Unnamed (southwest of Monsoon Lake)

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.

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.