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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Unnamed (west of lower Ibeck Creek) MRDS details
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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