|Quadrangle map, 1:250,000-scale||KC|
|Quadrangle map, 1:63,360-scale||B-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is known only from U.S. Bureau of Mines (1977) claim records. Its approximate location is on eastern Gravina Island at an elevation of about 100 feet, and approximately 0.3 mile north of the upper end of the tidal flat at the head of Blank Inlet. The site is in section 35, T. 75 S., R. 90 E., of the Copper River Meridian. It corresponds to loc. 67 in Elliott and others (1978). The location is probably accurate within about 0.2 mile.|
The country rocks on eastern Gravina Island are Upper Jurassic or Cretaceous marine andesitic or basaltic volcanic rocks interbedded with subordinate flyschlike sedimentary rocks (Berg, 1973; Berg and others, 1988). These strata were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time.According to U.S. Bureau of Mines claim records (1977), this prospect, which appears to be in andesitic or basaltic metavolcanic rocks, was staked for gold. No other information about it has been made public.
|Geologic map unit||(-131.692683706625, 55.3156525310496)|
|Indication of production||None|
Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map I-1807, 27 p., scale 1:250,000.
Elliott, R.L., Berg, H.C., and Karl, S.M., 1978, map and table describing metalliferous and selected non-metalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-73-B, 17 p., 1 sheet, scale 1:250,000.
U.S. Bureau of Mines, 1977, Claim map, Ketchikan quadrangle: U.S. Bureau of Mines Map 120, scale 1:250,000.
|Reporters||H.C. Berg, USGS|
|Last report date||7/2/1999|