1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Pupinski

Prospect in Alaska, United States with commodities Silver, Tin, Copper, Tungsten
Map
XML
JSON
KML
C
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Alteration
  7. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10308503
MRDS ID A012430
Record type Site
Current site name Pupinski
Related records 10001655, 10112589

Geographic coordinates

Geographic coordinates: -154.72184, 63.23837 (WGS84)
Relative position The Pupinski prospect is located near the saddle north of Encio Gulch at an elevation of 1,500 feet (457 m) in Section 18, T. 26 S., R. 22 E., of the Kateel River Meridian. The reporter visited the site in 1989 and 1996.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Medfra A-4(quadrangle 1:63,360 scale)

Medfra S(quadrangle 1:100,000 scale)

Medfra C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Stony River(hydrologic unit)

Upper Kuskokwim River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Doyon, Limited(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
Tin Critical Primary
Copper Secondary
Tungsten Critical Secondary

Alteration

  • (Local) Sericite and tourmaline.

Mineral occurrence model information

Model code 121
USGS model code 39c
Deposit model name Shoreline placer Ti

Nearby scientific data

(1) -154.72184, 63.23837
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Pupinski prospect is along the southeastern margin of the Nixon Fork monzonite stock (Bundtzen and Miller, 1997). It consists of a magnetite-sulfide skarn that differs from the Nixon Fork Mine showings (MD062) in that gold is absent and copper, silver, tin and minor tungsten values are elevated. Cassiterite is locally abundant in late stage veins, and in association with tourmaline. The Pupinski deposit has only been briefly explored. Age of mineralization is probably Upper Cretaceous based on isotopic age (68.0 Ma) of Nixon Fork pluton (Moll and others, 1981; Bundtzen and Miller, 1997). Grab samples collected at the site contain up to 262 ppm silver, 3.00 percent copper, 0.35 percent tin, and 120 ppm tungsten (Bundtzen and Miller, 1997; Ted Almasy, personal communication, 1998).
  • Age = Quaternary
  • Age = Age of mineralization is probably Upper Cretaceous, based on isotopic age of Nixon Fork pluton (Moll and others, 1981).

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Comments on the workings information

  • Workings / Exploration = The Pupinski deposit has only been briefly explored, mainly by Central Alaska Gold Company in the early 1990s (Ted Almasy, personal communication, 1998). Grab samples collected at the site contain up to 262 ppm silver, 3.00 percent copper, 0.35 percent tin, and 120 ppm tungsten (Bundtzen and Miller, 1997; Ted Almasy, personal communication, 1998).

Reference information

Bibliographic references

  • Deposit

    Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Economic Geology Monograph #9, Mineral Deposits of Alaska, p. 242-286.

Comments on the references

  • Primary Reference = Bundtzen and Miller, 1997

General comments

Subject category Comment text
Deposit Model Name = Polymetallic tin (Cox and Singer, 1986; model no. 20b)
Deposit Other Comments = See Win Deposit (MD060). The Pupinski prospect is on land conveyed to Doyon Ltd. For further information, contact Doyon Ltd at 210 1st Ave., Fairbanks, Alaska, 99701.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-JUN-98 Bundtzen, T.K. 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.