Unnamed (south of upper Long Creek)

The Unnamed (south of upper Long Creek) is a gold 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: Unnamed (south of upper Long Creek)

Commodity

Primary: Gold
Primary: Copper
Secondary: Chromium
Secondary: Platinum
Secondary: Nickel

Location

State: Alaska
District: Valdez Creek

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: Podiform chromite (minor)

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Role: Host
Age Type: Host Rock
Age Young: Devonian

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Chromite
Ore: Pyrite

Comments

Comment (Geology): Age = Host rock is Devonian.

Comment (Geology): Age = The copper and chromium minerals probably were syngenetic with their Devonian ultramafic hostrock, and may have been partly redistributed during serpentinization.

Comment (Workings): Workings / Exploration = Surface sampling only. Local high platinum, chrome, and nickel values have also been reported. Samples contain up to 0.3 ppm gold, 1,500 ppm chromium, 3,000 ppm copper, 1,500 ppm nickel, and a trace of platinum (Hawley and others, 1969).

Comment (Geology): Geologic Description = The country rocks in the area of this prospect consist largely of sheared, Devonian serpentinite that forms lenticular and podiform tectonic blocks as much as several hundred meters in size. The deposit is in serpentinite, and consists of pyrite-rich pods, locally accompanied by chalcopyrite and gold-rich zones. Local high platinum, chrome, and nickel values have also been reported. Samples contain up to 0.3 ppm gold, 1,500 ppm chromium, 3,000 ppm copper, 1,500 ppm nickel, and a trace of platinum (Hawley and others, 1969).

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Podiform chromite (Cox and Singer, 1986; model 8a)

Comment (Reserve-Resource): Reserves = None of the sulfide bodies appears to be of any significant size.

Comment (Reference): Primary Reference = Hawley and others, 1969

References

Reference (Deposit): Hawley, C.C., and Clark, A.L., 1974, Geology and mineral deposits of the upper Chulitna district, Alaska: U.S. Geological Survey Professional Paper 758-B, p. 1-47, 2 sheets, scale 1:12,000 and 1:48,000.

Reference (Deposit): Hawley, C.C., Clark, A.L., Herdrick, M.A., and Clark, S.H.B., 1969, Results of geological and geochemical investigations in an area northwest of the Chulitna River, central Alaska Range: U.S. Geological Survey Circular 617, 19 p.

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