The Iron Cap is a silver, gold, copper, and 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
Elevation:
Commodity: Silver, Gold, Copper, Zinc
Lat, Long: 56.06806, -130.21389
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Iron Cap MRDS details
Site Name
Primary: Iron Cap
Commodity
Primary: Silver
Primary: Gold
Primary: Copper
Primary: Zinc
Location
State: Alaska
District: Hyder
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: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Slate and graywacke country rocks are impregnated with sulfide minerals.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Chalcopyrite
Ore: Pyrrhotite
Ore: Sphalerite
Gangue: Calcite
Gangue: Quartz
Comments
Comment (Deposit): Model Name = Polymetallic veins
Comment (Deposit): Other Comments = Prospect originally staked in 1923.
Comment (Reference): Primary Reference = Buddington, 1929
Comment (Geology): Geologic Description = The country rocks in the area of the Iron Cap prospect are pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group, which is underlain and locally intruded by the Triassic Texas Creek Granodiorite (Smith, 1977; Koch, 1996).? the deposit (Buddington, 1929, p. 44, 98) consists of an 11-foot zone of slate and fine-grained tuffaceous graywacke containing stringers and veins of sulfides, and a 2-foot quartz-calcite vein carrying pyrrhotite, chalcopyrite, sphalerite, and a little arsenopyrite. The deposit, which is about 100 feet above the contact of the Texas Creek Granodiorite, is approximately parallel to the bedding in the slate and graywacke hostrocks. A sample (Buddington, 1925, p. 95) assayed 0.04 oz Au and 6.28 oz Ag per ton, and 2% Cu.
Comment (Exploration): Status = Inactive
Comment (Workings): Workings / Exploration = Deposit was explored in 1920's by an opencut 12 feet wide. A sample (Buddington, 1925, p. 95) assayed 0.04 oz Au and 6.28 oz Ag per ton, and 2% Cu.
References
Reference (Deposit): Buddington, A.F., 1925, Mineral investigations in southeastern Alasaka: U.S. Geological Survey Bulletin 773, p. 71-139.
Reference (Deposit): Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p.
Reference (Deposit): Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p.
Reference (Deposit): Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.
Reference (Deposit): Koch, R.D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-A, 35 p., 1 sheet, scale 1:250,000.
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