Ningyoyak Creek, EXP Prospect

Prospect in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001193
MRDS ID A011903
Record type Site
Current site name Ningyoyak Creek, EXP Prospect

Geographic coordinates

Geographic coordinates: -156.31356, 67.87958 (WGS84)
Relative position Located on ridge just north of Ningyoyak Creek in T. 29 N., R. 11 E., Kateel River Meridian. Location accurate to within 2000 ft. (600 m). Shown as locality 64 in Mayfield and Grybeck (1978).???
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Geographic areas

Country State
United States Alaska


Commodity Importance
Copper Primary

Materials information

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

Mineral occurrence model information

Model code 72
USGS model code 19a
Deposit model name Polymetallic replacement
Mark3 model number 47

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Phyllite
    Rock unit name Hunt Fork Shale; Black Shale, Slate And Phyllite Interbedded With Sandstone, Quartzite & Limestone
    Rock description Hunt Fork Shale; Black Shale, Slate And Phyllite Interbedded With Sandstone, Quartzite & Limestone
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Late Devonian

Nearby scientific data

(1) -156.31356, 67.87958

Comments on the geologic information

  • Geologic Description = Malachite and chalcopyrite in quartz-carbonate stringers (veins). Deposit crops out within an area 100 ft. by 75 ft. (30 m by 15 m), and is known depth to a depth of 10 ft (3 m)( Degenhart and others, 1978, p. 373-377).

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Noatak

Comments on the workings information

  • Workings / Exploration = Surface workings including trenching. Two rock samples reported by Degenhart and others (1978, p. 381-382), to assay 0.14% and 0.44% Cu respectively.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011903
USGS Alaska Resource Data File ARDF AR062

Bibliographic references

  • 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

    Mayfield, C.F. and Grybeck, D., 1978, Mineral occurrences and resource map of the Ambler river quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-120I, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Mayfield and Grybeck, 1978

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Schmidt and Werdon, 1993)

Reporter information

Type Date Name Affiliation Comment
Reporter 28-APR-1997 K.R. Leonard U.S. Geological Survey
Reporter 28-APR-1997 R.L. Elliott U.S. Geological Survey
Reporter 28-APR-1997 J.M. Schmidt U.S. Geological Survey
Reporter 28-APR-1997 S.W. Nelson U.S. Geological Survey