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Investigation of a Copper Occurrence in the Rampart Diorites.

Authors
McDermott-MM; Foley-JY; Southworth-DD
Source
For Reference Only At Bureau Libraries :26 pages
Link
NIOSHTIC No.
10006720
Abstract
During the 1976-79 field seasons, the Bureau of Mines made mineral evaluation studies of the trans-Alaska pipeline corridor for the Bureau of Land Management. Part of the work was done by the University of Alaska, who in 1977 reported a body of hornblende diorite in the Rampart Group south of Hess Creek in the Livengood quadrangle that locally contained as much as 10 pct sulfide. In 1979 the Bureau of Mines used a combination of geological, geophysical, and geochemical methods to evaluate the potential of this area for porphyry-type copper deposits. Low concentrations of copper were found as minor occurrences in small diorite dikes and sills. The low concentrations found and the low tonnages implied by this mode of occurrence suggest that the rampart group assemblage has little potential for porphyry-copper-type deposits.
Publication Date
19810101
Document Type
CP;
Fiscal Year
1981
NTIS Accession No.
NTIS Price
Identifying No.
OFR 143-81
NIOSH Division
AFOC;
Source Name
For Reference Only At Bureau Libraries
State
AK;
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