106-6 Using Spectral Feature Fitting of Visible and Near-Infrared EMIT Data to Add Alluvial Deposits and Mined Lands to a 1:62,500 Scale Geologic Map of the Western Humboldt Range, Nevada

Session: 37th Annual Undergraduate Research Exhibition Sponsored by Sigma Gamma Epsilon (Posters)

Presenting Author:

Authors:

Abstract:

The investigators applied spectral feature fitting (SFF) to 60 m cell size visible and near-infrared EMIT data from the western Humboldt Range, Nevada. This resulted in five RGB composites: Calcite-Pyrophyllite-Quartz, Calcite-Dumortierite-Quartz, Siderite-Dumortierite-Quartz, Calcite-Goethite-Quartz, and Kaolinite-Quartz-Goethite. Comparison with an existing 1:62,500 scale geologic map shows that the Triassic Prida Formation (limestone with mafic volcanic flows and intrusions) and the Permian Rochester Rhyolite are readily apparent on all of the images. Also, the EMIT data shows that alluvial deposits mantle part of the Prida Formation in an area where the geologic map depicts only bedrock. In addition, mined lands associated with the Lincoln Mine are readily apparent on the Kaolinite-Quartz-Goethite RGB composite, and, to a lesser extent, on the other composites. The extent of the Lincoln Mine is apparent from the EMIT data, but the extent is not depicted on the geologic map. Study results show how SFF of EMIT data adds to what is depicted on an existing geologic map.

Geological Society of America Abstracts with Program. Vol. 57, No. 6, 2025

doi: 10.1130/abs/2025AM-8124

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