|Quadrangle map, 1:250,000-scale||JU|
|Quadrangle map, 1:63,360-scale||A-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at Bishop Point on Stephens Passage. It is in the NW1/4 section 28, T. 42 S., R. 69 E. of the Copper River Meridian. The location is accurate.|
The rocks in the general area are Lower Permian to Upper Triassic, volcanic rocks and subordinate clastic and carbonate strata, and their their metamorphosed equivalents (Gehrels and Berg, 1994).This occurrence is in black phyllite, mafic felsic rocks, and metamorphosed pillow basalt (Redman and others, 1989). The phyllite contains concordant quartz veins up to 3 feet thick that contain 1 to 5 percent pyrite cubes and sparse chalcopyrite. Stratiform pyrite bands up to 2 inches thick locally occur in the metamorphosed pillow basalt. U.S. Bureau of Mines samples of the metabasalt, metafelsic rocks, and phyllite contain up to 0.1 ppm gold, 2.2 ppm silver, 0.27 percent copper and 590 ppm zinc (Redman and others, 1989).
|Geologic map unit||(-134.149555223004, 58.202472070234)|
|Workings or exploration||Surface samples only.|
|Indication of production||None|
Gehrels, G.E., and Berg, H.C., 1994, Geology of southeastern Alaska, in Plafker, George, and Berg, H. C., eds., The geology of Alaska: Geological Society of America, DNAG, The geology of North America, Vol. G-1, p. 451-467.
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|