Unnamed (west of central Osborn Creek)

Prospect in Alaska, United States with commodities Gold, Copper

Geologic information

Identification information

Deposit ID 10002008
MRDS ID A012853
Record type Site
Current site name Unnamed (west of central Osborn Creek)

Geographic coordinates

Geographic coordinates: -165.11744, 64.58485 (WGS84)
Relative position This unnamed lode prospect is at an elevation of about 550 feet on the east flank of hill 1043, a few thousand feet north of central Osborn Creek (NM305). The map location is at the north edge of section 32, T. 10 S., R. 32 W., Kateel River Meridian. It is approximately located, probably to within one-half mile. It is locality 54 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Primary

Materials information

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

Alteration

  • (Local) Oxidation of chalcopyrite to secondary copper minerals.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
  • Host or associated Host
    Rock type Metamorphic Rock > Schist > Mica Schist

Nearby scientific data

(1) -165.11744, 64.58485

Comments on the geologic information

  • Geologic Description = This deposit consists of a quartz vein containing iron and copper sulfides, inferred to be pyrite and chalcopyrite. The vein is near a contact between schist and greenstone and is reported to have assayed from 0.2 to 2 ounces of gold per ton (Smith, 1908). Copper sulfide oxidation products, inferred to be malachite and azurite, are also present. Bedrock in this area is marble, schist, and local greestone (Hummel, 1962 [MF 247]). The prospect is within about one-half mile of the head of mining activity on Osborn Creek (NM305).
  • Age = Mid-Cretaceous or younger; vein cross cuts schist metamorphosed in the mid-Cretaceous.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Nome

Comments on the workings information

  • Workings / Exploration = Prospect pits are probably present.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012853
USGS Alaska Resource Data File ARDF NM278

Bibliographic references

  • Deposit

    Smith, P.S., 1908, Investigations of mineral deposits of Seward Peninsula: U.S. Geological Survey Bulletin 345, p. 206-250.

  • Deposit

    Hummel, C.L., 1962, Preliminary geologic map of the Nome C-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-247, 1 sheet, scale 1:63,360.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.

Comments on the references

  • Primary Reference = Smith, 1908

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a).

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUL-00 Hawley, C.C. Hawley Resource Group
Reporter 10-JUL-00 Travis L. Hudson Hawley Resource Group