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Sampling for Gold in River Bars, Koskokwim River Basin, Alaska.

Authors
Maloney-RP
Source
MISSING :
Link
NIOSHTIC No.
10011519
Abstract
River bars were sampled over a 50-mile interval of the Kuskokwim River to determine the possibility of their containing significant amounts of gold. One-quarter cubic yard samples were concentrated by washing in a small, simple sluice box, and the concentrate further reduced by hand panning and then assayed. Colors of very fine gold were seen in the pan concentrates from all samples in the 50-mile interval, but assay results varied from nothing to about 2 cents per cubic yard of river bar material. It is questionable how much of the total amount of gold present in the samples was recovered in the concentrate; probably much less than 50 percent. The work indicated that the river bars contain free gold, and gold is presently being transported and deposited by the silt-laden waters. Additional investigation would be necessary to determine the extent and importance of this potential gold source; recovery in large-scale channel dredging operations, or as a byproduct in harbor excavations might be of economic significance.
Publication Date
19690101
Document Type
CP;
Fiscal Year
1969
NTIS Accession No.
NTIS Price
Identifying No.
OFR 16-69
NIOSH Division
AFOC;
Source Name
MISSING
State
AK;
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