Red Mountain

Prospect in Alaska, United States with commodity Platinum

Geologic information

Identification information

Deposit ID 10307612
Record type Site
Current site name Red Mountain

Geographic coordinates

Geographic coordinates: -161.77268, 58.92925 (WGS84)
Relative position This prospect represents the deeper, subsurface part of the Red Mountain ultramafic pluton. The surface coordinate location (map site) above this prospect is on the southern end of the pluton above and west of the headwaters of Fox Gulch. It is at an elevation of 1,000 to 1,250 feet and very approximately located.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Platinum Primary

Materials information

Materials Type of material
Platinum Ore
Palladium Ore
Iridium Ore
Osmium Ore
Rhodium Ore
Ruthenium Ore

Mineral occurrence model information

Model code 23
USGS model code 9
Deposit model name Alaskan Cr-Pt (PGE)
Mark3 model number 120

Nearby scientific data

(1) -161.77268, 58.92925

Comments on the geologic information

  • Geologic Description = This prospect represents the deeper, subsurface part of the Red Mountain ultramafic pluton. This large Jurassic pluton is mostly dunite, but the eastern border zone includes bands of peridotite, clinopyroxenite, and hornblende-bearing rocks that are zoned outward from dunite in that order. Gravity and aeromagnetic surveys over the Red Mountain pluton show that it is thicker and more deeply seated in its southern part (Alaska Earth Sciences, 2000). This relationship has led to the interpretation that the ultramafic magma was emplaced through a deep feeder conduit in this area. A conceptual diagram of this prospect infers a sulfide-rich, PGM-bearing cumulate zone along the footwall of the feeder conduit (Alaska Earth Sciences, 2000).
  • Age = Jurassic, the age of the Red Mountain ultramafic pluton. Hoare and Coonrad (1978) report K/Ar ages for two samples of amphibole from the southeast border of the Red Mountain pluton: 176.4 +/- 5.3 Ma and 186.9 +/- 5.6 Ma.

Economic information

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Active

Mining district

District name Goodnews Bay

Comments on the workings information

  • Workings / Exploration = An aeromagnetic survey was flown over the Salmon River (Goodnews) area in 1994, a gravity survey has been completed, and some controlled-source audio magneto-telluric lines have been run over selected parts of the ultramafic complex (Alaska Earth Sciences, 2000).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF HG008

Bibliographic references

Comments on the references

  • Primary Reference = Alaska Earth Sciences, 2000

General comments

Subject category Comment text
Deposit Model Name = Alaskan PGE (Cox and Singer, 1986; model 9)

Reporter information

Type Date Name Affiliation Comment
Reporter 18-MAR-01 Travis L. Hudson Applied Geology