|Quadrangle map, 1:250,000-scale||VA|
|Quadrangle map, 1:63,360-scale||C-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is near Rainbow Creek on the north side of Elliott Creek valley (Moffit and Mertie, 1923, locality 21, plate 3); it is at an elevation of about 4,100 feet in the SW1/4 section 35, T. 2 S., R. 7 E., of the Copper River Meridian. This prospect is approximately located, perhaps to within one-half mile. It is included in locality 65 Cobb and Matson (1972) and locality 55 of Winkler and others (1981 [OFR 80-892-B]).|
Geologic descriptionA shear zone in Triassic Nikolai Greenstone contains a 4-foot-thick, 8-foot-long, tabular, fault-bounded body with bornite, chalcopyrite, and pyrite (Mendenhall and Schrader, 1903; Moffit and Mertie, 1923). Bornite and chalcopyrite also occur in sheeted calcite veins and associated with quartz and calcite in fracture zones. The lenticular mineralization at the Goodyear prospect may be a faulted segment of the sulfide-bearing body at the Henry Prather prospect (VA032). The Goodyear prospect was explored by a 300-foot-long adit and at least one open cut by 1923 (Moffit and Mertie, 1923). The Nikolai Greenstone and overlying Chitistone Limestone are deformed into a large, asymmetric anticline with its axis approximately parallel to Elliott Creek. The copper mineralization is believed to be related to the regional mineralizing event that produced the rich Kennecott copper deposits in the McCarthy quadrangle (MacKevett and others, 1997).
|Geologic map unit||(-144.102194839456, 61.6466328467727)|
|Mineral deposit model||Veins, disseminations, and fracture fillings in greenstone; probably related to Kennecott-type copper deposits (MacKevett and others, 1997)|
|Age of mineralization||The copper mineralization is believed to be related to the mineralizing event that produced the rich Kennecott copper deposits in the McCarthy quadrangle to the east (MacKevett and others, 1997). This event is interpreted to have accompanied Late Jurassic or Early Cretaceous deformation and metamorphism (MacKevett and others, 1997, p. 88).|
|Workings or exploration||The Goodyear prospect was explored by a 300-foot-long adit and at least one open cut by 1923 (Moffit and Mertie, 1923).|
|Indication of production||None|
Additional commentsThis prospect is within the Wrangell-St. Elias National Park.
Cobb, E.H., and Matson, N.A., Jr., 1972, Metallic mineral resources map of the Valdez quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-438, 1 sheet, scale 1:250,000.
MacKevett, E.M., Jr., Cox, D.P., Potter, R.W., III, and Silberman, M.L., 1997, Kennecott-type deposits in the Wrangell Mountains, Alaska--High-grade copper ores near a basalt-limestone contact, in Goldfarb, R.J., and Miller, L.D., eds., Mineral deposits of Alaska: Economic Geology Monograph 9, p. 66-89.
Mendenhall, W.C., and Schrader, F.C., 1903, The mineral resources of the Mount Wrangell District, Alaska: U.S. Geological Survey Professional Paper 15, 71 p., 1 sheet.
Moffit, F.H., and Maddren, A.G., 1908, The mineral resources of the Kotsina and Chitina valleys, Copper River region: U.S. Geological Survey Bulletin 345-C, p. 127-175.
Moffit, F.H., and Maddren, A.G., 1909, Mineral resources of the Kotsina-Chitina region, Alaska: U.S. Geological Survey Bulletin 374, 103 p.
Moffit, F.H., and Mertie, J.B., Jr., 1923, The Kotsina-Kuskulana district, Alaska: U.S. Geological Survey Bulletin 745, 149 p.
|Reporters||Travis L. Hudson|
|Last report date||12/14/2001|