Unnamed (near headwaters of Granite Creek)

The Unnamed (near headwaters of Granite Creek) is a zinc and lead 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 headwaters of Granite Creek)

Commodity

Primary: Zinc
Primary: Lead
Secondary: Tin
Secondary: Copper
Secondary: Silver

Location

State: Alaska
District: Koyuk

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

Model Name: Polymetallic veins

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: One of the samples here is described as oxidized quartz monzonite.

Rocks

Not available

Analytical Data

Not available

Materials

Gangue: Pyrite

Comments

Comment (Geology): Geologic Description = This occurrence is in the east part of the Windy Creek stock, a mid-Cretaceous composite pluton of quartz monzonite, monzonite, syenite and some melanite-bearing nepheline syenite (Miller and others, 1971; 1972). Latite and greenish quartz porphyry, both commonly pyritiferous, locally crosscut the alkalic phases of the Windy Creek stock. Two samples of pyritiferous quartz monzonite from this ridge crest have weakly anomalous lead values (150 ppm) and one contains 20 ppm Sn. A pyritiferous aphanitic dike from this ridge contains 150 ppm Cu, 700 ppm Pb, 700 ppm Zn, 15 ppm Sn, and 1 ppm Ag (Miller and others, 1971, Table 2). Molybdenum was detected at low levels in the aphanitic dike but was below detection in the other two samples. This occurrence primarily serves to illustrate that late, cross-cutting phases of the Windy Creek stock are mineralized compared to earlier, pyrite-bearing phases.

Comment (Reference): Primary Reference = Miller and others, 1971

Comment (Workings): Workings / Exploration = None; propecting has primarily been on the west side of the Windy Creek stock (see BN094).

Comment (Geology): Age = Mid-Cretaceous; the Windy Creek stock is inferred to be mid-Cretaceous based on similarities to the Granite Mountain stock to the east in the Candle quadrangle (Miller and others, 1971).

Comment (Deposit): Model Name = Polymetallic sulfide mineralization in quartz monzonite

Comment (Exploration): Status = Inactive

References

Reference (Deposit): Miller, T.P., Elliott, R.L., Grybeck, D.J., and Hudson, T.L., 1971, Results of geochemical sampling in the northern Darby Mountains, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 478, 12 p.

Reference (Deposit): Miller, T.P., Grybeck, D.J., Elliott, R.L., and Hudson, T.L., 1972, Preliminary geologic map of the eastern Solomon and southeastern Bendeleben quadrangles, eastern Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 72-256, 11 p.

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