Reinken, Bornite Lake

The Reinken, Bornite Lake is a gold, silver, and copper 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: Reinken, Bornite Lake

Commodity

Primary: Gold
Primary: Silver
Primary: Copper
Secondary: Mercury

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: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Epithermal vein, generic
Model Name: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Pervasive silicification of country rocks.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite
Gangue: Quartz

Comments

Comment (Workings): Workings / Exploration = Reported 18th or 19th century mining by Russians. No evidence remains of Russian activity; prospect possibly staked by John and Leon Reinken in 1929. Kennecott-Alaska (Simpson, 1986) collected 23 rock samples; Battle Mountain Exploration Co. (Randolph, 1991) collected pan concentrates and an additional 9 rock samples. None of BMEC rock samples were anomalous in gold; one contained 4.8 ppm silver, 9,085 ppm copper, and 410 ppb mercury. Pan concentrates contained up to 240 ppb gold and 920 ppm copper.

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Randolph, 1991

Comment (Deposit): Model Number = 22c, 25

Comment (Geology): Geologic Description = Quartz veins up to 60 cm wide cut a silicified roche moutonnee immediately north of lake. Roche moutonnee is pervasively silicified and 500 feet wide by 1,500 feet long (150 x 450 m). Up to 30 percent pyrite occurs in veins and silicified rock. Country rock shown in Drewes and others (1961) as Unalaska Formation, about 2 km from mapped southern margin of Shaler batholith (granodiorite).

Comment (Deposit): Other Comments = Reportedly mined during Russian period, Battle Mountain Exploration Co. (Simpson, 1986; erroneously reported as the 1600's), Randolph, 1991) gave the prospect a poor potential for economic gold mineralization due to remoteness, ruggedness of the environment, and minimal evidence for economic mineralization.

Comment (Deposit): Model Name = Polymetallic vein, epithermal gold vein

Comment (Geology): Age = Miocene or younger

References

Reference (Deposit): Simpson, D.F., 1986, Aleutian Islands project, 1985 final report: Kennecott Alaska Exploration Company, 54 p. (Report held by the Aleut Native Corporation, Anchorage, Alaska.)

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): Randolph, D.B., 1991, Unalaska project, 1990 final report: Battle Mountain Exploration Company, Alaska District, 62 p., 5 appendices, 15 plates, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

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