Hoggatt Creek Prospect, Juneau Mining District, Juneau, Alaska, USAi

Regional Level Types
Hoggatt Creek Prospect	Prospect
Juneau Mining District	Mining District
Juneau	City Borough
Alaska	State
USA	Country

Location: This prospect is at an elevation of about 500 feet on Hoggatt Creek, a informally-named north tributary to Johnson Creek. It is 1.5 miles northwest of Berners Bay and 1 mile southeast of the Jualin Mine (JU044), in the SW1/4 section 14, T. 35 S., R. 62 E. of the Copper River Meridian. The location is accurate.
Geology: The Hoggatt Creek deposit was probably discovered around 1895 but little work has been done since. Workings include a 22-foot adit, 2 open cuts, and several trenches. The deposit consists of a concordant quartz vein that cuts metavolcanic greenschist and Jualin Diorite. The vein strikes SE and dips 65-75 SW; it has been traced in outcrop for at least 600 feet and ranges from a few inches to 4 feet thick. The vein contains 1% to 7% pyrite. Samples averaged 268 ppm copper and 0.4 ppm gold (Redman and others, 1989). This property is currently (2001) under control of Coeur Alaska. The Hoggatt Creek prospect is in the Jualin Mine area (see JU044). It is in 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 in Early Cretaceous (105 Ma) Jualin Diorite, which intrudes Mesozoic (Upper Triassic) metabasalt. Both extensional and shear veins are present that generally strike north to northwest and dip east. Discrete vein systems are defined by one or more through-going quartz veins, many of which are in shear zones (Miller and others, 1995). Hydrothermal muscovite from veins in the Jualin mine are 53.2 Ma to 55.5 Ma (Miller and others, 1994). This coincides with the 55 Ma age of the other mesothermal gold veins in the Juneau Gold Belt (Goldfarb and others, 1997).
Workings: There is a 22-foot adit, 2 open cuts, and several trenches. This property is currently (2001) under control of Coeur Alaska.
Age: Hydrothermal muscovite from veins in the Jualin mine are 53.2 Ma to 55.5 Ma (Miller and others, 1994). This coincides with the 55 Ma age of the other mesothermal gold veins in the Juneau Gold Belt (Goldfarb and others, 1997).

Commodities (Major) - Au
Development Status: None
Deposit Model: Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)

Other Databases

Link to USGS - Alaska:	JU048

Other Regions, Features and Areas containing this locality

References