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Near-infrared reflectance of zunyite; implications for field mapping and remote-sensing detection of hydrothermally altered high alumina rocks

James K. Crowley
Near-infrared reflectance of zunyite; implications for field mapping and remote-sensing detection of hydrothermally altered high alumina rocks
Economic Geology and the Bulletin of the Society of Economic Geologists (May 1984) 79 (3): 553-557

Abstract

Several hydroxyl-bearing minerals have diagnostic absorption bands in the 2.0-2.4 mu m wave length range, and can be identified with an orbital radiometer and with high-resolution airborne and field portable spectrometers. Among such minerals, zunyite, 143Al (sub 13) Si (sub 5) O (sub 20) (OH,F) (sub 18) Cl, has distinctive spectral absorption characteristics and is notably restricted to, and thus an indicator mineral of, advanced argillic alteration. Although seldom noted because it visually resembles quartz, zunyite is probably not as rare as generally believed. Laboratory measurements and general considerations underlie suggestions favouring the feasibility of detecting zunyite, alone and in mixtures with other Al-OH minerals, using field portable spectrometers.


ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 79
Serial Issue: 3
Title: Near-infrared reflectance of zunyite; implications for field mapping and remote-sensing detection of hydrothermally altered high alumina rocks
Author(s): Crowley, James K.
Affiliation: U. S. Geol. Surv., Reston, VA, United States
Pages: 553-557
Published: 198405
Text Language: English
Publisher: Economic Geology Publishing Company, Lancaster, PA, United States
References: 27
Accession Number: 1984-038218
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N37°34'60" - N38°00'00", W108°00'00" - W107°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1984
Program Name: USGSOPNon-USGS publications with USGS authors
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