Unnamed (north of Mount Kashagnak)

Occurrence in Alaska, United States with commodities Silver, Gold, Molybdenum

Geologic information

Identification information

Deposit ID 10002202
MRDS ID A013102
Record type Site
Current site name Unnamed (north of Mount Kashagnak)

Geographic coordinates

Geographic coordinates: -135.70211, 59.38975 (WGS84)
Relative position This occurrence is at an elevation of about 2,750 feet about 0.7 miles north of the summit of Mount Kashagnak. It is at the east-central edge of section 6, T. 29 S., R. 58 E. of the Copper River Meridian. It is shown as mineral occurrence 13 by Redman and others (1984) and as number S043 by Wells and others (1986).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Molybdenum Primary

Materials information

Materials Type of material
Molybdenite Ore
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite
    Rock unit name Mt. Kashagnak Pluton
    Rock description Mt. Kashagnak Pluton
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite

Nearby scientific data

(1) -135.70211, 59.38975

Comments on the geologic information

  • Geologic Description = According to Redman and others (1984), a few rare, thin quartz veins 0.04 to 0.16 inches wide can be traced for at least 10 feet. The veins contain small amounts of molybdenum, gold, and silver. One sample of a single vein with attached wallrock contained 137 ppm molybdenum, 2.3 ppm silver, and 0.7 ppm gold. The veins occur within the biotite-quartz-monzonite-porphyry core of the mid-Cretaceous Mount Kashagnak pluton.
  • Age = Mid-Cretaceous or younger based on the age of the Mount Kashagnak pluton (Redman and others, 1984).

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Juneau (Skagway subdistrict)

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013102
USGS Alaska Resource Data File ARDF SK028

Bibliographic references

  • Deposit

    Redman, E.C., Retherford, R.M., and Hickok, B.D., 1984, Geology and geochemistry of the Skagway B-2 Quadrangle, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 84-31, 34 p., 4 sheets, scale 1:40,000.

  • Deposit

    Wells, D.E., Pittman, T.L., Brew, D.A. and Douglass, S.L., 1986, Map and description of the mineral deposits in the Juneau, Taku River, Atlin, and part of the Skagway quadrangles, Alaska; U.S. Geological Survey Open-File Report 85-717, 332 p.

Comments on the references

  • Primary Reference = Redman and others, 1984

General comments

Subject category Comment text
Deposit Model Name = Quartz vein with Mo, Au and Ag (Cox and Singer, 1986; model 22c?),

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-2001 T.C. Crafford T. Crafford & Associates