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Deimos

Prospect in Alaska, United States with commodities Copper, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10307335
Record type Site
Current site name Deimos

Geographic coordinates

Geographic coordinates: -149.23334, 67.71972 (WGS84)
Relative position The Deimos prospect is at an elevation of about 4,300 feet just west of the upper reaches of Sheep Creek (SE1/4 sec. 36, T. 34 N., R. 8 W. and SW1/4 sec. 31, T. 34 N., R. 7 W., of the Fairbanks Meridian) approximately 6 miles north-northwest of the confluence of Sheep Creek and Robert Creek. The location is accurate within a 1-mile radius.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chandalar C-5(quadrangle 1:63,360 scale)

Chandalar N(quadrangle 1:100,000 scale)

Chandalar(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

Doyon, Limited(ANCSA Region)

ANCSA Region NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Silver Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Magnetite Ore
Pyrite Ore
Epidote Gangue
Garnet Gangue

Alteration

  • (Local) Calc-silicate.

Mineral occurrence model information

Model code 59
USGS model code 18b
Deposit model name Skarn Cu
Mark3 model number 8

Nearby scientific data

(1) -149.23334, 67.71972
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Deimos prospect is one of a number of skarn deposits in the Chandalar area which have been described in general by Newberry and others (1986). These skarns are all northwest of a belt of Devonian(?) granitic rocks informally named the Horace Mountain plutons. Many exhibit both prograde and retrograde mineral assemblages. Newberry and others (1986) stated that their mineralogy, mineralization, and alteration place them in the category of continental-margin, porphyry-related copper skarns. Published information about the geology of individual skarns is scarce, but brief descriptions of the prospect by Newberry and others (1986) indicated that the Deimos prospect is a Cu-Ag skarn. Based on a hand specimen description (Newberry and others, 1986), the skarn contains garnet, epidote, chalcopyrite, and pyrite. Analysis of the hand specimen returned a value of 1.9 percent Cu. In a listing posted on the Ventures Resource Corporation (currently exploring Doyon lands in the area under an agreement with Doyon, Limited) website (URL http://www.venturesresource.com/), the Deimos prospect is classified as a Cu-Au prospect, although there are no data supporting the presence of appreciable gold.
  • Age = Devonian based on reported Early Devonian Pb/Pb zircon ages from the associated Baby Creek batholith and Horace Mountain plutons (Dillon and others, 1996).

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Not determined

Mining district

District name Koyukuk

Comments on the workings information

  • Workings / Exploration = Surface sampling.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Newberry and others, 1986

General comments

Subject category Comment text
Deposit Model Name = Cu skarn deposits (Cox and Singer, 1986; 18b)
Deposit Other Comments = See also: Io (CH102), Ginger (CH060), Hurricane-Diane (CH062), Venus (CH065), Pilgrim (CH099), Mike (CH100), Vicki (CH097), Cindy (CH098), and Evelyn Lee (CH059).

Reporter information

Type Date Name Affiliation Comment
Reporter 17-NOV-99 J.M. Britton U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.