McCann Creek

Occurrence in Alaska, United States with commodities PGE, Chromium

Geologic information

Identification information

Deposit ID 10002308
MRDS ID A013216
Record type Site
Current site name McCann Creek
Related records 10233604

Geographic coordinates

Geographic coordinates: -161.71269, 58.97925 (WGS84)
Relative position McCann Creek is a small stream that flows north from the northern end of Red Mountain to Smalls River. The Platinum to Goodnews Bay Mining Camp road crosses McCann Creek at its confluence with Smalls River, which is 2 miles northeast of the summit of Red Mountain. The map site is at an elevation of about 200 feet on McCann Creek. This occurrence is included in locality 8 of Cobb (1972 [MF 362]; 1980 [OF 80-909]).
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
PGE Primary
Chromium Tertiary

Comments on the commodity information

  • Ore Material = platinum-group metal (PGM) alloys

Materials information

Materials Type of material
Chromite Ore
Ilmenite Ore
Magnetite Ore

Mineral occurrence model information

Model code 120
USGS model code 39b
BC deposit profile C01. C02
Deposit model name Placer PGE-Au

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Stratigraphic age (youngest) Holocene

Nearby scientific data

(1) -161.71269, 58.97925

Comments on the geologic information

  • Geologic Description = Platinum-group metals have been identified in this creek but no workable paystreak has been found. PGM-rich material contains 95.5 percent Pt, 2.8 percent Ir, 1.2 percent Rh, and 0.5 percent Pd (Mertie, 1976). The creek flows across Paleozoic or Mesozoic sedimentary and igneous rocks that are intruded by the Jurassic Red Mountain ultramafic pluton (Hoare and Coonrad, 1978). Dunite of this pluton is within a few hundred feet of the upstream limit of the creek.
  • Age = Quaternary.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Active?

Mining district

District name Goodnews Bay

Comments on the reserve resource information

  • Reserves = Fechner (1988, p. 28) estimates that there are 500,000 cubic yards of material grading 0.0030 ounce of PGM per cubic yard in McCann Creek.

Comments on the workings information

  • Workings / Exploration = Some exploration drill holes have probably been drilled along this creek; no mining has been reported.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013216
USGS Alaska Resource Data File ARDF HG030

Bibliographic references

  • Deposit

    Mertie, J.B., Jr., 1976, Platinum deposits in the Goodnews Bay district, Alaska: U.S. Geological Survey Professional Paper 938, 42 p.

  • Deposit

    Cobb, E.H., 1977, Placer deposit map of central Alaska: U.S. Geological Survey Open-File Report 77-168B, 64 p., 1 map, scale 1:1,000,000.

  • Deposit

    Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.

Comments on the references

  • Primary Reference = Mertie, 1976

General comments

Subject category Comment text
Deposit Model Name = Placer PGE-Au (Cox and Singer, 1986; model 39b)

Reporter information

Type Date Name Affiliation Comment
Reporter 18-MAR-2001 Travis L. Hudson Applied Geology