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GEOREF RECORD

Epithermal beryllium deposits in water-laid tuff, western Utah

D. A. Lindsey
Epithermal beryllium deposits in water-laid tuff, western Utah
Economic Geology and the Bulletin of the Society of Economic Geologists (April 1977) 72 (2): 219-232

Abstract

Epithermal beryllium deposits in western Utah have distinctive geological and geochemical associations that provide guides to exploration for new resources of beryllium and associated metals. Beryllium deposits at Spor Mountain and the Honeycomb Hills are uniquely associated with topaz-bearing rhyolite of Late Tertiary age and are restricted to porous water-laid tuff and breccia that contains carbonate clasts. The beryllium deposits are near both local and regional faults that probably provided conduits for mineralizing fluids.The beryllium deposits contain sizable but uneconomic concentrations of fluorite, lithium (in smectite), manganese oxides, zinc (in smectite and manganese oxides), and uranium, as well as many trace elements. Distinctive zones of argillic and feldspathic alteration enclose the beryllium deposits and generally are parallel to the original stratification of the host tuff. Anomalous concentrations of fluorine, beryllium, cesium, lithium, gallium, niobium, and yttrium occur in relatively unmineralized tuff nearby; these elements form extensive but discontinuous halos around the Spor Mountain beryllium and fluorspar district.The mineralized areas at Spor Mountain and the Honeycomb Hills may be the tops of extensive altered zones that contain deep ore deposits. Anomalous molybdenum, lead, tin, and tungsten in beryllium deposits at Spor Mountain may indicate such leakage. Consideration of possible zonation of ore deposits suggests that if ore deposits do exist at depth, they are in greisens, banded tactites, and medium to high temperature veins similar to the tin-beryllium deposits in the York Mountains of Alaska.


ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 72
Serial Issue: 2
Title: Epithermal beryllium deposits in water-laid tuff, western Utah
Author(s): Lindsey, D. A.
Affiliation: U. S. Geol. Surv., Reston, Va., United States
Pages: 219-232
Published: 197704
Text Language: English
Publisher: Economic Geology Publishing Company, Lancaster, PA, United States
References: 30
Accession Number: 1977-031632
Categories: Economic geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. table, geol. sketch map
N39°40'00" - N39°49'60", W113°15'00" - W113°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Society of Economic Geologists
Update Code: 1977
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