Unnamed (near Lake Marge)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Mo
Ore minerals chalcopyrite; molybdenite
Gangue minerals epidote; garnet

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale A-2
Latitude 55.21585
Longitude -132.52579
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is near the southwest shore of Lake Marge. It is about 0.6 mile southeast of the center of section 1, T. 77 S., R. 85 E.

Geologic setting

Geologic description

This occurrence is near the contact between albite-epidote hornfels and a tongue of Cretaceous granodiorite (Herreid and others, 1978). The area is cut by several faults that offset the contact. Under the name 'Lake Marge mineralized zone' in a list of mineral deposits, Herreid and others (1978) describe disseminated molybdenite and chalcopyrite in epidote-garnet skarn at this site. There is no indication of prospecting or exploration. Herreid and Trible (1973) also note molybdenum minerals in skarn about 0.8 mile to the west along the same contact.
Geologic map unit (-132.527457371277, 55.2154953880686)
Mineral deposit model Molybdenum-copper skarn (Cox and Singer, 1986; model 18b).
Mineral deposit model number 18b
Age of mineralization Probably Cretaceous.
Alteration of deposit Molybdenite and chalcopyrite disseminated in skarn that is probably related to a nearby Cretaceous granodiorite intrusion.

Production and reserves

Workings or exploration Apparently none beyond surface examination by government geologists.
Indication of production None