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Unnamed (hill 1690)

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. Host and associated rocks
  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 10001956
MRDS ID A012794
Record type Site
Current site name Unnamed (hill 1690)

Geographic coordinates

Geographic coordinates: -165.21998, 64.87762 (WGS84)
Relative position This occurrence is on the north-facing slope of hill 1690 (locally called Copper Mountain) at an elevation of 1,150 feet. It is 0.8 mile south of the Nome-Taylor road near the divide between the Nome River and Salmon Lake drainages. It is locality 26 of Hummel (1962 [MF 248]).

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

Materials information

Materials Type of material
Scheelite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock
  • Host or associated Host
    Rock type Metamorphic Rock > Schist > Calc-Silicate Schist

Nearby scientific data

(1) -165.21998, 64.87762
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Hummel (1962 [MF 248]) noted that scheelite is present at this locality. The scheelite could be in veins crosscutting the metamorphic host rocks or in older pre-metamorphic tactite deposits (see NM027, NM035, NM041, and NM044). Bedrock in the area is primarily calc-schist with some chloritic and mafic schist, marble, and small orthogneiss bodies (Thurston, 1985, figure 3A). An orthogneiss body 4.5 miles to the northeast has been determined to have a 678 Ma protolith age (Amato and Wright, 1998). The metamorphic rocks are part of the Nome Group and derived from Precambrian to early Paleozoic protoliths (Till and Dumoulin, 1994).? the Nome Group underwent regional blueschist facies metamorphism in the Late Jurassic or Early Cretaceous (Sainsbury, Coleman, and Kachadoorian, 1970; Forbes and others, 1984; Thurston, 1985; Armstrong and others, 1986; Hannula and McWilliams, 1995). The blueschist facies rocks were recrystallized to greenschist facies or higher metamorphic grades in conjunction with regional extension, crustal melting, and magmatism in the mid-Cretaceous (Hudson and Arth, 1983; Miller and Hudson, 1991; Miller and others, 1992; Dumitru and others, 1995; Hannula and others, 1995; Hudson, 1994; Amato and others, 1994; Amato and Wright, 1997, 1998). Lode gold mineralization (and related quartz-scheelite veining) on Seward Peninsula is mostly related to the higher temperature metamorphism in the mid-Cretaceous (Apodoca, 1994; Ford, 1993 [thesis]; Ford and Snee, 1996; Goldfarb and others, 1997). A late Proterozoic age, however, is possible for scheelite tactite deposits affiliated with orthogneiss.
  • Age = Late Proterozoic, early Paleozoic, or mid-Cretaceous.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Nome

Comments on the workings information

  • Workings / Exploration = Some small prospecting pits may be present.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Hummel, 1962 (MF-248)

General comments

Subject category Comment text
Deposit Model Name = Scheelite in veins or disseminated in metamorphic rocks.

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.