Unnamed Prospect (ARDF - HE063; divide between upper Partin and Shotgun creeks), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi

Regional Level Types
Unnamed Prospect (ARDF - HE063; divide between upper Partin and Shotgun creeks)	- not defined -
Valdez Creek Mining District	Mining District
Matanuska-Susitna Borough	Borough
Alaska	State
USA	Country

Location: This prospect is at an elevation of 6,000 feet on the divide between upper Partin and upper Shotgun creeks. It is in the north-central part of sec. 25, T. 21 S., R. 13 W., of the Fairbanks Meridian. The location of this prospect is known to within 0.25 miles. This is location 24 of Cobb (1978: OFR 78-1062). It is identified by Hawley and others (1978), and incorporated with locality E-34 of Balen (1990: OFR 34-90).
Geology: The country rocks in the area of the prospect consists of several hundred meters of Upper Triassic limestone and marble, interbedded with altered, amygdaloidal basalt. The strata are intruded by biotite-quartz diorite porphyry of Late Cretaceous to Early Tertiary age. The deposit consists predominantly of skarn bodies, up to 440 feet long and 3 to 20 feet thick, in an area about 3,000 feet long and 1,000 feet wide. The skarn contains pyrrhotite, up to 5% chalcopyrite, and as much as 2 ounces of gold per ton. Arsenopyrite and stibnite occur both in the skarn and in quartz-arsenopyrite-stibnite veins. Samples from shallow trenches contain up to 0.7% copper, 0.7% antimony, 300 ppm silver, and 63 ppm gold.
Workings: There has been surface exploration only. The skarn contains pyrrhotite, up to 5% chalcopyrite, and as much as 2 ounces of gold per ton. Arsenopyrite and stibnite occur both in the skarn and in quartz-arsenopyrite-stibnite veins. Samples from shallow trenches contain up to 0.7% copper, 0.7% antimony, 300 ppm silver, and 63 ppm gold.
Age: Late Cretaceous or younger.
Alteration: High temperature skarn.

Commodities (Major) - Ag, Au, Cu; (Minor) - Sb
Development Status: None
Deposit Model: Cu skarn (Cox and Singer, 1986; model 18b)

Other Databases

Link to USGS - Alaska:	HE063

Other Regions, Features and Areas containing this locality

References