|Quadrangle map, 1:250,000-scale||PM|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is at an elevation of about 500 feet on southeastern Unga Island approximately 1 mile southeast of Apollo Mountain. The location is accurate to within 1,200 feet.|
Geologic descriptionThe California prospect consists of a system of multiple, 2-inch-wide, open-growth quartz veinlets in bleached, partly argillized felsic tuff containing disseminated iron oxide pseudomorphs of pyrite (Wilson and others, 1988). The hostrocks are part of the Eocene to Oligocene Popof volcanic rocks (Wilson and others, 1995). Battle Mountain Exploration Company (Ellis and Apel, 1990) traced the vein system southwest to the Heather Creek prospect (PM085). A rock sample collected at the California adit contained 2.19 ppm gold. Other samples collected between the California and Heather Creek prospects contained as much as 0.41 ppm gold, 100 ppm or more arsenic, and 1 ppm or more mercury.
|Geologic map unit||(-160.595054489171, 55.1791670429381)|
|Mineral deposit model||Epithermal gold veins|
|Age of mineralization||Eocene or younger.|
|Alteration of deposit||Alteration types are silicification and argillization.|
|Workings or exploration||Old workings include a caved north-trending adit and a small dump. In 1983 UNC Teton Exploration Drilling Company mapped the prospect, conducted VLF-EM surveys, collected geochemical samples, and drilled four holes for a total of 2,575 feet (Wilson and others, 1988). In 1990 Battle Mountain Exploration examined and sampled the prospect. One sample collected at the adit contained 2.19 ppm gold.|
|Indication of production||None|
Ellis, W.T., and Apel, R.A., 1990, Unga/Alaska Peninsula 1990 final report: Battle Mountain Exploration Company report, 49 p., 29 map sheets at various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)
Wilson, F.H., Detterman, R.L., Miller, J. W., and Case, J.E., 1995, Geologic map of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-2272, 1 sheet, scale 1:250,000.
|Last report date||1/29/2001|