Bear Gulch

Prospect in Alaska, United States with commodities Copper, Molybdenum, Gold, Lead, Zinc
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 10001419
MRDS ID A012164
Record type Site
Current site name Bear Gulch
Alternate or previous names Unnamed

Geographic coordinates

Geographic coordinates: -149.41662, 62.28263 (WGS84)
Relative position Small tributary of Sheep River; 1 1/2 mi (2.4 km) S of Sheep River, 5 mi (8.0 km) SW of Rainbow Lake; location accurate to within 1/4 mi (400 m) radius (MacKevett and Holloway, 1977, loc. 25; Csejtey and Miller, 1978, loc. 88).

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Talkeetna Mountains B-5(quadrangle 1:63,360 scale)

Talkeetna Mountains SW(quadrangle 1:100,000 scale)

Talkeetna Mountains(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Talkeetna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary
Gold Secondary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Molybdenite Ore

Alteration

  • (Local) Alteration in granite

Mineral occurrence model information

Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Nearby scientific data

(1) -149.41662, 62.28263

Economic information

Comments on the geologic information

  • Geologic Description = Host rock is granitic intrusive of Tertiary age. Sulfides disseminated in altered granitic rock near contact with upper Paleozoic metavolcanogenic rocks.
  • Age = Tertiary

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Yentna

Comments on the workings information

  • Workings / Exploration = Type of workings: Surface.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = MacKevett and Holloway, 1977

General comments

Subject category Comment text
Deposit Model Name = Porphyry Cu-Mo (Cox and Singer, 1986; model 21a)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1996 Riehle, J. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.