Unnamed (east of Berg Mountain)

Occurrence, Inactive

Commodities and mineralogy

Other commodities Y
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale D-6
Latitude 58.9569
Longitude -135.7007
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is approximately one mile east of Berg Mountain at an elevation of about 4,100 feet. It is in the NW1/4 section 2, T. 34 S., R. 58 E. of the Copper River Meridian. This is location J012 of Wells and others (1986). The location is accurate within 1/2 mile.

Geologic setting

Geologic description

The rocks in the area are predominantly Silurian and Devonian greenstones and other metavolcanic rocks (Brew and Ford, 1985). Cobb (1978, [OFR 78-374]) reports disseminated pyrite in iron-stained siliceous rocks that contain traces of yttrium. An aeromagnetic anomaly occurs nearby (Wells and others, 1986).
The area consists of 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).
Geologic map unit (-135.702565075348, 58.9565419696626)
Alteration of deposit Local iron staining.

Production and reserves

Indication of production None


MRDS Number A012108


Reporters J.C. Barnett and L.D. Miller (Juneau, Alaska )
Last report date 12/15/2001