|Quadrangle map, 1:250,000-scale||JU|
|Quadrangle map, 1:63,360-scale||B-2|
|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.|
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.|
|Workings or exploration||The Tyee prospect was discovered in 1914 and was subsequently consolidated with the Holeman Prospect (JU192).|
|Indication of production||None|
Brew, D.A., and Ford, A.B., 1985, Preliminary reconnaissance geologic map of the Juneau, Taku River, Atlin, and part of the Skagway 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 85-395, 23 p., 2 sheets, scale 1:250,000.
Redman, E.C., Maas, K.M., Kurtak, J.M., and Miller, L.D., 1991, Section D: Juneau Gold Belt subarea, in U.S. Bureau of Mines, Mineral investigations in the Juneau Mining District, Alaska, 1984-1988: Volume 2 - Detailed mine, prospect, and mineral occurrence descriptions: U.S. Bureau of Mines Special Publication VOL. 2D, 424 p., 19 sheets.
|Reporters||J.C. Barnett and L.D. Miller (Juneau, Alaska )|
|Last report date||12/15/2001|