Unnamed (near Chitsia Mountain)

The Unnamed (near Chitsia Mountain) is a lead and silver 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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Site Name

Primary: Unnamed (near Chitsia Mountain)

Commodity

Primary: Lead
Primary: Silver
Secondary: Zinc
Secondary: Gold

Location

State: Alaska
District: Kantishna

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

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Role: Host
Age Type: Host Rock
Age Young: Middle Mississippian
Age Old: Early Devonian

Analytical Data

Not available

Materials

Ore: Galena
Gangue: Quartz

Comments

Comment (Geology): Age = Younger than the Middle Devonian to Early Mississippian Totatlanika Schist; probably related to Cretaceous to Tertiary plutonism.

Comment (Geology): Age = Host rock is Early Mississippian - Middle Devonian.

Comment (Deposit): Model Name = Plutonic-related mesothermal, shear-hosted veining.

Comment (Exploration): Status = Inactive

Comment (Geology): Geologic Description = The Chitsia Mountain area is underlain by Middle Devonian to Early Mississippian Totatlanika Schist (Wilson and others, 1998). This formation consists of slightly metamorphosed volcanic sedimentary rocks, including various phyllites, silicified greenschist, and nonresistant greenschist tuffs. It is intruded by resistant porphyro-aphanitic rhyolite (Bundtzen and others, 1976). Regionally, the area contains a system of northeast-trending strike-slip and related conjugate faults associated with Cretaceous to Tertiary plutonic rocks and coeval or younger volcanic rocks (Clautice and others, 1993). ? the three occurrences consist of a quartz vein system trending N55E and dipping 55 degrees SE, hosted in the rhyolite. The quartz veins locally contain limonite and galena. A sulfide-bearing quartz vein sample was assayed by atomic absorption and contained 0.05 ounces Ag per ton, 0.01 ounces Au per ton, less than 0.01 percent Cu, 0.01percent Pb, 0.02 percent Zn, less than 0.01 percent Mo, and less than 0.01percent Sb. A stream-sediment sample collected near the rhyolite was assayed by atomic absorption and contained 0.03 ppm Au, 34 ppm Cu, 24 ppm Pb, 125 ppm Zn, and 1.10 ppm Ag (Bundtzen and others, 1976). These areas of base-metal vein mineralization in rhyolite are interpreted to have potential for large low-grade and smaller high-grade metallic deposits (Bundtzen and others, 1976). There are no indications of production.

Comment (Reference): Primary Reference = Bundtzen and others, 1976

Comment (Production): Production Notes = There are no indications of production.

References

Reference (Deposit): Chapman, R.M., 1975, Geology of western half of the Kantishna River quadrangle: U.S. Geological Survey Circular 722, 58 p.

Reference (Deposit): Bundtzen, T.K., Smith, T.E., and Tosdal, R.M., 1976, Progress report: Geology and mineral deposits of the Kantishna Hills, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-98, 80 p., 2 sheets, scale 1:63,360.

Reference (Deposit): Chapman, R.M., and Yeend, W., 1981, Geologic reconnaissance of the east half of the Kantishna River quadrangle and adjacent areas, in Albert, N.R.D., and Hudson, T., eds, The United States Geological Survey in Alaska, Accomplishments during 1979: U.S. Geological Survey Circular 823-B, 149 p.

Reference (Deposit): Cobb, E.H., and Chapman, R.M., 1981, Mineral occurrences (other than mineral fuels and construction materials) in the Kantishna River and Ruby quadrangles, Alaska: U.S. Geological Survey Open-File Report 81-170, 94 p.

Reference (Deposit): Clautice, K.H., Bowman, N.D., Clough, J.G., Gilbert, W.G., Kline, J.T., Smith, T.E., and Blodgett, R.B., 1993, Land selection Unit 8 (Kantishna River, Ruby, and Medfra quadrangles): References, lead isotope, geochemical and major oxide data: Alaska Division of Geological and Geophysical Surveys, 42 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Wilson, F.H., Dover, J.H., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J., 1998, Geologic map of central (interior) Alaska: U.S. Geological Survey Open-File Report 98-133, 17 p., 2 sheetsm, scale 1:500,000.

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