Unnamed (west of lower Ibeck Creek)

The Unnamed (west of lower Ibeck Creek) is a zinc 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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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 (west of lower Ibeck Creek)

Commodity

Primary: Zinc

Location

State: Alaska
District: Copper River

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

Alteration Type: L
Alteration Text: Oxidation of sulfides.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite

Comments

Comment (Geology): Age = Probably Tertiary based on the age of the host rocks.

Comment (Reference): Primary Reference = Jansons and others, 1984

Comment (Workings): Workings / Exploration = Site examined during U.S. Bureau of Mines mineral evaluation of the Chugach National Forest (Jansons and others, 1984). One grab sample contained 0.25% Zn (Jansons and others, 1984).

Comment (Exploration): Status = Inactive

Comment (Geology): Geologic Description = The occurrence is hosted in a unit of the Tertiary Orca Group consisting mostly of tabular or lenticular bodies of mafic volcanic rocks, including pillowed or massive flows, breccia and dikes (Nelson and others, 1985). Rocks in the area are iron-stained and contain disseminated pyrite. One grab sample contained 0.25% Zn (Jansons and others, 1984).

Comment (Deposit): Other Comments = Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.

Comment (Deposit): Model Name = Possibly Cyprus massive sulfide (Cox and Singer, 1986; model 24a)

References

Reference (Deposit): Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, Southcentral Alaska: U.S. Bureau of Mines Open-File Report 5-84, 218 p., 2 sheets, scale 1:250,000.

Reference (Deposit): Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, scale 1:250,000.

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