|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||As located by Maas and others (1991), the Lucky Jim prospect is at an elevation of about 2,900 feet, 0.5 mile south of Granite Mountain and about 0.3 mile south-southeast of the center of section 20, T. 73 S., R. 84 E.|
Geologic descriptionThe rocks in the vicinity of the Lucky Jim prospect are part of a large granodiorite-quartz diorite stock (Sainsbury, 1961; Eberlein and others, 1983; Brew, 1996). Early workers considered the stock to be Mesozoic or Cretaceous; however, recent radiometric dating indicates that it is Devonian (S.M. Karl, oral communication, 2003). Wright and Wright (1908) described the deposit as an auriferous quartz vein that strikes N25W and dips 40NE in granitic rock. The vein also contains pyrite, galena, and secondary copper carbonates. Maas and others (1991) collected two samples that averaged 28.1 parts per million (ppm) silver and 0.96 ppm lead. They also cited an unconfirmed report of a small vein of galena in highly deformed marble. That report contradicts Wright and Wright (1908), who described the prospect as a vein in granitic rock. Maas and others (1995) do not mention marble in their table of deposits in the Hollis area. At the location visited by Maas and others (1991), the workings consisted of a 20-foot shaft and a short adit below the shaft.
|Geologic map unit||(-132.675379260279, 55.5216811532701)|
|Mineral deposit model||Unclear; there are contradictory descriptions of the deposit and its host rocks.|
|Age of mineralization||Unknown, other than that the vein is in Devonian granitic rocks.|
|Workings or exploration||The only workings are a 20-foot shaft and a short adit below the shaft.|
|Indication of production||None|
Additional commentsThis prospect is now in the Karta River Wilderness Area which is closed to exploration and mining.
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.
Bufvers, John, 1967, History of mines and prospects, Ketchikan district, prior to 1952: Alaska Division of Mines and Minerals Special Report 1, 32 p.
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.
Herreid, Gordon, and Rose, A.W., 1966, Geology and geochemistry of the Hollis and Twelvemile Creek area, Prince of Wales Island southeastern Alaska: Alaska Division of Mines and Minerals Geologic Report 17, 32 p.
Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.
Maas, K.M., Still, J.C., and Bittenbender, P.E., 1992, Mineral investigations in the Ketchikan mining district, Alaska, 1991 - Prince of Wales Island and Vicinity: U.S. Bureau of Mines Open-File Report 81-92, 69 p., 1 sheet, scale 1:20.
Maas, K.M., Still, J.C., Clough, A.H., and Oliver, L.K., 1991, Mineral investigations in the Ketchikan mining district, Alaska, 1990: southern Prince of Wales Island and vicinity: U.S. Bureau of Mines Open-File Report 33-91, 139 p., 12 sheets, scale 1:63,360.
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.
|Reporters||D.J. Grybeck (Applied Geology)|
|Last report date||5/1/2004|