|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 placer prospect is at the mouth of Lawson Creek on Douglas Island, 1/2 mile northwest of Douglas. It is near the center of section 26, T. 41 S., R. 67 E. of the Copper River Meridian. The location is accurate.|
Geologic descriptionSeveral placer claims at this site were active from 1881 to 1981 (Wells and others, 1986). The Lawson Creek area is underlain by black phyllite and diorite (Redman and others, 1989). The U.S. Bureau of Mines collected a pan-concentrate sample here that contained 1.7 ppm gold (Redman and others, 1989). The country 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||(-134.412670195818, 58.2847719559747)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Several placer claims at this site were active from 1881 to 1981 (Wells and others, 1986).|
|Indication of production||Undetermined|
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|