Unnamed (northeast of upper Partin Creek)

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 63.066
Longitude -149.959
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 5,000 feet, on the northeast wall of the valley of upper Partin Creek. The map site is in the SW1/4 of sec. 25, T. 21 S., R. 13 W., of the Fairbanks Meridian. The location is known to within 0.25 mile. This is location 23 of Cobb (1978: OFR 78-1062).

Geologic setting

Geologic description

The country rocks in the area of this prospect are Upper Triassic limestone and basalt cut by Upper Cretaceous or Lower Tertiary biotite-quartz diorite porphyry. The deposit consists of auriferous skarn containing pyrite, pyrrhotite, chalcopyrite, arsenopyrite, and stibnite. Gold grades are higher near the intrusive contact. Samples contain up to 0.2 ounces of gold per ton and 0.7 percent copper (Hawley and Clark, 1974).
Geologic map unit (-149.961283628109, 63.0655163910461)
Mineral deposit model Cu skarn (Cox and Singer, 1986; model 18b)
Mineral deposit model number 18b
Age of mineralization Probably Late Cretaceous or younger.
Alteration of deposit Formation of skarn at intrusive contacts.

Production and reserves

Workings or exploration There has been limited exploration consisting of shallow trenches and rock chip samples.
Indication of production None

References

MRDS Number A011330

References

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