Unnamed (divide between upper Partin and Shotgun creeks)

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu
Other commodities Sb
Ore minerals arsenopyrite; chalcopyrite; pyrite; pyrrhotite; stibnite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-6
Latitude 63.071
Longitude -149.952
Nearby scientific data Find additional scientific data near this location
Location and accuracy 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).

Geologic setting

Geologic description

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.
Geologic map unit (-149.954284222014, 63.0705167185332)
Mineral deposit model Cu skarn (Cox and Singer, 1986; model 18b)
Mineral deposit model number 18b
Age of mineralization Late Cretaceous or younger.
Alteration of deposit High temperature skarn.

Production and reserves

Workings or exploration 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.
Indication of production None

References

MRDS Number A011330

References

Reporters N. Van Wyck (Stevens Exploration Management Corporation)
Last report date 4/7/2000