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

Unnamed [on Pete Dahl (Copper Sands) Island]

Occurrence in Alaska, United States with commodities Gold, Chromium, Iron, Manganese, Nickel, Titanium, Vanadium, Zirconium
Map
XML
JSON
KML
C
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Mineral occurrence model information
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10000367
MRDS ID A010434
Record type Site
Current site name Unnamed [on Pete Dahl (Copper Sands) Island]

Geographic coordinates

Geographic coordinates: -145.54247, 60.3496 (WGS84)
Relative position This site is located on a barrier island in the Copper River delta. Older maps refer to this island as Pete Dahl Island (Reimnitz and Plafker, 1976); current maps name this island Copper Sands. The map site is in the SW1/4 sec. 35, T. 17 S., R. 2 W., of the Copper River Meridian. Accuracy of the location is within 1 mile.

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cordova B-5 SE(quadrangle 1:24,000 scale)

Cordova SW(quadrangle 1:100,000 scale)

Cordova C(quadrangle 1:250,000 scale)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Chromium Critical Secondary
Iron Secondary
Manganese Critical Secondary
Nickel Critical Secondary
Titanium Critical Secondary
Vanadium Critical Secondary
Zirconium Critical Secondary

Comments on the commodity information

  • Gangue = Beach sand
  • Ore Material = Native gold

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

(1) -145.54247, 60.3496
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This occurrence consists of widespread beach and flood plain black sand deposits containing heavy minerals. Input of sands is from the Copper River where the supply of material is high. Reimnitz and Plafker (1976) report that the sands extend offshore to depths up to 50 m. They also report that the beaches of the Copper River delta contain as much gold and other heavy minerals as beaches that have been mined elsewhere along this coast. One analysis from a 5-cm-thick surface layer from the west end of the island contained 0.25 ppm Au (Reimnitz and Plafker, 1976).
  • Age = Recent beach sands.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Copper River

Comments on the workings information

  • Workings / Exploration = One analysis from a 5-cm-thick surface layer from the west end of the island contained 0.25 ppm Au (Reimnitz and Plafker, 1976).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Reimnitz and Plafker, 1976

General comments

Subject category Comment text
Deposit Model Name = Placer gold (Cox and Singer, 1986; model 39a)
Deposit Other Comments = Islands in the Copper River delta change shape considerably due to storms and sedimentation supply. The islands are in the Chugach National Forest.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-2000 S.W. Nelson U.S. Geological Survey

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.