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  3. Mineral Resource Data System (MRDS)

Sheep Creek-South

Occurrence in Alaska, United States with commodities Zinc, Iron, Lead
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10002593
MRDS ID A015030
Record type Site
Current site name Sheep Creek-South
Related records 10234212

Geographic coordinates

Geographic coordinates: -153.79478, 62.31642 (WGS84)
Relative position The Sheep Creek-South occurrence is located on the east side of the upper Sheep Creek valley at an elevation of 3,300 feet (1,006 meters) in the NE1/4 sec. 30, T. 26 N., R. 24 W., of the Seward Meridian. The reporter visited the site in 1981.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

McGrath B-2(quadrangle 1:63,360 scale)

McGrath SE(quadrangle 1:100,000 scale)

McGrath(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Kuskokwim River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Cook Inlet Region, Incorporated(ANCSA Region)

ANCSA Region NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Zinc Critical Primary
Iron Secondary
Lead Secondary

Materials information

Materials Type of material
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Quartz Gangue

Alteration

  • (Local) None recognized.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Monzonite
    Stratigraphic age (youngest) Pliocene
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock

Nearby scientific data

(1) -153.79478, 62.31642
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = At the Sheep Creek occurrence, sphalerite occurs in small lenses along shear zones in dikes near the north side of a small stock that cuts limestone and siltstone of the mid-Silurian Terra Cotta Mountains Sandstone, a formation within the Dillinger subterrane (Bundtzen, Harris, and Gilbert, 1997). According to Reed and Elliott (1968, C 596), selected grab samples contain up to 5.00 percent zinc.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = Only surface sampling data is available from the occurrence. According to Reed and Elliott (1968, C 596), selected grab samples contain up to 5.00 percent zinc.

Reference information

Comments on the references

  • Primary Reference = Reed and Elliott, 1968 (C 596)

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c).

Reporter information

Type Date Name Affiliation Comment
Reporter 06-NOV-1998 T.K. Bundtzen Pacific Rim Geological Consulting

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.