Unnamed (on north side of Dillon Creek)

The Unnamed (on north side of Dillon Creek) is a copper, silver, 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 (on north side of Dillon Creek)

Commodity

Primary: Copper
Primary: Silver
Primary: Zinc
Primary: Lead

Location

State: Alaska
District: Council

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
Model Name: Skarn Zn-Pb

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Oxidation of sulfides has occurred.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Azurite
Ore: Bornite
Ore: Chalcopyrite
Ore: Malachite

Comments

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Zn-Pb skarn? Polymetallic vein ? (Cox and Singer, 1986; model 18c or 22c ?)

Comment (Reference): Primary Reference = Gamble, 1988

Comment (Workings): Workings / Exploration = No workings are known at this locality.

Comment (Deposit): Model Number = 18c ?, 22c ?

Comment (Geology): Geologic Description = Gossan float from near calc-silicate hornfels outcrops contains azurite, bornite (?), chalcopyrite, and malachite. Two grab samples contain 100 ppm Ag each, 700 and 110 ppm Cd, greater than 2 % Pb, 3.4 % and 8,000 ppm Zn, and 12 and 14 ppm Sb (Gamble, 1988). There is also some malachite staining in a felsic dike near this locality (Briskey, 1983). This occurrence, and several others in this part of the Bendeleben A-4 quadrangle, are in high grade metamorphic rocks that are structurally above or peripheral to the crosscutting Pargon pluton. The Pargon pluton is mostly granodiorite and assumed to be Cretaceous in age (Till and others, 1986). It was emplaced at shallower depths than the more deep-seated Bendeleben pluton to the east. The metamorphic rocks peripheral to the western Pargon pluton are also intruded by small, felsic dikes and plugs including quartz porphyry and muscovite granite.

Comment (Geology): Age = Cretaceous; this occurrence is probably related to emplacement of the Pargon pluton which is assumed to be Cretaceous in age.

References

Reference (Deposit): Briskey, J.A., 1983, Summary of field observations on Seward Peninsula mineral deposits: U.S. Geological Survey, unpublished administrative report, 34 p.

Reference (Deposit): Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.

Reference (Deposit): Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000.

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