The Unnamed (southeast of Blunt Mountain) is a silver, zinc, lead, copper, and gold 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, Zinc, Lead, Copper, Gold
Lat, Long: 55.12806, -131.37389
Map: View on Google Maps
Satelite View
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.
Unnamed (southeast of Blunt Mountain) MRDS details
Site Name
Primary: Unnamed (southeast of Blunt Mountain)
Commodity
Primary: Silver
Primary: Zinc
Primary: Lead
Primary: Copper
Primary: Gold
Secondary: Barium-Barite
Location
State: Alaska
District: Ketchikan
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: Rhyolite is sericitized and pyritic in shear zones and adjacent to quartz veins.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Hematite
Ore: Galena
Ore: Chalcopyrite
Ore: Barite
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = Berg, 1972 (I 684); Karl, 1992
Comment (Deposit): Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c)
Comment (Geology): Age = Probably Late Cretaceous or younger.
Comment (Geology): Geologic Description = The country rocks in the area of this site are recrystallized, Upper Triassic carbonate and clastic rocks, rhyolite, and basalt (Berg, 1972). The rocks are complexly folded and faulted, and were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time. All of the mineral deposits are hosted by metarhyolite and tuff.? the deposits consist of sparsely mineralized, sulfide-bearing, locally vuggy quartz veins up to 3 feet thick, in sheared, sericitized, and chloritized rhyolite and tuff (Berg, 1972, locs. 1, 2; Karl, 1992, locs. 30, 31). Some of the mineralized shear zones are up to 10 feet wide and have been traced on the surface for 40 feet. The chief sulfide mineral is pyrite, which also is sparsely disseminated in the altered rhyolite adjacent to the veins. Other sulfide minerals, inferred from sample assays, probably include galena, chalcopyrite, sphalerite, and barite. Minor hematite is reported in some of the veins.? the deposits were explored in the 1930s by a 110-foot-long, NE-trending adit, and in the 1970s by trenches, shallow pits, and soil surveys (Berg, 1972; Karl, 1992). Selected samples of mineralized quartz veins and stringers collected by the USGS in the 1930s contained up to 0.05 oz. Au/ton, 20.60 oz. Ag/ton, 4.63% Cu, 9.75% Pb, and 13.14% Zn (Berg, 1972. loc. 1). Samples of variously mineralized quartz veins and of altered rhyolite collected by the USGS in the early 1990s contained as much as 2.68 oz. Au/ton, 8.75 oz. Ag/ton, 200 ppm Cu, 1000 ppm Pb, 200 ppm Zn, and more than 5000 ppm Ba (Karl, 1992, locs. 30a, 31). A limonitic quartz vein sampled in the 1970s by private interests contained 0.93 oz. Au/ton; and soil samples that they collected contained up to 0.9 ppm Au (Karl, 1992, loc. 30c).
Comment (Workings): Workings / Exploration = The deposits were explored in the 1930s by a 110-foot-long, NE-trending adit, and in the 1970s by trenches, shallow pits, and soil surveys (Berg, 1972; Karl, 1992). Selected samples of mineralized quartz veins and stringers collected by the USGS in the 1930s contained up to 0.05 oz. Au/ton, 20.60 oz. Ag/ton, 4.63% Cu, 9.75% Pb, and 13.14% Zn (Berg, 1972. loc. 1). Samples of variously mineralized quartz veins and of altered rhyolite collected by the USGS in the early 1990s contained as much as 2.68 oz. Au/ton, 8.75 oz. Ag/ton, 200 ppm Cu, 1000 ppm Pb, 200 ppm Zn, and more than 5000 ppm Ba (Karl, 1992, locs. 30a, 31). A limonitic quartz vein sampled in the 1970s by private interests contained 0.93 oz. Au/ton; and soil samples that they collected contained up to 0.9 ppm Au (Karl, 1992, loc. 30c).
References
Reference (Deposit): Berg, H.C., 1972, Geologic map of Annette Island, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-684, 8 p., 1 sheet, scale 1:63,360,
Reference (Deposit): Karl, S.M., 1992, Map and table of mineral deposits on Annette Island, Alaska: U.S. Geological Survey Open-File Report 92-690, 57 p., 1 map, scale 1:63,360.
Reference (Deposit): Elliott, R.L., Berg, H.C., and Karl, Susan, 1978, map and table describing metalliferous and selected nonmetalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-file Report, 78-73-B,17 p., scale 1:250,000.
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
