-48.3° (average 46.2°) and 134.2-182.4° (average 155°), respectively. HyMap measured reflected sunlight in 126 narrow channels that cover the wavelength region of 455 to 2,483 nm. Data were delivered by the operators of the sensor (HyVista Corp., Australia) in units of radiance (data are available in Kokaly and others, 2017).... Categories: Data; Tags: Alaska, Alaska, Alaska Range, Bond Creek, Canada, All tags... ENVI, Environment for Visualizing Images, HyMap, MRP, Mineral Resources Program, Nabesna, Nabesna A-2 quadrangle, Nabesna A-4 quadrangle, Nabesna B-4 quadrangle, Nikonda Creek, Nutzotin Mountains, Orange Hill, SWIR, VNIR, Valdez-Cordova, Wrangell Mountains, Wrangell–Saint Elias National Preserve, Yukon Territory, economy, geoscientificInformation, hyperspectral imaging, imageryBaseMapsEarthCover, imaging spectroscopy, infrared imaging, mineral resources, mineralogy, remote sensing, shortwave infrared, spectroscopy, visible-near infrared, Fewer tags Mineral predominance map for Nabesna, Alaska, derived from imaging spectrometer reflectance data Reflectance data from HyMap™ were processed using the Material Identification and Characterization Algorithm (MICA), a module of the USGS PRISM (Processing Routines in IDL for Spectroscopic Measurements) software (Kokaly, 2011), programmed in Interactive Data Language (IDL; Harris Geospatial Solutions, Broomfield, Colorado). The HyMap reflectance data are provided and described in this data release. MICA identifies the spectrally predominant mineral(s) in each pixel of imaging spectrometer data by comparing continuum-removed spectral features in the pixel’s reflectance spectrum to continuum-removed absorption features in reference spectra of minerals, vegetation, water, and other materials. Linear continuum removal... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Alaska, Alaska, Alaska Range, Bond Creek, Canada, All tags... ENVI, Environment for Visualizing Images, HyMap, MRP, Mineral Resources Program, Nabesna, Nabesna A-2 quadrangle, Nabesna A-4 quadrangle, Nabesna B-4 quadrangle, Nikonda Creek, Nutzotin Mountains, Orange Hill, SWIR, VNIR, Valdez-Cordova, Wrangell Mountains, Wrangell–Saint Elias National Preserve, Yukon Territory, economy, geoscientificInformation, hyperspectral imaging, imageryBaseMapsEarthCover, imaging spectroscopy, infrared imaging, mineral resources, mineralogy, remote sensing, shortwave infrared, spectroscopy, visible-near infrared, Fewer tags Whole rock, soil, sediment, x-ray diffraction, and electron microprobe analyses of samples from the Orange Hill-Bond Creek area, Nabesna Quadrangle, Alaska This data release includes geochemical, x-ray diffraction mineralogical, and electron probe microanalysis (EPMA) data on rocks, soils, and sediments collected near the Orange Hill and Bond Creek porphyry copper deposits, Nabesna quadrangle, Alaska. Geochemical analyses were completed by a laboratory under contract with the U.S. Geological Survey (USGS). Electron microprobe and x-ray diffraction mineralogical analyses were completed by personnel of the Central Region Minerals Program in Denver, Colorado. The samples were collected and analyzed during 2014 to 2016, selected to help characterize the distribution and composition of mineralized and unmineralized geologic materials in this remote part of the eastern Alaska... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Alaska Range, Alder Gulch, Bond Creek, Chathenda Creek, All tags... EPMA, Geochemistry, Gold Hill, Mineralogy, Nabesna, Nabesna A-2 quadrangle, Nabesna A-4 quadrangle, Nabesna B-4 quadrangle, Nikonda Creek, Nutzotin Mountains, Orange Hill, Red Hill Creek, USGS Science Data Catalog (SDC), Valdez-Cordova County, Wrangell Mountains, Wrangell–Saint Elias National Preserve, XRD, airborne imaging spectroscopy, chemical analysis, copper, economy, electron probe micronanalysis, geochemistry, geoscientificInformation, hyperspectral, hyperspectral imaging, mineral resources, mineralogy, porphyry copper, rock, rock geochemistry, soil, soil chemistry, soil geochemistry, stream sediment, unconsolidated deposits, x-ray diffraction, Fewer tags White mica wavelength position map for Nabesna, Alaska, derived from imaging spectrometer reflectance data A map of the wavelength position of the white mica 2,200 nanometer (nm) Al-OH absorption feature was compiled for a region of Nabesna, Alaska, using HyMap™ reflectance data provided and described in this data release. White mica wavelength position was computed for each pixel with spectrally predominant muscovite or illite. The computation was made using a function of the USGS PRISM (Processing Routines in IDL for Spectroscopic Measurements) software (Kokaly, 2011), programmed in Interactive Data Language (IDL; Harris Geospatial Solutions, Broomfield, Colorado). The PRISM function applies linear continuum-removal (Clark and Roush, 1984) to the 2,200 nm feature and fits a parabola to three channels: the channel... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Alaska, Alaska, Alaska Range, Bond Creek, Canada, All tags... ENVI, Environment for Visualizing Images, HyMap, MRP, Mineral Resources Program, Nabesna, Nabesna A-2 quadrangle, Nabesna A-4 quadrangle, Nabesna B-4 quadrangle, Nikonda Creek, Nutzotin Mountains, Orange Hill, SWIR, VNIR, Valdez-Cordova, Wrangell Mountains, Wrangell–Saint Elias National Preserve, Yukon Territory, economy, geoscientificInformation, hyperspectral imaging, imageryBaseMapsEarthCover, imaging spectroscopy, infrared imaging, mineral resources, mineralogy, remote sensing, shortwave infrared, spectroscopy, visible-near infrared, Fewer tags