Unnamed (near Ipnavik River)

Occurrences, Probably inactive

Commodities and mineralogy

Main commodities Pb; Zn
Ore minerals galena; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale HW
Quadrangle map, 1:63,360-scale B-3
Latitude 68.3571
Longitude -157.27177
Nearby scientific data Find additional scientific data near this location
Location and accuracy These occurrences are in a saddle about 3.3 miles south of the mouth of Friendly Creek on the Ipnavik River. They are near the center of section 9, T. 34 N., R. 7E. The location is accurate.

Geologic setting

Geologic description

The rocks in the area consist of undivided, Upper Devonian to Lower Mississippian, Kanayut Conglomerate and Noatak Sandstone, and mafic igneous rocks. Kurtak and others (1995) describe scattered occurrences of disseminated sphalerite with minor galena and pyrite, along a west-northwest, 1000-meter-long trend through a saddle. The sulfides are in a gossanous silicified sandstone that locally contains boxworks structures with sphalerite. Samples contained up to 3.4 percent zinc and 1,920 parts per million lead.
Geologic map unit (-157.274709174039, 68.3565823885472)
Mineral deposit model Sandstone lead-zinc deposit?
Age of mineralization Late Devonian to Early Mississippian or younger based on the age of the host rocks.

Production and reserves

Workings or exploration Only limited sampling by U.S. Bureau of Mines.
Indication of production None
Reserve estimates None.
Production notes None.

Additional comments

MAS number 0020200010.