John Bull Hill

Mine, Active

Commodities and mineralogy

Main commodities Au
Ore minerals gold; pyrite

Geographic location

Quadrangle map, 1:250,000-scale CA
Quadrangle map, 1:63,360-scale D-6
Latitude 65.91
Longitude -161.93
Nearby scientific data Find additional scientific data near this location
Location and accuracy The John Bull Hill hillside placer mine is on the right bank of Candle Creek, just above its confluence with Kiwalik River. The placer extends southwest from Kiwalik River parallel to Candle Creek for about a mile. The map site is in section 24, T. 6 N., R. 16 W., of the Kateel River Meridian.

Geologic setting

Geologic description

The John Bull Hill mine is an area of extensive, hillside placers along the right bank of Candle Creek near the mouth. Data from 53 drill holes showed 15 to 60 feet of ice and muck, 0 to 18 feet of barren gravel, 0 to 25 feet of auriferous gravel, 1 to 29 feet total gravel and 0 to 13 feet of auriferous bedrock. Averages of the drillhole data are: 35.0 feet ice and muck, 4.2 feet barren gravel, 6.7 feet auriferous gravel and 3.1 feet auriferous bedrock. Three of the holes bottomed in limestone bedrock and the others bottomed in decomposed schist (Henshaw, 1909). All ground is frozen. A gold nugget worth $62.10 (Au at $20.67 per ounce) was found. Concentrates contain abundant pyrite, hematite, rutile, occasional garnet, and little magnetite.
Geologic map unit (-161.932695241491, 65.9093249262284)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration The placer has been mined since the early 1900s. Exploration was by drifting and drilling. Mining through the 1950s was mainly by hydraulic methods. All the ground in the area is frozen and requires stripping and thawing prior to mining. Since the 1980s the area has been open-cut mined by front end loaders.
Indication of production Yes; medium
Reserve estimates Arctic Circle Enterprises estimated gold reserves on John Bull Hill to be 8,500 ounces in 1952 (Williams, 1998).

References

MRDS Number A013491

References

Williams, Anita, 1998, A summary report on the mineral resources of Candle Creek and adjacent areas in Candle, Alaska: Unpublished report prepared for Berg and Wetlesen, Gulph Mills, Pennsylvania, 18 p.
Reporters Anita Williams (Anchorage, AK)
Last report date 1/12/2000