Unnamed (in upper Granite Creek)

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

Geologic information

Identification information

Deposit ID 10003526
MRDS ID A106284
Record type Site
Current site name Unnamed (in upper Granite Creek)
Alternate or previous names Unnamed

Geographic coordinates

Geographic coordinates: -147.9627, 62.32959 (WGS84)
Relative position For 2 mi (3.2 km) along upper Granite Creek; location accurate to within 1/2 mi (800 m).
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary
Zinc Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Clay Gangue

Alteration

  • (Local) Clay in gouge of shear zone; iron oxide (gossan)

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46
Model code 78
USGS model code 20c
Deposit model name Porphyry Cu-Au
Mark3 model number 34

Nearby scientific data

(1) -147.9627, 62.32959

Comments on the geologic information

  • Geologic Description = Analyses of mineralized samples from gossans and clay-rich shear zones in tuffs and flows of the Lower Jurassic Talkeetna Formation.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = Analyses of rock samples from south valley wall of upper Granite Creek yielded 0.2 ppm Au, 0.8 ppm Ag, >1.0% Zn, >1.0% Cu (Clautice and others, 1990).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106284
USGS Alaska Resource Data File ARDF TK099

Bibliographic references

  • Deposit

    Clautice, K.H., Harris, E.E., Liss, S.A., Kline, J.T., Bundtzen, T.K., Gilbert, W.G., and Nye, C.J., 1990, Analytical results for rock, pan concentrate, and stream sediment samples from the Talkeetna Mountains B-2 quadrangle and the northern part of the Talkeetna Mountains A-2 quadrangle: Alaska Division of Geological and Geophysical Surveys, Public Data File 90-31, 23 p., 1 pl., scale 1:63,360.

Comments on the references

  • Primary Reference = Clautice and others, 1990

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein or porphyry Cu-Au? (Cox and Singer, 1986; model 22c or 20c?)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1996 Riehle, J. U.S. Geological Survey