|Quadrangle map, 1:250,000-scale||CR|
|Quadrangle map, 1:63,360-scale||C-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The only published location of the Clipper and Cutter prospects is on a small-scale map in Wright and Wright (1908). For this record, they are presumed to be 0.2 mile northeast of Granite Mountain and about 0.4 mile north-northeast of the center of section 20, T. 73 S., R. 84 E. The location of the Bendingo prospect is even more speculative; for lack of better information, it is grouped with the Clipper and Cutter prospects.|
The deposit on the Cutter claim is a quartz vein with gold and sulfides (Wright and Wright, 1908). The sulfides are unspecified but the vein reportedly is similar to veins at the Flagstaff Mine (CR043) that contain chalcopyrite, galena, and pyrite. The quartz vein on the Clipper claim is 8 to 18 inches wide in an altered and decomposed diabase dike in granite (Wright and Wright, 1908). The Clipper vein was explored with surface stripping and short test adits. The deposit on the Bendingo claim is a quartz vein in granite; it contains free gold and sulfides, and is similar to the veins at the Flagstaff Mine.The rocks in the vicinity of these prospects are part of a large granodiorite-quartz diorite stock (Sainsbury, 1961; Eberlein and others, 1983; Brew, 1996). Early workers considered it to be Mesozoic or Cretaceous, but recent radiometric dating indicates that it is Devonian (S.M. Karl, oral communication, 2003).
|Geologic map unit||(-132.6753797194, 55.5300503660778)|
|Mineral deposit model||Gold-quartz vein (Cox and Singer, 1986; model 36a).|
|Mineral deposit model number||36a|
|Age of mineralization||Unknown, other than that the veins are in Devonian granitic rocks.|
|Workings or exploration||Various combinations of surface stripping and short adits.|
|Indication of production||None|
Additional commentsThese prospect are now in the Karta River Wilderness Area which is closed to exploration and mining.
|MRDS Number||A010034; A010078; A010121|
Brew, D.A., 1996, Geologic map of the Craig, Dixon Entrance, and parts of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2319, 53 p., 1 sheet, scale 1:250,000.
Cobb, E. H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Craig quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-869, 262 p.
Eberlein, G.D., Churkin, Michael, Jr., Carter, Claire, Berg, H.C., and Ovenshine, A. T., 1983, Geology of the Craig quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-91, 52 p.
Sainsbury, C.L., 1961, Geology of part of the Craig C-2 quadrangle and adjoining area, Prince of Wales Island, southeastern Alaska: U.S. Geological Survey Bulletin 1058-H, p. H299-H362.
Wright, F.E., and Wright, C.W., 1906, Lode mining in southeastern Alaska, in Brooks, A.H., 1906, Report on Progress of Investigations of Mineral Resources of Alaska in 1905: U.S. Geological Survey Bulletin 284, p. 30-54.
|Reporters||D.J. Grybeck (Applied Geology)|
|Last report date||5/1/2004|