Unnamed

The Unnamed is a gold, silver, and copper 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

Commodity

Primary: Gold
Primary: Silver
Primary: Copper
Secondary: Zinc

Location

State: Alaska
District: Alaska Peninsula

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: Epithermal vein, generic

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Propylitic alteration is present to a moderate extent in the diorite and may be more common in the volcanic rocks. Hydrothermal minerals include chlorite, epidote, clay, and locally magnetite.

Rocks

Name: Volcanic Rock (Aphanitic)
Role: Host
Age Type: Host Rock
Age Young: Pliocene

Name: Volcanic Rock (Aphanitic)
Role: Host
Age Type: Associated Rock
Age Young: Pliocene

Analytical Data

Not available

Materials

Ore: Pyrite
Gangue: Magnetite

Comments

Comment (Workings): Workings / Exploration = Christie (1974) reports brief reconnaissance geologic mapping and the collection of more than 30 soil and silt samples. Copper content typically was less than 50 ppm, although one sample yielded 101 ppm. Zinc ranged as high as 490 ppm, silver to 4.1 ppm and gold to 0.03 ppm.

Comment (Geology): Geologic Description = Christie (1974) briefly examined an east-west oriented 1 by 4 mi (1.6 by 6.4 km) color anomaly. The anomaly occurs in andesitic volcanic rocks, that include flows, pyroclastic rocks and breccia intruded in the center of the anomaly by a medium-grained dioritic pluton, on the east by a feldspar porphyry and on the west by minor diorite dikes. At east end of the color anomaly, a large covered area 1 mi (1.6 km) wide of indeterminate length may expand the occurrence. Volcanic rocks contain disseminated and fracture-controlled pyrite; mineralization does not increase at contact with the diorite. Both the diorite and volcanic rocks are cross-cut by thin breccia zones composed of severely leached and bleached angular wall rocks in a matrix of iron oxide. At western end of the anomaly, pyrite concentrations are highest in pyroclastic rock and breccia units.

Comment (Deposit): Other Comments = No quartz veins are mentioned by Christie (1974), but this does not indicate that they are absent, inasmuch as his focus was mainly on porphyry mineralization.

Comment (Deposit): Model Name = Epithermal gold vein

Comment (Reference): Primary Reference = Christie, 1974

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Miocene or younger

References

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)

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