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Characterization of the Sheep Creek PB-Zn-Ag-Sn Prospect, North- central Alaska Range.

Authors
O'Connor-WK; Dahlin-DC; Warner-JD
Source
MISSING :15 pages
Link
NIOSHTIC No.
10007298
Abstract
The U.S. Bureau of Mines investigated the Sheep Creek prospect in the north-central Alaska range to evaluate the pb, zn, ag, and sn resources. The studies included field investigations, mineralogical characterization, and concentration tests. Mineralization at Sheep Creek consists of disseminated, banded, and massive pyrite, sphalerite, and galena. Tin occurs as grains of cassiterite (sNO2) in the quartz-mica matrix and within pyrite and sphalerite grains, and ag occurs in solid solution within the galena. Three bulk surface samples and two sets of core samples were collected at the Sheep Creek prospect for this study. Gravity concentration yielded products with up to 30 pct sn, and the best result was a product that recovered 52 pct of the sn at a grade of 22 pct sn. Bulk sulfide flotation yielded products that recovered up to 89 pct of the zn, 73 pct of the pb, and 75 pct of the ag, but grades were relatively low; selective flotation would significantly increase the grades.
Publication Date
19890101
Document Type
IH; Report of Investigations;
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Identifying No.
RI 9256
NIOSH Division
ALRC;
Source Name
MISSING
State
AK;
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