Unnamed Occurrence (ARDF - JU101; south of Nun Mt.), Haines, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - JU101; south of Nun Mt.)	- not defined -
Haines	City Borough
Alaska	State
USA	Country

Location: This occurrence is 1/2 mile south of Nun Mountain and 4 miles northwest of Mount Golub at an elevation of approximately 2,000 feet. It is near the northeast corner of section 13, T. 39 S., R. 61 E. of the Copper River Meridian. The location shown is accurate within 1/2 mile.
Geology: The general area is underlain by deformed and metamorphosed Silurian or Devonian carbonate, clastic and volcanic clastic rocks that have been intruded by Upper Jurassic and Lower Cretaceous granitic and dioritic rocks (Brew and others, 1992). This occurrence is one of several widely scattered skarn deposits in the area between Nun Mountain and just south of Mount Golub, where a Cretaceous granodiorite pluton intrudes a thick limestone unit (Clough and Redman, 1989). Numerous small garnet-epidote skarns occur along the contact between the granodiorite and the limestone. Wells and others (1986) describe pyrite veinlets in limestone and silicified argillite near a granodiorite contact at this locality. The U.S. Bureau of Mines noted several small, discontinuous garnet-epidote skarns up to a foot thick and several feet long, that contain sparse chalcopyrite and pyrite (Clough and Redman, 1989).
Workings: Surface samples only.

Commodities (Major) - Cu
Development Status: None
Deposit Model: Cu skarn deposit (Cox and Singer, 1986; model 18b)

Other Databases

Link to USGS - Alaska:	JU101

Other Regions, Features and Areas containing this locality

References