Abstract
Application of Imaging Spectroscopy for Mineral Exploration in Alaska: A Study over Porphyry Cu Deposits in the Eastern Alaska Range
Highlights
Imaging spectroscopy is a technology that has been utilized with success for mapping vegetation and mineral abundances over many areas of the Earth’s surface (e.g., Clark et al, 2003; Kokaly et al, 2009, 2013)
The U.S Geological Survey (USGS) conducted an airborne imaging spectroscopy study using the HyMap sensor to test this technology for mineral exploration at high latitudes in Alaska
The Nabesna pluton east of the middle fork of Bond Creek and north of the east fork of Bond Creek is dominated by white mica signatures
Summary
Imaging spectroscopy ( referred to as hyperspectral remote sensing) is a technology that has been utilized with success for mapping vegetation and mineral abundances over many areas of the Earth’s surface (e.g., Clark et al, 2003; Kokaly et al, 2009, 2013). Elias National Park, eastern Alaska Range (Fig. 1) This area was selected because (1) the region has reconnaissance-level geologic control based on historical USGS mapping (e.g., Richter, 1973; Richter et al, 1975a), (2) much of the uplands contain bedrock exposure for effective spectral mapping, and (3) the area includes several undisturbed porphyry Cu deposits and prospects. Porphyry deposits are typically characterized by broad alteration zones with distinctive mineralogy (e.g., Lowell and Guilbert, 1970; Seedorff et al, 2005; Sillitoe, 2010), including mineral(s) that can be remotely sensed using spectroscopy (e.g., Berger et al, 2003; John et al, 2010; Mars, 2013) These factors, along with reconnaissance ground sampling completed as part of this project, form a framework against which our imaging spectroscopy survey results can be compared and validated
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