Unnamed (lower Boyden Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale NB
Quadrangle map, 1:63,360-scale B-5
Latitude 62.4847
Longitude -143.0726
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on lower Boyden Creek. It is at an elevation of about 3,600 feet. 6,500 feet northwest of peak 5650. The occurrence is about 0.2 mile south of the center of section 7, T. 8 N., R. 13 E. of the Copper River Meridian. This is locality M1 of Lowe and others (1982), locality 9 of Richter and others (1975), and National Park Service locality WRST-9 (unpublished data). Cobb and Richter (1980) included this locality as an 'Unnamed occurrence'. It is located to within a few hundred feet.

Geologic setting

Geologic description

A quartz vein that contains pyrite and chalcopyrite is localized in a shear zone that cuts volcaniclastic rocks (Lowe and others, 1982). The shear zone is associated with a northwest-trending fault that cuts volcanic rocks of the upper Paleozoic Tetelna Volcanics. The fault cuts Tertiary basalt about 700 feet to the southeast of this occurrence (Lowe and others, 1982).
Geologic map unit (-143.074740474512, 62.4843296854304)
Mineral deposit model Polymetallic vein (Cox and Singer, 1986; model 22c)
Mineral deposit model number 22c
Age of mineralization Tertiary? The fault at this locality cuts Tertiary basalt about 700 feet to the southeast (Lowe and others, 1982).

Production and reserves

Indication of production None

Additional comments

The occurrence is in the Wrangell-St. Elias National Preserve.