Hub

Prospect in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10003090
MRDS ID A015619
Record type Site
Current site name Hub
Related records 10209035

Geographic coordinates

Geographic coordinates: -159.61362, 67.7595 (WGS84)
Relative position The Hub prospect is at an elevation of about 1,850 feet in a small, north-facing valley about 3 miles east of the junction of Kanaktok Creek and the Salmon River. It is in section 5, T. 27 N., R.4 W., of the Kateel River Meridian. Schmidt and Allegro (1988), locations 34 and 35.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Malachite Ore
Pyrite Ore
Calcite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Skajit Limestone
    Rock description Skajit Limestone

Nearby scientific data

(1) -159.61362, 67.7595

Comments on the geologic information

  • Geologic Description = Bedrock at the Hub prospect is Devonian Skajit limestone and dolomite underlain by green phyllite. The Skajit limestone in this area is bounded on the east, west and north by lower Paleozoic schists and phyllites (Schmidt and Allegro, 1988). Some chalcopyrite and malachite occur in stream float in the upper reaches of the Salmon River. Follow-up work identified copper minerals in two outcrops about 1,000 feet apart. The minerals are in small, quartz-calcite veins that cut dolomite. Rock units strike N. 30 W. and dip 50 degrees W.? A rock sample from the east side of the valley assayed 0.35% Cu and a rock sample from the west side assayed 1.1% Cu. Stream silt samples failed to detect anomalous copper. This may be attributed to the abundance of carbonate rocks in this area which may suppress chemical transport of metal ions (Degenhart and others, 1978).
  • Age = Devonian

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Kiana

Comments on the workings information

  • Workings / Exploration = Selected samples from the mineralized veins contained 1.1% Cu, 0.9-2.2 ppm Ag and 5 ppb Au (Degenhart and others, 1978).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015619
USGS Alaska Resource Data File ARDF BM018

Bibliographic references

  • Deposit

    Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.

  • Deposit

    Degenhart, C.E., Griffis, R.J., McQuat, J.F., and Bigelow, C.G., 1978, Mineral studies of the western Brooks Range performed under contract to the U.S. Bureau of Mines, Contract #JO155089: U.S. Bureau of Mines Open-File Report 103-78, 529 p., 11 sheets.

  • Deposit

    Schmidt, J.M., and Allegro, G.L., 1988, Map showing mineral occurrences and indicators in the Baird Mountains quadrangle, northwestern Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1992, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., Mayfield, C.F., and Brosge, W.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in eleven quadrangles in northern Alaska (Arctic, Baird Mountains, Chandler Lake, DeLong Mountains, Demarcation Point, Howard Pass, Misheguk Mountain, Mount Michelson, Noatak, Point Lay, and Table Mountain); Supplement to Open-File Report 75-628; Part A, Summaries of data to January 1, 1981: U.S. Geological Survey Open-File Report 81-767-A, 25 p.

Comments on the references

  • Primary Reference = Degenhart and others, 1978

General comments

Subject category Comment text
Deposit Model Name = Sulfide-bearing quartz calcite veins cutting limestone.
Deposit Other Comments = This occurrence is located within the Kobuk Valley National Park.

Reporter information

Type Date Name Affiliation Comment
Reporter 29-DEC-99 Williams, Anita U.S. Geological Survey