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  3. Mineral Resource Data System (MRDS)

Erickson

Past Producer in Alaska, United States with commodities Copper, Silver
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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. Mineral occurrence model information
  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 10001028
MRDS ID A011702
Record type Site
Current site name Erickson
Alternate or previous names Erickson and Madden
Related records 10258140

Geographic coordinates

Geographic coordinates: -142.25246, 61.40579 (WGS84)
Relative position Near head of Glacier Creek. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet.

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

McCarthy B-4(quadrangle 1:63,360 scale)

McCarthy SE(quadrangle 1:100,000 scale)

McCarthy C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chitina River(hydrologic unit)

Copper River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Wrangell-St. Elias National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Silver Secondary

Comments on the commodity information

  • Ore Material = Copper (native)

Materials information

Materials Type of material
Chalcocite Ore
Cuprite Ore
Malachite Ore
Tenorite Ore
Copper Ore

Mineral occurrence model information

Model code 87
USGS model code 23
Deposit model name Basaltic Cu (BC name is Volcanic redbed Cu)
Mark3 model number 118

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Nikolai Greenstone
    Rock description Nikolai Greenstone
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -142.25246, 61.40579
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Native Cu, tenorite, cuprite, and minor amounts of other Cu minerals in irregular masses, thin veins, and disseminated grains in upper parts of amygdaloidal lava flows and, to a lesser extent, as fillings in amygdules or associated with quartz-epidote veins in Triassic Nikolai Greenstone. Deposit may be restricted to one 6 to 8 ft lava bed containing numerous amygdules. Most of copper fine-grained; copper masses to 27 kg have been recorded.
  • Age = Cretaceous

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Nizina

Comments on the production information

  • Production Notes = Minor production in 1917.

Comments on the workings information

  • Workings / Exploration = Explored by about 100 m of underground workings in two tunnels and 3 levels. One sample assayed 70 ppm Ag, four samples ranged between 7 to 30 ppm Ag (MacKevett and Smith, 1968). Underground workings.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Miller, 1946

General comments

Subject category Comment text
Deposit Model Name = Basaltic Cu

Reporter information

Type Date Name Affiliation Comment
Reporter 09-MAR-94 Leonard, K.R. U.S. Geological Survey
Reporter 09-MAR-94 Elliott, R.L. U.S. Geological Survey
Reporter 09-MAR-94 Nokleberg, W.J. U.S. Geological Survey
Reporter 09-MAR-94 Richter, D.H. U.S. Geological Survey

Beyond USGS

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

External references

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.