Unnamed Occurrence (ARDF - NB030; north of upper Antler Creek), Chisana Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - NB030; north of upper Antler Creek)	- not defined -
Chisana Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

The occurrence is in the Wrangell-St. Elias National Preserve.
Location: This occurrence is on the nose of a small, east-trending ridge near the center of section 5, T. 7 N., R. 17 E. of the Copper River Meridian. It is at an elevation of about 5,700 feet, 4,800 feet southeast of peak 7144. This is locality 37 of Richter and others (1975). It is located to within a few hundred feet.
Geology: This occurrence consists of segregations of pyrite and chalcopyrite in the hornblendite, border zone of the Antler Creek pluton (Richter and others, 1975). The Antler Creek pluton is part of a mid-Cretaceous intrusive suite associated with copper skarn and porphyry deposits elsewhere in the Nabesna quadrangle (e.g., NB022 and NB043). A K/Ar date on hornblendite in the border zone of the Antler Creek pluton is 105 +/- 2.8 Ma (Richter, 1975; Richter, Lanphere, and Matson, 1975).
Workings: Probably only surface examination.
Age: Related to Mid-Cretaceous pluton A K/Ar date on hornblendite in the border zone of the Antler Creek pluton is 105 +/- 2.8 Ma (Richter, 1975; Richter, Lanphere, and Matson, 1975).

Commodities (Major) - Cu
Development Status: None
Deposit Model: Chalcopyrite segregations in hornblendite

Other Databases

Link to USGS - Alaska:	NB030

Other Regions, Features and Areas containing this locality

References