Mapping porphyry-skarn alteration at Yerington, Nevada, using airborne hyperspectral VNIR-SWIR-TIR imaging data

T.J. Cudahy, J. Wilson, R. Hewson, P. Linton, P. Harris, M. Sears, K. Okada, J.A. Hackwell

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

14 Citations (Scopus)

Abstract

The alteration mineralogy of a porphyry-skarn system near Yerington, Nevada, was mapped using combined airborne hyperspectral HyMap and SEBASS data. The VNIR-SWIR HyMap data provided information about the abundance and levels of Tschermak substitution in white micas, as well as mapping the Mg-Fe chemistry of chlorite. The TIR SEBASS data provided unique information about the abundance and Fe-Al chemistry of garnet and Na-Ca chemistry of plagioclase feldspar. Both wavelength regions mapped calcite, dolomite, amphibole and epidote. The derived mineral maps were validated through spectral, mineralogical and chemical analyses of associated field samples. From these mineral maps, the geometry and physicochemistry of porphyry-skarn hydrothermal system becomes apparent, including the sites for Cu mineralization.

Original languageEnglish
Title of host publication2001 International Geoscience and Remote Sensing Symposium (IGARSS)
Place of PublicationPiscataway, NJ
PublisherIEEE
Pages631-633
Number of pages3
ISBN (Print)0-7803-7031-7
DOIs
Publication statusPublished - 2001
Externally publishedYes
EventIEEE International Geoscience and Remote Sensing Symposium, IGARSS 2001: Scanning the Present and Resolving the Future - Sydney, Australia
Duration: 9 Jul 200113 Jul 2001

Publication series

NameIEEE International Geoscience and Remote Sensing Symposium (IGARSS)
PublisherIEEE
Volume2001
ISSN (Print)2153-6996
ISSN (Electronic)2153-7003

Conference

ConferenceIEEE International Geoscience and Remote Sensing Symposium, IGARSS 2001
Abbreviated titleIGARSS 2001
CountryAustralia
CitySydney
Period9/07/0113/07/01

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