|Quadrangle map, 1:250,000-scale||BG|
|Quadrangle map, 1:63,360-scale||B-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at the west end of the ridge between Bagley Ice Field and upper Bering Glacier. The map site is at an elevation of about 4,400 feet in the SW1/4 section 8, T 16 S, R 17 E, of the Copper River Meridian. This is locality 3 of Cobb (1972 [MF 373]; 1979 [OF 79-1246]). The location is probably accurate to within one-half mile.|
Geologic descriptionAt this occurrence, native copper occurs in mafic volcanic rocks, and azurite and malachite occur in quartz veins that cut the volcanic rocks (Brabb and Miller, 1962). The volcanic rocks are part of the Lower Tertiary Orca Group (Hudson and Plafker, 1982).
|Geologic map unit||(-142.457419600746, 60.4957325451675)|
|Mineral deposit model||Native copper in mafic volcanic rocks.|
|Age of mineralization||Tertiary. The mineralization postdates the Early Tertiary age of the host volcanic rocks.|
|Alteration of deposit||Oxidation.|
|Workings or exploration||Reconnaissance surface observations have been completed at this locality (Brabb and Miller, 1962).|
|Indication of production||None|
Additional commentsThis occurrence is very close to the southern boundary of the Wrangell-St. Elias National Park.
Brabb, E.E., and Miller, D.J., 1962, Reconnaissance traverse across the eastern Chugach Mountains, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-341, 1 sheet, scale 1:96,000.
Cobb, E.H., 1972, Metallic mineral resources map of the Bering Glacier quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-373, 1 sheet, scale 1:250,000.
Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bering Glacier, Icy Bay, Middleton Island, and Yakutat quadrangles, Alaska: U.S. Geological Survey Open-File Report 79-1246, 41 p.
Hudson, T.L., and Plafker, George, 1982, Paleogene metamorphism of an accretionary flysch terrane, eastern Gulf of Alaska: Geological Society of America Bulletin, v. 93, p. 1280-1290.
|Reporters||Travis L. Hudson|
|Last report date||12/12/2001|