Unnamed Occurrence

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10001220
MRDS ID A011933
Record type Site
Current site name Unnamed Occurrence
Alternate or previous names Sheep Creek

Geographic coordinates

Geographic coordinates: -151.92479, 67.58272 (WGS84)
(click for info)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USBM OFR 103-78, FIG. 31, BM 1533 LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Malachite Ore

Analytical data

Result 5700 PPM CU, 31 PPM PB, 79 PPM ZN, 3 PPM MO, 3.4 PPM AG, 10 PPB AU, ROCK SAMPLE BM 1533, USBM OFR 103-78, P. 476

Host and associated rocks

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

Nearby scientific data

(1) -151.92479, 67.58272

Geologic structures

Type of structure Regional
Structure description Major Thrust Fault

Ore body information

  • General form PODIFORM

Comments on the geologic information

  • DEPOSITS LIE ALONG THRUST FAULT SEPARATING MIDDLE DEVONIAN SKAJIT LIMESTONE AND UNDERLYING UPPER DEVONIAN CHLORITIC SCHIST

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Koyukuk

Land status

Ownership category National Park

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011933

Bibliographic references

  • Deposit

    USBM OFR 103-78, P. 140, 470-477

General comments

Subject category Comment text
Deposit SEE ALSO: DEPOSIT NO. MF-6 ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Deposit ZONE OF PROBABLE STRATIFORM DEPOSITS IS PRESENT FROM APPROXIMATELY 5 MI SW OF VABM ALLEN TO THIS LOCATION; EXTENT OF INDIVIDUAL MINERAL OCCURRENCES NOT MORE THAN 5 FT BY A FEW TENS OF FT ALONG STRIKE; MINERALIZATION CONSISTS OF MALACHITE, AZURITE AND CHALCOPYRITE DISSEMINATED IN SCHIST AND IN SMALL PODS IN LIMESTONE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1986 Leonard, Kenneth R. (Elliott, R. L.) U.S. Geological Survey
Editor 14-APR-1994 Mosier, Dan U.S. Geological Survey