|Quadrangle map, 1:250,000-scale||JU|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of approximately 300 feet, on a southwest flowing creek that enters the head of Boat Harbor. It is neawr the middle of the E1/2 section 20, T. 37 S., R. 62 E. of the Copper River Meridian. The location is accurate within 1/4 mile.|
Geologic descriptionThis occurrence consists of several short 4- to 10-inch-thick quartz veins, small quartz-calcite veins, and quartz breccia hosted in argillite. The veins contain disseminated chalcopyrite, malachite, pyrite, and sphalerite. U.S. Bureau of Mines samples contained up to 1.8 ppm gold, 2 ppm silver, 670 ppm copper, 320 ppm lead, and 310 ppm zinc (Clough and Redman, 1989). The general area is underlain by metamorphosed Silurian and Devonian clastic rocks, limestone, and volcanic units; Permian limestone and siltstone; and small plutons of Tertiary and Cretaceous granodiorite (Brew and Ford, 1985).
|Geologic map unit||(-135.206409411826, 58.6469699469575)|
|Alteration of deposit||Oxidation of copper minerals.|
|Workings or exploration||Only surface samples.|
|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.
|Reporters||J.C. Barnett and L.D. Miller (Juneau, Alaska )|
|Last report date||12/15/2001|