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Billings Glacier Molybdenum-copper Occurrence, Whittier, Alaska.

Authors
Hoekzema-RB; Sherman-GE
Source
For Reference Only At Bureau Libraries :30 pages
Link
NIOSHTIC No.
10006718
Abstract
A previously unreported occurrence of molybdenum and copper mineralization in a small granitic stock exposed at the toe of Billings Glacier, 5.5 miles northeast of Whittier, Alaska, was discovered and examined by the Bureau of Mines in July and August 1981. Molybdenite occurs as disseminated grains and crystalline clusters, up to 1 1/2 inches across, apparently associated with hydrothermally altered portions and also along fractures in the granitic pluton. Molybdenite also occurs as disseminated grains in spheroidally weathering granitic xenoliths found in the pluton near its eastern contact. Minor pyrite and minor amounts of chalcopyrite are disseminated throughout marginal portions of the pluton. A high- grade sample of the mineralized granite contained 2,000 ppm mo but other samples did not exceed 30 ppm. Copper did not exceed 90 ppm and generally was less than 50 ppm in samples of the stock analyzed.
Publication Date
19810101
Document Type
CP;
Fiscal Year
1981
Identifying No.
OFR 141-81
NIOSH Division
AFOC;
Source Name
For Reference Only At Bureau Libraries
State
AK;
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division