The Unnamed (southwest of Monsoon Lake) is a copper and silver 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.
Unnamed (southwest of Monsoon Lake) MRDS details
Site Name
Primary: Unnamed (southwest of Monsoon Lake)
Commodity
Primary: Copper
Primary: Silver
Location
State: Alaska
District: Chistochina
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: Massive sulfide, Cyprus
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Role: Host
Age Type: Host Rock
Age Young: Permian
Age Old: Pennsylvanian
Analytical Data
Not available
Materials
Ore: Malachite
Ore: Chalcopyrite
Ore: Chalcocite
Ore: Bornite
Comments
Comment (Exploration): Status = Inactive
Comment (Deposit): Model Name = Cyprus massive sulfide (Cox and Singer, 1986, model 24a)
Comment (Deposit): Other Comments = It is likely that detailed prospecting will find numerous, additional small occurrence of copper sulfide minerals in metamorphosed andesite and basalt in the area. Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.
Comment (Geology): Age = Diagenetic or epigenetic remobilization of copper and associated metals in volcanic host rocks of Pennsylvanian to Permian age. Remobilization of copper may have occurred during green-schist metamorphism in the Jurassic.
Comment (Reference): Primary Reference = Castle and Degenhart, 1978
Comment (Workings): Workings / Exploration = The area was prospected on behalf of the Ahtna Native Regional Corporation in 1977 (Castle and Degenhart, 1978). An area immediately to the east was prospected by Noranda Inc. (Arehart, 1982). The exploration was only in reconnaissance.
Comment (Geology): Geologic Description = This occurrence is near the east end of the so-called 'KFC anomalous zone', an elongated east-west zone about 10 miles long which includes the KFC prospect (GU001). This occurrence consists of rubble crop and is coincident with highly anomalous stream sediment values for copper (101-570 ppm ) reported by Castle and Degenhart (1978, figure 6) near the east end of the KFC anomalous zone. Bedrock is mainly composed of schistose basalt and andesite of the Pennsylvanian to Permian, Tetelna Formation. Work to the east of the area (Arehart, 1982) found numerous occurrences of: 1) veinlets and disseminations of bornite, chalcocite, and chalcopyrite; 2) local copper staining in epidotized volcanics; and 3) the Platypus Mountain prospect (GU003), which occurs in a felsic horizon in the volcanics.
References
Reference (Deposit): Castle, B., and Degenhart, C., 1978, Lichen Greenstone Belt, v. 9, 1977 Annual Progress Report, Ahtna Project: Anchorage, Alaska, WGM, Inc., 22 p., maps and appendices. (Report held by Ahtna Minerals Co., Anchorage, Alaska).
Reference (Deposit): Arehart, G.B., 1982, Reconnaissance geology/geochemistry of the Alphabet Hills, Gulkana Quadrangle, Alaska: Noranda Exploration, 4 p., maps and appendices. (Report held by Ahtna Minerals Co., Anchorage, Alaska).
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.
