Unnamed (in headwaters of upper Niukluk River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Pb
Ore minerals duftite

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale A-4
Latitude 65.18
Longitude -163.87
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the ridge crest between two unnamed, east headwater tributaries to the Niukluk River, near elevation 2,247 feet.

Geologic setting

Geologic description

This is a possible duftite occurrence along the trend of an apparently conformable pyrrhotite-bearing schist layer that is better expressed about one half mile to the ENE (Briskey, 1983). This locality, and several others in this part of the Bendeleben A-4 quadrangle, are in high grade metamorphic rocks that are structurally above or peripheral to the crosscutting Pargon pluton. The Pargon pluton is mostly granodiorite and assumed to be Cretaceous in age (Till and others, 1986). It was emplaced at shallower depths than the more deep-seated Bendeleben pluton to the east. The metamorphic rocks peripheral to the western Pargon pluton are also intruded by small, felsic dikes and plugs including quartz porphyry and muscovite granite.
Geologic map unit (-163.872641681442, 65.1792748576421)
Mineral deposit model Duftite? in metamorphic rocks.
Age of mineralization Cretaceous ?
Alteration of deposit Oxidation?

Production and reserves

Workings or exploration No workings are known at this locality.
Indication of production None

References

MRDS Number A012769

References

Reporters Travis L. Hudson (Applied Geology)
Last report date 3/15/1999