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

Unnamed (on north side of Cape Creek valley)

Occurrence in Alaska, United States with commodity Tin
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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. 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 10308386
Record type Site
Current site name Unnamed (on north side of Cape Creek valley)

Geographic coordinates

Geographic coordinates: -167.94443, 65.58225 (WGS84)
Relative position This lode tin occurrence is located at 500 feet elevation on the south flank of the ridge between the headwaters of Cape Creek (TE006) and Goodwin Gulch (TE004). Detrital cassiterite mapping in the headwaters of Cape Creek led to discovery of the mineralized outcrops (Mulligan, 1966, p. 22-23). This location is 3,750 feet upstream from the mouth of the west headwater fork of Cape Creek; it was not identified as a separate location by Cobb and Sainsbury (1972) or Cobb (1975).

Site location context

Political divisions (FIPS codes)

Nome(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Teller C-6(quadrangle 1:63,360 scale)

Teller NE(quadrangle 1:100,000 scale)

Teller(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Imuruk Basin(hydrologic unit)

Norton Sound(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Wales Native Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Tin Critical Primary

Comments on the commodity information

  • Gangue = Unidentified green segregations

Materials information

Materials Type of material
Cassiterite Ore

Alteration

  • (Local) Much clay alteration appears to be developed.

Nearby scientific data

(1) -167.94443, 65.58225
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This area is in Mississppian marble (Sainsbury, 1972) peripheral to the Late Cretaceous Cape Mountain biotite granite stock (Hudson and Arth, 1983). A small granite intrusion, identified over about a 20-foot length in a dozer trench, is apparently altered and associated with some mineralized (?) marble. The dozer trench, 145 feet long, is mostly in blocky, gray, limestone (marble) but clay alteration and 'green segregations in clay' are noted in the field descriptions (Mulligan, 1966, p. 32). Samples from the portion of the trench exposing granite and clay contained 0.01 % tin; the green segregations in clay contained 0.69 % tin (Mulligan, 1966, p. 32).
  • Age = Late Cretaceous; tin metallization in the Cape Mountain area is interpreted to be linked to evolution of the Cape Mountain biotite granite that has been determined to be 78.8 +/- 2.9 my by the K/Ar method (Hudson and Arth, 1983, p. 769).

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Port Clarence

Comments on the workings information

  • Workings / Exploration = A 20-foot zone of granite and clay alteration is exposed within a 145- foot dozer trench. Detrital cassiterite mapping has been completed in the east headwater fork of Cape Creek.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Mulligan, 1966

General comments

Subject category Comment text
Deposit Model Name = Lode; cassiterite in altered granite. Analogy to deposit models not clear ..

Reporter information

Type Date Name Affiliation Comment
Reporter 10-MAY-98 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.