Middle fork of Broxson Gulch

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Pb
Ore minerals galena; gold

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale B-5
Latitude 63.3292
Longitude -146.1289
Nearby scientific data Find additional scientific data near this location
Location and accuracy This placer deposit is near the mouth of the locally named middle fork of the stream that flows in Broxson Gulch (see figure 2 of Rose, 1965). The location is for the approximate midpoint of the mine, at an elevation of about 3,550 feet in the N1/2 section 25, T. 18 S., R. 8 E., Fairbanks Meridian.

Geologic setting

Geologic description

The lower middle fork of the stream that flows in Broxson Gulch probably flows across complexly intermixed and faulted peridotite and gabbro of the Upper Triassic ultramafic-mafic intrusive complexes and metasedimentary and metavolcanic rocks of the Slana Spur Formation of Late Paleozoic age (Rose, 1965, figure 2; Nokleberg and others, 1991).
The placer deposit was test mined in 1996 and 1997; gold and abundant gray nuggets were recovered. The gray nuggets, originally supposed to be platinum metals, are galena (W.T. Ellis, unpublished data, 1997). The source of the placer gold is uncertain.
Geologic map unit (-146.131164875376, 63.328779580471)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Holocene.

Production and reserves

Workings or exploration Small-scale placer mining occurred in 1996-1997. The area is on active MAN Resources claims.
Indication of production Yes; small
Production notes Small-scale placer mining occurred in 1996-1997, with 'fairly good results' (W.T. Ellis, unpublished data, 1997).