Unnamed (near southeast shoreline of Cemetery Cove)

The Unnamed (near southeast shoreline of Cemetery Cove) is a copper and molybdenum 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 southeast shoreline of Cemetery Cove)

Commodity

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

Location

State: Alaska
District: Aleutian Islands

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

Alteration Type: L
Alteration Text: The alteration consists of propylitization, along with localized silicification and pyritization.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite
Ore: Molybdenite
Ore: Gold
Ore: Chalcopyrite
Gangue: Quartz

Comments

Comment (Geology): Age = Tertiary.

Comment (Geology): Geologic Description = At this site a color anomaly, measuring approximately 11,000 by 1000 feet, is present along the shore and represents the weathering of a very well-developed quartz stockwork in a dacitic or rhyolitic flow (Christie, 1974). These rocks have been mapped as Tertiary to Quaternary in age (Byers, 1959). The stockwork consists of thin, generally barren, vuggy quartz veinlets in highly pyritized and silicified wall rock. The veinlets are continuous but appear to be randomly oriented. The stockwork itself contains 0 to10 percent pyrite and a trace of chalcopyrite. Metal values in 20 samples of quartz veins and pyritized wall rock contained up to 150 ppm copper, 21 ppm molybdenum, .03 ppm gold, 1.6 ppm silver, and 68 ppm zinc (Christie 1974). Forty-four samples collected at a later date contained up to 1130 ppm arsenic, 491 ppb gold, 2.8 ppm silver, 260 ppb mercury, and 94 ppm molybdenum (Randolph and Ellis, 1989).

Comment (Deposit): Other Comments = This site is located on lands selected by the the Aleut Native Corporation.

Comment (Workings): Workings / Exploration = Brief reconnaissance mapping and fairly extensive rock-chip sampling were done by the Aleut-Quintana-Duval JV in 1974. Twenty rock chip samples yielded up to 150 ppm copper, 21 ppm molybdenum, 150 ppm copper, 0.03 ppm gold, 1.6 ppm silver and 68 ppm zinc. Most higher gold values came from samples of quartz veinlets (Christie, 1974). Forty-four samples collected at a later date contained up to 1130 ppm arsenic, 491 ppb gold, 260 ppb mercury, 94 ppm molybdenum, and 2.8 ppm silver (Randolph and Ellis, 1989).

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Christie, 1974

Comment (Deposit): Model Name = Quartz stockwork with minor copper, molybdenum, zinc, and precious metal values.

References

Reference (Deposit): Randolph, D.B., and Ellis, W.T., 1989, Unalaska project, 1989 final report: Battle Mountain Exploration Company, Alaska District, 41 p., 5 appendices, 11 plates, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

Reference (Deposit): Byers, F.M, 1959, Geology of Umnak and Bogoslof Islands, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-L, p. 267-369, 3 map sheets, scale 1:63,360, 1:96,000, 1:300,000.

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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