Johnson Creek

Prospect, Active

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale D-4
Latitude 58.824
Longitude -135.0038
Nearby scientific data Find additional scientific data near this location
Location and accuracy This placer prospect is at the mouth of Johnson Creek on the northwest side of Berners Bay. about 1.5 miles southeast and downstream of the Jualin Mine (JU044). It is in the NW1/4 section 24, T. 35 S., R. 62 E. of the Copper River Meridian. The location is accurate. This is location J110 of Wells and others (1986).

Geologic setting

Geologic description

This placer prospect is downstream from the Jualin Mine (JU044), which produced nearly 38,000 ounces of gold between 1896 and 1928. Historical records indicate that 80% of the gold recovered at the Jualin Mine was free-milling. A shaft was was sunk into the gravels of lower Johnson Creek in the early 1900s. Gold can be panned from the present stream channel but there are no records of past production (Redman and others, 1989).
The Johnson Creek placer is in the Jualin Mine (JU044) area, currently (2001) controlled by Coeur Alaska. It is within the Berners Bay district at the north end of the Juneau Gold Belt. The district is characterized by a series of structurally-controlled, mesothermal, gold-bearing quartz veins. Most of the veins are hosted by the Early Cretaceous (105 Ma) Jualin Diorite, which intrudes Mesozoic (Upper Triassic) metabasalt (Miller and others, 1995).
Geologic map unit (-135.005606948944, 58.8236748091712)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration A shaft was was sunk into the gravels of lower Johnson Creek in the early 1900s.
Indication of production Undetermined

References