Lupin

Prospect, Active

Commodities and mineralogy

Main commodities Ag; Au
Other commodities As; Bi; Hg; Sb
Ore minerals arsenopyrite; chalcopyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-6
Latitude 63.226
Longitude -149.624
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Lupin prospect is at an elevation of about 2,800 feet, on the northwest bank of Bryn Mawr Creek. The map site is in the NE1/4 of sec. 34, T. 19 S., R. 11 W., of the Fairbanks Meridian. The location is accurate to within 1,000 feet.

Geologic setting

Geologic description

The Lupin prospect is about 3,100 feet northeast of the Golden Zone mine (HE043). The country rocks at the prospect are faulted, Triassic redbed sedimentary rocks. The deposit consists of fault-controlled quartz veins containing arsenopyrite and chalcopyrite. The hostrocks adjacent to the veins are bleached and argillized (unpublished report by Addwest Minerals International Ltd., 1997). Drilling has identified sericitized dikes but their relation to the deposit is not clear. The Lupin deposit closely resembles the deposit at the Bunkhouse prospect (HE039).
Geologic map unit (-149.626291445338, 63.2255266815807)
Mineral deposit model Polymetallic vein or hot-spring Ag-Au (Cox and Singer, 1986; model 22c, 25a)
Mineral deposit model number 22c, 25a
Age of mineralization Late Cretaceous or younger (see HE043).
Alteration of deposit Narrow zones adjacent to the veins are bleached and argillized.

Production and reserves

Workings or exploration Trenching and one drill hole have been completed at the prospect.
Indication of production None

Additional comments

See Bunkhouse (HE039).

References

MRDS Number 10307512
Reporters N. Van Wyck (Stevens Exploration Management Corporation)
Last report date 4/7/2000