Unnamed (near Mount Seltat)

Occurrence in Alaska, United States with commodities Silver, Copper, Lead, Tungsten, Zinc, Gold

Geologic information

Identification information

Deposit ID 10308260
Record type Site
Current site name Unnamed (near Mount Seltat)

Geographic coordinates

Geographic coordinates: -136.33215, 59.59974 (WGS84)
Relative position This occurrence is about 0.7 miles east of the summit of Mount Seltat along a ridge that extends eastward from the summit. The location is approximate as the area of mineralization is described as occurring in 'talus piles that drain the north and south sides of the rugged eastern ridge of Mount Seltat.' (Still and others, 1991). It is shown as number 2 on sheet 1 by Still and others (1991).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Copper Primary
Lead Primary
Tungsten Primary
Zinc Primary
Gold Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Magnetite Ore
Pyrrhotite Ore
Sphalerite Ore

Alteration

  • (Local) Skarn.

Mineral occurrence model information

Model code 59
USGS model code 18b
Deposit model name Skarn Cu
Mark3 model number 8
Model code 60
USGS model code 18c
Deposit model name Skarn Zn-Pb
Mark3 model number 22

Nearby scientific data

(1) -136.33215, 59.59974

Comments on the geologic information

  • Geologic Description = Ore minerals are found in talus piles along the north and south sides of a rugged ridge that extends to the east from Mount Seltat. The mineralized talus is probably derived from brown-black manganese-stained bands that crop out between elevations of 4,000 feet and 6,000 feet on the ridge. Gilbert and others (1991) and Still and others (1991) report that float and rubblecrop samples of skarn or massive sulfides contained up to 0.137 ppm gold, 173.1 ppm silver, 4.13% zinc, 8,400 ppm copper, 2.6% lead, and 1,285 ppm tungsten. Cretaceous to Tertiary intrusive rocks mapped to the east by Gilbert and others (1990) suggest a similar age for this mineralization and alteration.
  • Age = Probably Cretaceous or Tertiary based on the age of intrusive rocks mapped to the east by Gilbert and others (1990).

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Probably inactive

Mining district

District name Juneau (Skagway subdistrict)

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF SK078

Bibliographic references

  • Deposit

    Gilbert, W.G., Still, J.C., Burns, L.E., Wier, K.R., and Redman, E.C., 1991, Geochemistry of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-5, 1 sheet, scale 1:63,360, 75 p.

  • Deposit

    Still, J.C., 1991, Bureau of Mines mineral investigations in the Juneau mining district, Alaska, 1984 - 1988, v. 2, Detailed mine, prospect, and mineral occurrence descriptions, section A, Haines-Klukwan-Porcupine subarea: U.S. Bureau of Mines of Mines Special Publication, 214 p.

  • Deposit

    Still, J.C., Hoekzema, R.B., Bundtzen, T.K., Gilbert, W.G., Wier, K.R., Burns, L.E., and Fechner, S.A., 1991, Economic geology of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-4, 156 p., 5 sheets, scale 1:63,360.

  • Deposit

    Gilbert, W.G., Clough, A.H., Burns, L.E., Kline, J.T., Redman, E.C., and Fogels, E.J., 1990, Reconnaissance geology and geochemistry of the northeast Skagway quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 90-5, 2 sheets, scale 1:125,000.

Comments on the references

  • Primary Reference = Still and others, 1991

General comments

Subject category Comment text
Deposit Model Name = Very little information. Probably a skarn (Cox and Singer, 1986; model 18b or 18c).

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-01 T.C. Crafford T. Crafford & Associates