NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Quantitative estimation of granitoid composition from thermal infrared multispectral scanner (TIMS) data, Desolation Wilderness, northern Sierra Nevada, CaliforniaWe have produced images that quantitatively depict modal and chemical parameters of granitoids using an image processing algorithm called MINMAP that fits Gaussian curves to normalized emittance spectra recovered from thermal infrared multispectral scanner (TIMS) radiance data. We applied the algorithm to TIMS data from the Desolation Wilderness, an extensively glaciated area near the northern end of the Sierra Nevada batholith that is underlain by Jurassic and Cretaceous plutons that range from diorite and anorthosite to leucogranite. The wavelength corresponding to the calculated emittance minimum lambda(sub min) varies linearly with quartz content, SiO2, and other modal and chemical parameters. Thematic maps of quartz and silica content derived from lambda(sub min) values distinguish bodies of diorite from surrounding granite, identify outcrops of anorthosite, and separate felsic, intermediate, and mafic rocks.
Document ID
19950029970
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Sabine, Charles
(Desert Research Institute, Reno, NV United States)
Realmuto, Vincent J.
(Jet Propulsion Laboratory, Pasadena, CA United States)
Taranik, James V.
(Desert Research Institute, Reno, NV United States)
Date Acquired
August 16, 2013
Publication Date
March 10, 1994
Publication Information
Publication: Journal of Geophysical Research
Volume: 99
Issue: B3
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
95A61569
Funding Number(s)
CONTRACT_GRANT: NAGW-1679
CONTRACT_GRANT: NGT-50575
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available