Unnamed (at east end of Gold Harbor)

Occurrences, Probably inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu; Mo
Ore minerals chalcopyrite; molybdenite; pyrite; tennantite

Geographic location

Quadrangle map, 1:250,000-scale DE
Quadrangle map, 1:63,360-scale D-4
Latitude 54.9253
Longitude -133.0153
Nearby scientific data Find additional scientific data near this location
Location and accuracy These occurrences are at the head of Gold Harbor where the Bureau of Mines took numerous samples along about a mile of shoreline (Maas and others, 1991). The coordinates are approximately at the center of the sample area, in the NW1/4 section 23, T. 80 S., R. 82 E. The location is accurate.

Geologic setting

Geologic description

A small Cretaceous granitic pluton intrudes pre-Ordovician marble at the head of Gold Harbor. Mass and others (1991) extensively sampled four contact zones of the granite. Two of the contact zones have sulfides. Samples from one zone that contained tennantite assayed up to 4.39 ounces of silver per ton and 0.142 part per million (ppm) gold. The other mineralized zone is hornfels that contains pyrite, molybdenite, and chalcopyrite across a width of 10 to 15 feet. Samples of this zone contained up 431 ppm molybdenum and 0.4 percent copper.
Geologic map unit (-133.016959700301, 54.9249517187942)
Mineral deposit model Sulfides in contact zone of granite.
Age of mineralization Related to the contact zone of Cretaceous granite.
Alteration of deposit Contact metamorphism of marble adjacent to Cretaceous granite.

Production and reserves

Workings or exploration None; no indication of work beyond sampling along the shoreline by government geologists.
Indication of production None

References