Tyee

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale B-2
Latitude 58.2736
Longitude -134.4005
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of approximately 400 feet, on Douglas Island, 1/4 mile west of Douglas. It is in the SE1/4NE1/4 section 35, T. 41 S., R. 67 E. of the Copper River Meridian. The location is accurate.

Geologic setting

Geologic description

The Tyee prospect was discovered in 1914 and was subsequently consolidated with the Holeman Prospect (JU192). There are no known workings. The deposit consists of black phyllite that has been intruded by a swarm of diorite sills (Redman and others, 1989). The sills are weakly altered and contain minor disseminated pyrite. Pyrite-bearing quartz veins occur along the margins. No other information is available (Redman and others, 1989; Wells and others, 1986).
The rocks in the general area are Upper Jurassic or Cretaceous marine argillite and graywacke, interbedded with andesite or basalt (Brew and Ford, 1985). The bedded rocks are regionally metamorphosed to prehnite-pumpellyite or greenschist grade, and cut by diorite or gabbro dikes and sills.
Geologic map unit (-134.402269325934, 58.2732715119028)
Alteration of deposit The diorite is weakly altered.

Production and reserves

Workings or exploration The Tyee prospect was discovered in 1914 and was subsequently consolidated with the Holeman Prospect (JU192).
Indication of production None

References