Makushin Valley NC

The Makushin Valley NC is a gold 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

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Site Name

Primary: Makushin Valley NC

Commodity

Primary: Gold
Primary: Silver

Location

State: Alaska
District: Aleutians

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: Epithermal vein, generic
Model Name: Porphyry Cu

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Diorite shows alteration to epidote and chlorite, probably propylitic alteration. Partial leaching reported reported but not of what was leached.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite
Gangue: Magnetite

Comments

Comment (Workings): Workings / Exploration = Six samples collected showed very low silver, gold, copper, and molybdenum, probably not much above background.

Comment (Reference): Primary Reference = Christie, 1974

Comment (Geology): Geologic Description = Small color anomaly in Unalaska Formation (see Drewes and others, 1961) at contact with porphyritic diorite. Diorite has miarolitic cavities and contains less than 0.5 percent pyrite and abundant magnetite. Christie (1974) reports this as a small system, yet in notes indicates it is a 1 mile (1.6 km) by 0.5 mile (800 m) northeast trending zone.

Comment (Deposit): Model Name = Copper porphyry(?) or epithermal vein(?)

Comment (Deposit): Model Number = 17, 25

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Cenozoic

References

Reference (Deposit): Drewes, Harold, Fraser, G.D., Snyder, G.L., and Barnett, H.F., Jr., 1961, Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-S, p. 583-676.

Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)

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