1. Mineral Resources
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  3. Mineral Resource Data System (MRDS)

Unnamed (near Raft Creek)

Occurrence in Alaska, United States with commodity Copper
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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. Host and associated rocks
  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 10000723
MRDS ID A011362
Record type Site
Current site name Unnamed (near Raft Creek)

Geographic coordinates

Geographic coordinates: -147.27275, 63.06963 (WGS84)
Relative position This occurrence is at an elevation of about 3,900 feet, on of the first northwest tributary to Raft Creek. The map site is about 1.2 mile north of the Denali Highway, near the center of sec. 25, T. 21 S., R. 2 E., of the Fairbanks Meridian. This location is shown in Smith (1981).

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Healy A-1(quadrangle 1:63,360 scale)

Mount Hayes SW(quadrangle 1:100,000 scale)

Healy(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Susitna 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

Materials information

Materials Type of material
Chalcopyrite Ore
Malachite Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Local oxidation and copper minerals.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -147.27275, 63.06963
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks in the area of the occurrence are mostly the Nikolai Greenstone, a thick sequence of Middle or upper Triassic basalt and subordinate tuff, argillite, and chert (Nokleberg and others, 1992). At the occurence, a small diorite pluton intrudes the Nikolai Greenstone. The deposit consists of chalcopyrite, pyrite, and malachite erratically distributed in quartz veins 1/4 to 3 inches wide. The veins occur along a shear zone several feet wide that cuts the diorite pluton.
  • Age = Middle Triassic or younger.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Smith, 1981

General comments

Subject category Comment text
Deposit Model Name = Quartz vein in shear zone.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-2000 D.L. Stevens Stevens Exploration Management Corporation

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.