Prospect Creek

Mine, Active?

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale BT
Quadrangle map, 1:63,360-scale D-2
Latitude 66.793
Longitude -150.5119
Nearby scientific data Find additional scientific data near this location
Location and accuracy The mouth of Prospect Creek on the Jim River is near the Prospect Creek camp on the Dalton Highway. There has been considerable mining and exploration along the lower 6.5 miles of Prospect Creek. The coordinates are about 6 miles upstream on the creek where there was a substantial mining operation in 2001, near the center of section 14, T. 23 N., R. 13 W., of the Fairbanks Meridian.

Geologic setting

Geologic description

Although gold was discovered on Prospect Creek in 1909 (Maddren, 1913) and there are numerous test pits and tailings along the lower 6 or 7 miles of the creek that may predate World War II, there were few descriptions of the placers until the 1970s (Kurtak and others, 2002). In the 1970s and 1980s there was much claim staking and and prospecting by several parties. The creek was placer mined in 1993 and 1997 and in 2001 there was a substantial placer mine using mechanized equipment and a washing plant about 6.5 miles above the mouth of the creek. There is no public record of production which may have been substantial from 1993 to 2001.
The placers worked from the late 1990s to 2001 were in elevated bedrock benches; the gold was in blue clay, covered by 3 to 20 feet of gravel on greenstone bedrock. The pay zones assayed 0.004 to 0.007 ounce of gold per cubic yard. Nuggets weighted up to 0.7 ounce.
Geologic map unit (-150.514578003924, 66.7925501314635)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Although gold was discovered on Prospect Creek in 1909 (Maddren, 1913) and there are numerous test pits and tailings along the lower 6 or 7 miles of the creek that may predate World War II, there were few descriptions of the placers until the 1970s (Kurtak and others, 2002). In the 1970s and 1980s there was much claim staking and and prospecting by several parties. The creek was placer mined in 1993 and 1997 and in 2001 there was a substantial placer mine using mechanized equipment and a washing plant about 6.5 miles above the mouth of the creek. There is no public record of production which may have been substantial from 1993 to 2001.
Indication of production Yes; small
Production notes There is no public record of production which may have been substantial from 1993 to 2001.

Additional comments

MAS No. 0020390038

References

Reporters J.M. Britton (Anchorage, Alaska); D.J. Grybeck (Contractor, U.S. Geological Survey)
Last report date 4/18/2010