Unnamed (near Kutuk River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Ore minerals malachite

Geographic location

Quadrangle map, 1:250,000-scale SP
Quadrangle map, 1:63,360-scale D-2
Latitude 67.758
Longitude -153.811
Nearby scientific data Find additional scientific data near this location
Location and accuracy This site is at an elevation of about 2700 feet on the west side of the Kutuk River near its head. It is in the N1/2 of sec. 12, T. 27 N., R. 22 E., of the Kateel River Meridian. It corresponds to locality 5 of Grybeck and Nelson, 1981. Location accurate to within 600 ft.

Geologic setting

Geologic description

This occurrence consists of a grab sample of copper-stained, orange-weathering dark-gray stretched-pebble conglomerate collected from an otherwise monotonous and regionally extensive sequence of Devonian phyllite (Nelson and Grybeck, 1980; Grybeck and Nelson, 1981). The sample contained 5 ppm Ag and 1500 ppm Cu. No sulfides were noted in the sample, and the occurrence appeared to be only of local extent.
Geologic map unit (-153.813827867032, 67.757524588532)
Age of mineralization Devonian or younger based on age of host rock.

Production and reserves

Workings or exploration Grab sample collected during regional geologic mapping by the USGS in the late 1970s.
Indication of production None

Additional comments

The area is within the Gates of the Arctic National Park and Wilderness and has been closed to prospecting since 1981.

References