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).
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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	ListMap

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