Blackburn

Prospect in Alaska, United States with commodities Copper, Gold

Geologic information

Identification information

Deposit ID 10001059
MRDS ID A011738
Record type Site
Current site name Blackburn
Related records 10209480

Geographic coordinates

Geographic coordinates: -143.79141, 61.61966 (WGS84)
Relative position 1,700 ft southwest of Porcupine Creek, a tributary of the Kuskulana River, at a point 1.5 miles downtream from headwaters. Best location: MacKevett and others,1978, loc. 24. Accurate within radius of 100 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Gold Secondary

Materials information

Materials Type of material
Chalcopyrite Ore

Host and associated rocks

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

Nearby scientific data

(1) -143.79141, 61.61966

Comments on the geologic information

  • Geologic Description = Copper-stained fault zones, containing chalcopyrite, pyrite, and possibly gold, in Triassic Nikolai Greenstone that is cut by diorite apophyses of the Jurassic Chitina Valley pluton.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = Open cuts and adits. Type of workings: surface and underground.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011738
USGS Alaska Resource Data File ARDF MC045

Bibliographic references

  • Deposit

    Moffit, F.H., and Mertie, J.B., Jr., 1923, The Kotsina-Kuskulana district, Alaska: U.S. Geological Survey Bulletin 745, 149 p.

  • Deposit

    MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, scale 1:250,000.

  • Deposit

    MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, scale 1:63,360.

  • Deposit

    MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, 1 sheet, scale 1:63,360.

Comments on the references

  • Primary Reference = Moffit and Mertie, 1923

General comments

Subject category Comment text
Deposit Model Name = Lode: disseminated, vein, shear zone

Reporter information

Type Date Name Affiliation Comment
Reporter 29-AUG-1997 Leonard, K.R. U.S. Geological Survey
Reporter 29-AUG-1997 Elliott, R.L. U.S. Geological Survey
Reporter 29-AUG-1997 Richter, D.H. U.S. Geological Survey