The Cathedral is a silver, gold, copper, lead, 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, Lead, Zinc
Lat, Long: 56.075, -130.28500
Map: View on Google Maps
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Cathedral MRDS details
Site Name
Primary: Cathedral
Commodity
Primary: Silver
Primary: Gold
Primary: Copper
Primary: Lead
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: Locally intense iron staining.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Galena
Ore: Pyrite
Ore: Pyrrhotite
Ore: Sphalerite
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = Berg and others, 1977
Comment (Workings): Workings / Exploration = Early workings included an approximately 10-foot-long stripped area. ? Channel samples collected in 1972 by the U. S. Bureau of Mines across the full width of the thickest (5-foot) vein and its 7-inch-thick footwall massive sulfide zone averaged 70 ppm Ag, 0.17% Cu, 0.75% Pb, and 7.5% Zn. A channel sample only of the massive sulfide contained 4.4 oz Ag per ton, 0.27% Cu, 0.9% Pb, and 35% Zn. One analysis showed 0.05 ppm Au. Samples of a smaller (2.5-inch-thick) sulfide-bearing vein assayed 20 oz Ag per ton, 19% Pb, and 9% Zn.
Comment (Deposit): Other Comments = Four claims staked in 1930 probably covered this prospect.?Site is in Misty Fiords National Monument.
Comment (Exploration): Status = Inactive
Comment (Deposit): Model Name = Polymetallic veins
Comment (Geology): Geologic Description = The country rocks in the area of the Cathedral prospect include pelitic metasedimentary strata of the Jurassic or older Mesozic Hazelton Group; the Triassic Texas Creek Granodiorite, which underlies and locally intrudes the Hazelton; and the Eocene Hyder Quartz Monzonite, which intrudes the Hazelton and Texas Creek rocks (Berg and others, 1977, p. 15-18, 22-23; Smith, 1977; Koch, 1996).? the deposit (Berg and others, 1977, p. 38-39, 90-91; Elliott and Koch, p. 11, loc. 25) consists of quartz fissure veins up to about 5 feet thick in graywacke hornfels. The veins contain shoots of nearly massive sphalerite and (or) galena, together with subordinate amounts of chalcopyrite, pyrite, and pyrrhotite.? Channel samples collected in 1972 by the U. S. Bureau of Mines across the full width of the thickest (5-foot) vein and its 7-inch-thick footwall massive sulfide zone averaged 70 ppm Ag, 0.17% Cu, 0.75% Pb, and 7.5% Zn. A channel sample only of the massive sulfide contained 4.4 oz Ag per ton, 0.27% Cu, 0.9% Pb, and 35% Zn. One analysis showed 0.05 ppm Au. Samples of a smaller (2.5-inch-thick) sulfide-bearing vein assayed 20 oz Ag per ton, 19% Pb, and 9% Zn.
References
Reference (Deposit): Berg, H.C., Elliott, R.L., Smith, J.G., Pittman, T.L., and Kimball, A. L., 1977, Mineral resources of the Granite Fiords wilderness study area, Alaska, with a section on aeromagnetic data by Andrew Griscom: U.S. Geological Survey Bulletin 1403, 151 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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