Matthews and Blackburn

Prospect in Alaska, United States with commodities Gold, Copper

Geologic information

Identification information

Deposit ID 10001648
MRDS ID A012422
Record type Site
Current site name Matthews and Blackburn

Geographic coordinates

Geographic coordinates: -154.72294, 63.20948 (WGS84)
Relative position The Mathews and Blackburn prospect is located at an elevation of 1,200 feet (366 m), one mile (1.6 km) east of Hidden Creek in Section 29, T. 26 S., R. 22 E., of the Kateel River Meridian. Location is imprecise and based on description by Martin (1922) and Brown (1926).
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Geographic areas

Country State
United States Alaska


Commodity Importance
Gold Primary
Copper Primary

Comments on the commodity information

  • Gangue = Carbonate
  • Ore Material = free gold

Materials information

Materials Type of material
Malachite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite

Nearby scientific data

(1) -154.72294, 63.20948

Comments on the geologic information

  • Geologic Description = In 1920, a lode prospect was staked over a pyroxenite dike in limestone, which was uncovered in upper Hidden Creek (see MD066). According to Brown (1926), gold and copper carbonates are present. The Matthews and Blackburn vein lies within the pyroxenite dike, which is composed predominately of augite. The dike intrudes the Ordovician Telsitna Limestone formation (Dutro and Patton, 1982).

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = Surface prospecting was conducted prior to 1925 (Martin, 1922; Brown, 1926).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012422
USGS Alaska Resource Data File ARDF MD065

Bibliographic references

  • Deposit

    Martin, G.C., 1922, Gold lodes in the Upper Kuskokwim region: U.S. Geological Survey Bulletin 864D, p. 149-161.

  • Deposit

    Brown, J.S., 1926, The Nixon Fork country: U.S. Geological Survey Bulletin 783. p. 97-144.

  • Deposit

    Dutro, T.T. Jr., and Patton,W.W. Jr., 1982, New Paleozoic Formations in the northern Kuskokwim Mountains, west-central Alaska: U.S. Geological Survey Bulletin 1529-H, p. H13-H22.

Comments on the references

  • Primary Reference = Martin, 1922

General comments

Subject category Comment text
Deposit Other Comments = See Hidden Creek placer (MD066). The Matthews and Blackburn prospect is on land conveyed to Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave., Fairbanks, Alaska, 99701.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-JUN-98 Bundtzen, T.K. Pacific Rim Geological Consulting