106 37th Annual Undergraduate Research Exhibition Sponsored by Sigma Gamma Epsilon (Posters)

All students are encouraged to submit research to this poster session. Investigations from ANY geological subdiscipline are welcome. Presenters who are SGE members are eligible to compete for monetary awards distributed at the meeting.

Monday, 20 October 2025
8:00 AM - 5:30 PM
HBGCC, Hall 1

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

Paper number: 106-5
Program: Technical Sessions
Time: 8:00 AM – 8:00 AM

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 Programs. Vol. 57, No. 6

doi: 10.1130/abs/2025AM-413044

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