Pirate Creek

Prospect, Active

Commodities and mineralogy

Main commodities Ag; Au
Other commodities Sb
Ore minerals arsenopyrite; stibnite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-6
Latitude 63.24
Longitude -149.62
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Pirate Creek prospect is on the south bank of the West Fork Chulitna River, about a mile upstream from the junction of Bryn Mawr Creek. The map site is at the west edge of sec. 26, T. 19 S., R. 11 W., of the Fairbanks Meridian. The location is accurate to within half a mile. Also see Additional comments.

Geologic setting

Geologic description

The country rocks at the Pirate Creek prospect are Permo-Triassic argillite and graywacke. The deposit consists of quartz veins containing arsenopyrite and stibnite. The veins contain up to 0.03 ounce of gold per ton as determined from trench samples. The veins are subparallel, and adjacent to a northeast-trending splay of the Zigzag Creek fault, suggesting a genetic relationship (unpublished report by Addwest Minerals International Ltd., 1997). The Pirate Creek deposit contains stibnite, which distinguishes it from other deposits in the area.
Geologic map unit (-149.622292147712, 63.2395271143894)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c)
Mineral deposit model number 22c
Age of mineralization Probably Late Cretaceous (70 - 65 Ma) or younger (HE043).

Production and reserves

Workings or exploration Surface workings only.
Indication of production None

Additional comments

The Pirate Creek claims group may overlap with either, or both, the Flaurier (HE036) and Jumbo (HE034) prospects.


MRDS Number 10307511
Reporters N. Van Wyck (Stevens Exploration Management Corporation)
Last report date 4/7/2000