Unnamed (near Rabbit Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Cu; Pd; Pt
Ore minerals bornite; chalcopyrite; covellite; pyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale NT
Quadrangle map, 1:63,360-scale C-3
Latitude 67.6294
Longitude -163.3992
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence consists of float boulders collected in Rabbit Creek at an elevation of about 600 feet. The occurrence is about 6.2 miles southeast of Igiglogruk Mountain near the northeast corner of Section 28, T. 26 N., R. 21 W., of the Kateel River Meridian. The location is accurate.

Geologic setting

Geologic description

Rounded boulders and cobbles of layered, possibly cumulate, gabbroic to troctolitic mafic rocks, variably altered, contain sulfide minerals and anomalous values of platinum group metals (Mowatt and Jansons, 1985). The sulfides include chalcopyrite, bornite, covellite, pyrite, and pyrrhotite. Five sulfide-bearing samples of altered mafic rocks contained 412 to 1,406 parts per billion (ppb), 343 to 892 ppb palladium, and up to 309 ppb Au and 3,000 parts per million Cu. The bedrock source for these boulders is unknown but presumably is one of the mafic-ultramafic complexes of the western Brooks Range.
Geologic map unit (-163.402086233662, 67.6287282932549)
Mineral deposit model Cu-Ni-PGE in mafic rocks from a mafic-ultramafic complex.
Alteration of deposit Noted but not identified.

Production and reserves

Workings or exploration Limited sampling by government geologists in the early 1980s.
Indication of production None
Reserve estimates None.

Additional comments

This occurrence is now within the Cape Krusenstern National Monument which is closed to mining and mineral exploration.

References