|Quadrangle map, 1:250,000-scale||CV|
|Quadrangle map, 1:63,360-scale||D-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This mile-long placer prospect is along the Bremner River just upstream from Threemile Canyon. The map site is at the midpoint of the placer, in SW1/4 sec. 15, T. 10 S., R. 7 E., of the Copper River Meridian. The location of the site is accurate to within 2000 ft. The prospect is shown as #31 in Cobb (1972: MF-392).|
Geologic descriptionThis prospect consists of small amounts of placer gold in alluvium derived from Upper Cretaceous Valdez Group metamorphic rocks (Winkler and Plafker (1981). According to Moffit (1914), high benches of glacial outwash behind a ridge of shale formerly dammed the river and formed a lake, producing a site of gold deposition. The gold is too fine and too sparse to have interested prospectors.
|Geologic map unit||(-144.152036626465, 60.9995245018985)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Holocene.|
|Workings or exploration||Unknown.|
|Indication of production||Undetermined|
Additional commentsLocated on lands within Wrangell-St. Elias National Park.
Cobb, E.H., 1972, Metallic mineral resources map of the Cordova quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-392, 1 sheet, scale 1:250,000.
Moffit, F.H., 1914, Geology of the Hanagita-Bremner region, Alaska: U.S. Geological Survey Bulletin 576, 56 p.
|Reporters||S.W. Nelson, Anchorage, AK|
|Last report date||6/10/2000|