Unnamed (upper Ophir Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Gangue minerals calcite

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale A-4
Latitude 65.058
Longitude -163.692
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is in bedrock exposures along upper Ophir Creek (BN099) about 3.4 miles upstream of its confluence with Crooked Creek. This is at the confluence of upper Ophir Creek and Flat Creek. It is locality 77 of Gamble (1988). As shown by Gamble (1988), it is just upstream of old placer mine workings (BN106).

Geologic setting

Geologic description

Gamble (1988) reports that a calcite vein in marble contains 0.25 ppb gold at this locality. Bedrock exposures are limited in this area; this occurrence may be close to a regional contact between lower Paleozoic mafic metavolcanic and metasedimentary assemblages (Till and others, 1986).
Geologic map unit (-163.694628246178, 65.0572752932365)
Mineral deposit model Calcite vein in marble
Age of mineralization Cretaceous ?; epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily Cretaceous in age.
Alteration of deposit Calcite veining.

Production and reserves

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

References