Unnamed (Norutak Hills)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Mo; Zn
Other commodities Au
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale HU
Quadrangle map, 1:63,360-scale D-4
Latitude 66.7527
Longitude -154.9062
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 2,525 feet, in a saddle in the Norutak Hills. It is in the SE1/4 of section 26, T. 16 N., R. 18 E. of the Kateel River Meridian. The location is accurate within 1 mile.

Geologic setting

Geologic description

According to Grybeck (1977), this occurrence mainly consists of intensely oxidized, porphyritic granite and pyritized, soda rhyolite that are weakly anomalous in zinc. The oxidized rocks are marked by prominent gossan. Two semi-quantitative spectrographic analyses of altered andesite and soda rhyolite with disseminated pyrite each show 0.007% Cu and 0.001 ounce of gold per ton, but no detectable molybdenum or zinc (Patton and Miller, 1966). The rocks in the area are Jurassic or Cretaceous andesitic volcanic rocks, intruded by small hypabyssal bodies, chiefly latite and quartz-latite porphyry, with subordinate pyritiferous, soda rhyolite (Patton and Miller, 1966).
Geologic map unit (-154.908874718196, 66.7521755189627)
Age of mineralization Intrusive bodies are Cretaceous or younger.
Alteration of deposit Oxidation of pyrite forms prominent gossan.

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

References