Unnamed (Middle Fork Chandalar River)

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001731
MRDS ID A012515
Record type Site
Current site name Unnamed (Middle Fork Chandalar River)

Geographic coordinates

Geographic coordinates: -147.66336, 68.17977 (WGS84)
Relative position Site is at an elevation of about 4,700 ft. approximately 1 1/4 miles east of Beaucoup Creek (SE1/4 sec. 35, T. 14 S., R. 19 E., of the Umiat Meridian). Location accurate within 1-mile radius.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Quartz Gangue

Nearby scientific data

(1) -147.66336, 68.17977

Comments on the geologic information

  • Geologic Description = Occurrence described only as visible chalcopyrite and anomalous silver occurring in a quartz vein in Skajit Limestone beneath the contact with the Beaucoup Formation (Menzie and others, 1985). The area is mapped as the conglomerate member of Beaucoup formation (Menzie and others, 1985).

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chandalar

Comments on the reserve resource information

  • Reserves = See Additional comments below.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012515
USGS Alaska Resource Data File ARDF PS002

Bibliographic references

  • Deposit

    Cathrall, J.B., Cooley, E.F., Detra, D.E., and O'Leary, R.M., 1977, A listing and statistical summary of spectrographic and chemical analysis of stream-sediment and rock samples from the Philip Smith Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 77-244, 79 p.

  • Deposit

    Proffett, John, 1977, Progress Report - Atigun Project: Anaconda Company files, memo to D.A. Heatwole, July 31, 1977, 3 p. (Report held at the University of Wyoming, American Heritage Center, Anaconda Geologic Documents Collection)

  • Deposit

    Brosgi, W.P., Reiser, H. N., Dutro, J. T., Jr., and Detterman, R. L., 1979, Bedrock geologic map of the Philip Smith Mountains quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-879-B, 2 sheets, scale 1:250,000.

  • Deposit

    Menzie, W.D., Reiser, H.N., Brosgi, W.P., and Detterman, R.L., 1985, Map showing distribution of mineral resources (excepting oil and gas) in the Philip Smith Mountains quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Investigations Map MF-879-C, 2 sheets, scale 1:250,000.

Comments on the references

  • Primary Reference = Menzie and others, 1985

General comments

Subject category Comment text
Deposit Other Comments = May be same location described by Proffett (1977) as a 'steep North-South striking, cross cutting quartz vein with coarse chalcopyrite. The ore-bearing part is 1 to 3 ft. wide and may average 5 to 10 percent copper. The vein is more than 1,000 ft. in strike length.' Proffett (1977) also estimated that the occurrence 'may have potential for 10,000 - 100,000 ton' deposit. Cathrall and other (1977) reported 1 ppm Ag in a rock sample (sample number 75 RR 121).

Reporter information

Type Date Name Affiliation Comment
Reporter 17-NOV-1999 J.M. Britton U.S. Geological Survey