|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||The Josie and Karen prospect is on the southwest shore of Gastineau Channel, on Douglas Island immediately southwest of the Douglas boat harbor. It is in the SE1/4NW1/4 section 36, T. 41 S., R. 67 E. of the Copper River Meridian. The location is accurate.|
The Josie and Karen prospect was discovered in 1886 and has a 175-foot adit with a 22-foot winze. The deposit consists of black phyllite that has been intruded by a hydrothermally altered albite-diorite dike about 70 feet thick (Redman and others, 1989). The dike contains glassy, quartz-calcite stringers and sparsely disseminated chalcopyrite, pyrite and sphalerite. U.S. Bureau of Mines samples contained no significant gold values (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||(-134.391468648076, 58.2722715228391)|
|Alteration of deposit||Dike is hydrothermally altered.|
|Workings or exploration||The Josie and Karen prospect was discovered in 1886 and has a 175-foot adit with a 22-foot winze.|
|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|