The Head-Of-The-Bay (Cordova - Tacoma Copper Co.) is a 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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Head-Of-The-Bay (Cordova - Tacoma Copper Co.) MRDS details
Site Name
Primary: Head-Of-The-Bay (Cordova - Tacoma Copper Co.)
Commodity
Primary: Copper
Secondary: Zinc
Secondary: Silver
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: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Pyrrhotite
Comments
Comment (Exploration): Status = Inactive
Comment (Reserve-Resource): Reserves = Inferred reserves of 800 tons @ 0.6% Cu (Jansons and others, 1984).
Comment (Workings): Workings / Exploration = One adit observed in 1980 (Jansons and others, 1984) and reported by Grant and Higgins (1910). Two adits noted during industry exploration activity in 1986. The two adits are approximately 1/4 mile apart (B. Ellis, personal commun., 2000). Sampling and analyses during the 1980s by the U.S. Bureau of Mines (Jansons and others, 1984) resulted in the following values: Six chip samples contained 650 ppm to 4.05% Cu, 3.5 to 310 ppm Zn, and <0.1 to 1.8 ppm Ag. Two grab samples contained 4.6% and 5.2% Cu, 360 ppm and 0.15% Zn, and 8.8 ppm and 11 ppm Ag.
Comment (Reference): Primary Reference = Jansons and others, 1984
Comment (Deposit): Other Comments = Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.
Comment (Geology): Age = Probably Tertiary based on age of host rock (Nelson and others, 1985).
Comment (Geology): Geologic Description = This prospect consists of chalcopyrite and pyrrhotite in fracture zones and as disseminations in the wallrocks in interbedded graywacke, slate, and volcanic rocks of the Tertiary Orca Group (Nelson and others, 1985). Four shear zones 1 to 5 feet wide cut the volcanic rocks.
References
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): Grant, U.S., and Higgins, D.F., Jr., 1910, Reconnaissance of the geology and mineral resources of Prince William Sound, Alaska: U.S. Geological Survey Bulletin 443, 89 p.
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, scale 1:250,000.
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