The Northwest Fork of Coghill River is a gold mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Northwest Fork of Coghill River MRDS details
Site Name
Primary: Northwest Fork of Coghill River
Commodity
Primary: Gold
Location
State: Alaska
District: Prince William Sound
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Placer Au-PGE
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Gold
Comments
Comment (Workings): Workings / Exploration = Three alluvium samples contained 0.0004 to 0.0063 oz Au/cubic yard. Gold up to 1/16 in diameter was recovered. Considerable arsenopyrite was also recovered (Jansons and others, 1984).
Comment (Reference): Primary Reference = Jansons and others, 1984
Comment (Geology): Geologic Description = According to Jansons and others (1984), gold is found in thin, poorly to moderately sorted alluvial gravels and concentrated on and in slate bedrock exposed in the canyon of the northwest fork of Coghill River. A small amount of gravel occurs in the canyon, but a substantial amount has accumulated above its junction with the main fork of the Coghill River. ? Three alluvium samples contained 0.0004 to 0.0063 oz Au/cubic yard. Gold nuggets up to 1/16 in diameter was recovered (Jansons and others, 1984).
Comment (Deposit): Model Name = Placer Au (Cox and Singer, 1986; model 39a)
Comment (Production): Production Notes = There is no recorded production, however Hoekzema and Fechner (1986) report the potential for mineral development to be moderate for suction dredging. The grades are low to marginal, but there is a good possibility of identifying local economic concentrations of gold.
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Quaternary
References
Reference (Deposit): Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, Southcentral Alaska: U.S. Bureau of Mines Open-File Report 5-84, 218 p., 2 sheets, scale 1:250,000.
Reference (Deposit): Hoekzema, R.B., and Fechner, S.A., 1986, Placer Gold sampling in and near the Chugach National Forest, Alaska: U.S. Bureau of Mines Information Circular 9091, 42 p.
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
