John River

Occurrence, Inactive

Commodities and mineralogy

Main commodities Sb
Ore minerals stibnite

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale D-5
Latitude 67.7596
Longitude -152.3832
Nearby scientific data Find additional scientific data near this location
Location and accuracy The original reference for this occurrence only describes its location as being on the John River below the mouth of the Hunt Fork (Joesting, 1942). Based on subsequent descriptions (Berg and Cobb, 1967; Cobb, 1972; Maas, 1987), it may be at an elevation of about 1,500 feet on the east side of John River, about 1.5 miles downstream from the mouth of Hunt Fork. y Kurtak and others (2002) searched he area but they found no sign of this occurrence and there is no other evidence of its location other than the brief Joesting reference. The location of this occurrence is suspect.

Geologic setting

Geologic description

Joesting (1942) listed a stibnite lode, a sample of which assayed 42 percent antimony, on an unnamed tributary to the John River about a mile downstream from the mouth of the Hunt Ford. The rocks in the area consists of Upper Devonian, Hunt Fork Shale in fault contact with Middle or Upper Devonian(?) or older(?), black slate, phyllite. and limestone (Dillon and others, 1986). Kurtak and others (2002) searched the area for this occurrence but found no sign of it. The location of this occurrence is suspect.
Geologic map unit (-152.385980401184, 67.7591464398988)
Mineral deposit model Simple Sb deposit? (Cox and Singer, 1986; model 27d?).
Mineral deposit model number 27d?
Age of mineralization Devonian or younger based on the age of the host rock.
Alteration of deposit Not noted.

Production and reserves

Workings or exploration The only evidence of this occurrence is that it is reported by Joesting (1942).
Indication of production None
Reserve estimates None.
Production notes None.

Additional comments

As best that it can be located, this occurrences is in Gates of the Arctic National Park.

References

References

Reporters J.M. Britton (Anchorage); D.J. Grybeck (Contractor, USGS)
Last report date 2/1/2011