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  3. Mineral Resource Data System (MRDS)

Unnamed

Occurrence in Alaska, United States with commodities Zinc, Rubidium, Cerium
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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. Reporter information

Geologic information

Identification information

Deposit ID 10308643
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -153.59797, 63.71452 (WGS84)
Relative position Occurrence is situated on a southerly slope of Sischu Mountains at 2,050 feet (625 m) in Section 33, T. 20 S., R. 27 E., of the Kateel River Meridian. Location is known to within 500 feet (152 m).

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 C-2(quadrangle 1:63,360 scale)

Denali NW(quadrangle 1:100,000 scale)

Medfra(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Zinc Critical Primary
Rubidium Critical Secondary
Cerium Critical Secondary

Materials information

Materials Type of material
Limonite Gangue

Alteration

  • Extensive clay and chalcedonic alteration.

Nearby scientific data

(1) -153.59797, 63.71452
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This occurrence consists of heavily altered, limonitic rhyolite breccia of Sischu Volcanic Field (Miller and others, 1980; Moll and others, 1981; Clautice and others, 1993). Mineral occurrence is inferred to be Late Cretaceous, based on isotopic age of Sischu Volcanics (Moll and others, 1981). Clautice and others (1993) and Miller and others (1980) report anomalous zinc, rubidium and cerium values from the limonitic breccia zones.
  • Age = Mineral occurrence is inferred to be Late Cretaceous, based on isotopic age of Sischu Volcanics (Moll and others, 1981).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = Clautice and others (1993) and Miller and others (1980) report anomalous zinc, rubidium, and cerium values from limonitic breccia zones.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Clautice and others, 1993

Reporter information

Type Date Name Affiliation Comment
Reporter 08-JUN-1998 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.