1. Mineral Resources
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  3. Mineral Resource Data System (MRDS)

Unnamed (near North Star Creek)

Occurrence in Alaska, United States with commodity Tungsten
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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 10001952
MRDS ID A012789
Record type Site
Current site name Unnamed (near North Star Creek)

Geographic coordinates

Geographic coordinates: -165.37609, 64.91429 (WGS84)
Relative position This tactite is on a sharp ridge between North Star Creek and upper Sinuk River. It is in the NW1/ NW1/4 section 6, T. 7 S., R. 33 W. , Kateel River Meridian. This is locality 13 of Cobb (1972 [MF 463], 1978 [OFR 78-93]), locality 40 of Hummel (1962 [MF 248]), and locality 79 of Hummel (1975). The location is accurate within about 1,000 feet of the coordinates.

Site location context

Political divisions (FIPS codes)

Nome(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nome D-1(quadrangle 1:63,360 scale)

Solomon NW(quadrangle 1:100,000 scale)

Nome(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Nome(hydrologic unit)

Norton Sound(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Tungsten Critical Primary

Comments on the commodity information

  • Gangue = Calc-silicate minerals

Materials information

Materials Type of material
Scheelite Ore

Alteration

  • (Local) Recrystallized calc-silicate assemblages.

Mineral occurrence model information

Model code 42
USGS model code 14a
Deposit model name W skarn

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss

Nearby scientific data

(1) -165.37609, 64.91429
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This is one of four tactite occurrences (this occurrence, NM027, NM035, and NM044) identifed by Hummel (1961) in the central and southern Kigluaik Mountains. The calc-silicate assemblages that are the hosts of the tactite are interpreted to have been metamorphosed along with their country rocks by Hummel. Scheelite is present in all four occurrences, and galena and sphalerite accompany scheelite in one (NM044).? This occurrence is in amphibolite facies metasedimentary rocks along the south contact of the Thompson Creek orthogneiss (Hummel, 1962 [MF 248]; Till, 1980). The Thompson Creek orthogneiss has been determined to have a Late Proterozoic protolith (555 Ma, Amato and Wright, 1998). The metasedimentary rocks south of the Thompson Creek orthogneiss are considered to have Precambrian or early Paleozoic protoliths (Till and Dumoulin, 1994). They are thought to have undergone regional high-pressure metamorphism along with many other rocks of Seward Peninsula in the Late Jurassic or Early Cretaceous (Sainsbury, Coleman, and Kachadoorian, 1970; Forbes and others, 1984; Thurston, 1985; Patrick, 1988; Patrick and Evans, 1989; Armstrong and others, 1986; Hannula and McWilliams, 1995). Higher temperature metamorphism overprinted these rocks in conjunction with regional extension, crustal melting, and magmatism in the mid-Cretaceous (Throckmorton and Hummel, 1979; Till, 1983; Evans and Patrick, 1987; Leiberman, 1988; Patrick and Leiberman, 1988; Miller and Hudson, 1991; Miller and others, 1992; Dumitru and others, 1995; Hannula and others, 1995; Hudson and Arth, 1983; Hudson, 1994; Amato and others, 1994; Amato and Wright, 1997, 1998). Uplift of the higher temperature metamorphic rocks took place in the mid- to Late Cretaceous and in the Eocene (Calvert, 1992; Dumitru and others, 1995).
  • Age = Late Proterozoic ; may be the same age as the Thompson Creek orthogneiss.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Probably inactive

Mining district

District name Nome

Comments on the workings information

  • Workings / Exploration = No workings are known at this locality.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Hummel, 1962 (MF 248)

General comments

Subject category Comment text
Deposit Model Name = W skarn deposit (Cox and Singer, 1986; model 14a).

Reporter information

Type Date Name Affiliation Comment
Reporter 22-OCT-99 Hawley, C.C. Hawley Resource Group
Reporter 22-OCT-99 Travis L. Hudson Hawley Resource Group

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.