Reger Pyrrhotite

The Reger Pyrrhotite is a copper and nickel 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: Reger Pyrrhotite

Commodity

Primary: Copper
Primary: Nickel
Secondary: Iron

Location

State: Alaska
District: McGrath

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: Noril'sk Cu-Ni-PGE

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Copper bearing sulfides oxidized to azurite and malachite.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrrhotite
Gangue: Limonite

Comments

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Herreid, 1968

Comment (Workings): Workings / Exploration = The Reger Pyrrhotite occurrence was found by R.D. Reger during field investigations by the Alaska Department of Natural Resources in 1967 (Herreid, 1968). A sample collected in the mineralized aureole contains 230 ppm copper and 600 ppm nickel.

Comment (Geology): Age = Unknown; dike rock is undated.

Comment (Deposit): Other Comments = See Chip Loy deposit (MG032).

Comment (Geology): Geologic Description = The Reger Pyrrhotite occurrence is in a limestone-slate thermal aureole 760 meters north of the contact of the Middle Fork Plutonic complex (Solie, 1983). A steeply dipping mafic dike of Tertiary (?) age is covered by limonite and contains abundant disseminated pyrrhotite. The sulfide-bearing dike continues upward to an elevation of at least 3,750 feet (1,143 m). Azurite and malachite staining was noted. A sample collected in the mineralized area contains 230 ppm copper and 600 ppm nickel (Herreid, 1968).

Comment (Deposit): Model Name = Unknown--possibly disseminated Ni-Cu-PGE type (Cox and Singer, 1986; model 5b).

References

Reference (Deposit): Solie, D.N., 1983, The Middle Fork plutonic complex, McGrath A-3 quadrangle, southwest Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 83-16, 22 pages.

Reference (Deposit): Herreid, G.H., 1968, Geological and geochemical investigations southwest of Farewell, Alaska: Alaska Division of Mines and Geology Geologic Report 26, 24 p., 1 sheet, scale 1:75,000.

Reference (Deposit): Gilbert, W.G., Solie, D.N., and Kline, J.T., 1988, Geologic map of the McGrath A-3 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 92, 2 sheets, 1:63,360 scale.

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.