|Quadrangle map, 1:250,000-scale||PM|
|Quadrangle map, 1:63,360-scale||A-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is located just south of a perennial stream outlet on the west shore of Poperechnoi Island (Christie, 1974, color anomaly 69; Wilson and others, 1988, locality 53). It is referred to as PMRGX-4 in Wilson and others (1988). The location is accurate to within 1,200 feet.|
Geologic descriptionThis site represents a spotty color anomaly 1 mile in diameter (Christie, 1974, color anomaly 69), developed around granodiorite that intrudes upper Miocene volcanic and epiclastic rocks (Wilson and others, 1995). Christie's examination was brief, and he examined only the edge of the anomaly. He reported probable propylititc alteration, and collected two silt samples, one of which contained 0.02 ppm gold. Mapping in the mid-1980s by the U.S. Geological Survey elsewhere in this general area revealed a hypabyssal andesite intrusion into mineralized sandstone of the Oligocene to Miocene Belkofski Formation (Wilson and others, 1988). Samples of mineralized rock were anomalous in copper and silver.
|Geologic map unit||(-161.594990542575, 55.0841508889886)|
|Age of mineralization||Miocene or younger.|
|Alteration of deposit||Christie (1974) reported epidote and chlorite, indicating probable propylitic alteration.|
|Workings or exploration||Christie (1974) collected two silt samples, one of which contained 0.02 ppm gold. Rock samples AJm733-734 collected elsewhere in the general area by the U.S. Geological Survey in the mid-1980s (samples 84AJm733-734) were reported to be anomalous in copper and silver (Wilson and others, 1988).|
|Indication of production||None|
Additional commentsThis site is on land selected by the Aleut Corporation.
Angeloni, L.M., Wilson, F.H., and Sutley, S.J., 1985, Map and tables showing preliminary rock geochemical data, Port Moller, Stepovak Bay, and Simonof Island quadrangles, Alaska: U.S. Geological Survey Open-File Report 85-470, 179 p., 1 sheet, scale 1:250,000.
Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (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||1/20/2001|