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Tin Creek-South

Occurrence in Alaska, United States with commodities Silver, Copper, Lead, Zinc, Bismuth, Cobalt, Cadmium
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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. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10307855
Record type Site
Current site name Tin Creek-South

Geographic coordinates

Geographic coordinates: -153.65884, 62.37448 (WGS84)
Relative position The Tin Creek-South occurrence is situated on a high, rugged, north-to-northeast trending ridgeline about 5 kilometers southwest of Veleska Lake at an elevation of 5,300 feet (1,615 m) in the NW1/4 sec. 1, T. 26 N., R. 24 W., of the Seward Meridian. The reporter visited the occurrence in 1981 (at station no. 81BT484).

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
Silver Primary
Copper Primary
Lead Primary
Zinc Critical Primary
Bismuth Critical Secondary
Cobalt Critical Secondary
Cadmium Secondary

Materials information

Materials Type of material
Galena Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Diopside Gangue
Garnet Gangue

Mineral occurrence model information

Model code 60
USGS model code 18c
Deposit model name Skarn Zn-Pb
Mark3 model number 22

Nearby scientific data

(1) -153.65884, 62.37448
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Tin Creek-South occurrence is a high-grade, sulfide-bearing, diopside-garnet skarn zone associated with a complex, east-west trending dike swarm. The dikes cut the Late Cretaceous Veleska Lake Volcanic Field and the older Cambrian to Devonian Dillinger subterrane (Bundtzen, Kline, and Clough, 1982; Bundtzen, Harris, and Gilbert, 1997). The dikes have not been dated, but are younger than the 65 Ma Veleska Lake Volcanic Field. Massive sphalerite veins are encased in a diopside-rich garnet skarn zone within a carbonate xenolith less than 2 meters thick. Because the exposure is in rubble-crop, the zone's orientation is unknown. Analytical data summarized by Bundtzen, Harris, and Gilbert (1997) indicate up to 0.04 percent copper, 1.30 percent lead, 14.70 percent zinc, 58.0 grams/tonne silver, 300 ppm cobalt, 200 ppm cadmium, and 1,000 ppm bismuth.
  • Age = Unknown; younger than 65 Ma Veleska Lake Volcanic Field.

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 = The Tin Creek-South occurrence was investigated by the reporter for the Alaska Division of Geological and Geophysical Surveys in 1980 (Bundtzen, Kline, and Clough, 1982). Analytical data summarized by Bundtzen, Harris, and Gilbert (1997) indicate up to 0.04 percent copper, 1.30 percent lead, 14.70 percent zinc, 58.0 grams/tonne silver, 300 ppm cobalt, 200 ppm cadmium, and 1,000 ppm bismuth.

Reference information

Comments on the references

  • Primary Reference = Bundtzen, Harris, and Gilbert, 1997

General comments

Subject category Comment text
Deposit Model Name = Low temperature lead-zinc skarn (Cox and Singer, 1986; model 18c).

Reporter information

Type Date Name Affiliation Comment
Reporter 05-DEC-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.