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Unnamed (near Mt. Kachauik)

Occurrence in Alaska, United States with commodities Tungsten, Beryllium
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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. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10308295
Record type Site
Current site name Unnamed (near Mt. Kachauik)

Geographic coordinates

Geographic coordinates: -162.90727, 64.82434 (WGS84)
Relative position This occurrence is at about 1,250 feet elevation on the southeast side of Peak 1408. It is 4.2 miles northwest of Mt. Kachauik and probably located within 0.25 mile. This is locality 69 of Gamble (1988).

Site location context

Political divisions (FIPS codes)

Nome(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Solomon D-2(quadrangle 1:63,360 scale)

Solomon NE(quadrangle 1:100,000 scale)

Solomon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Nome(hydrologic unit)

Norton Sound(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Tungsten Critical Primary
Beryllium Critical Secondary

Comments on the commodity information

  • Gangue = Calc-silicates

Materials information

Materials Type of material
Fluorite Gangue

Alteration

  • (Local) Calc-silicate minerals are developed in the impure marble country rocks adjacent to the Kachauik pluton. Oxidation of iron-bearing minerals in the intrusive rocks is indicated by iron-oxide staining.

Mineral occurrence model information

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

Nearby scientific data

(1) -162.90727, 64.82434
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Economic information

Comments on the geologic information

  • Geologic Description = This occurrence is along the north contact of the Kachauik pluton with schistose Ordovician chlorite marble (Till and others, 1986). The plutonic rock at this location is described as a hybrid diorite with abundant biotite (Till and others, 1986). Other parts of the Kachauik pluton to the south are leucocratic, granodiorite to quartz monzonite (Miller and others, 1972). A composite sample of iron-stained intrusive rocks and fluorite-bearing calc-silicate hornfels contained 100 ppm W and 20 ppm Be (Gamble, 1988). The Kachauik pluton is mid-Cretaceous; a K/Ar date for the pluton is 86.1 +/- 3 Ma (Miller and others, 1972).
  • Age = Mid-Cretaceous; a K/Ar date for the Kachauik pluton is 86.1 +/- 3 Ma (Miller and others, 1972).

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Council

Comments on the workings information

  • Workings / Exploration = No workings or exploration acitivities are known but regional stream sediment geochemistry and airborne radiometric surveys may have been completed in the area.

Reference information

Bibliographic references

  • Deposit

    Miller, T.P., Grybeck, D.J., Elliott, R.L., and Hudson, T.L., 1972, Preliminary geologic map of the eastern Solomon and southeastern Bendeleben quadrangles, eastern Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 72-256, 11 p.

  • Deposit

    Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.

  • Deposit

    Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Gamble, 1988

General comments

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

Reporter information

Type Date Name Affiliation Comment
Reporter 19-AUG-99 Travis L. Hudson Applied Geology

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.