Bluebird Occurrence, Hyder District, Prince of Wales-Outer Ketchikan Borough, Alaska, USA
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Geology: The country rock in the area of this occurrence is the Triassic Texas Creek Granodiorite, which underlies and locally intrudes pelitic metasedimentary and subordinate andesitic (greenstone) metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group (Smith, 1977; Koch, 1996). The deposit (Byers and Sainsbury, 1956, p. 139-140) consists of a quartz vein in granodiorite about 1500 feet from its contact with rocks of the Hazelton Group. The vein is 4 inches thick and exposed for only a few feet; it contains sparsely disseminated pyrite, chalcopyrite, galena and scheelite in the central part and molybdenite along the walls. Hand specimens contain an estimated 0.5% WO3.
Workings: Hand specimens of the scheelite-bearing vein contain an estimated 0.5% WO3
Commodities (Major) - W; (Minor) - Cu, Mo, Pb
Development Status: None
Deposit Model: Polymetallic veins
6 entries listed. 6 valid minerals.
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Byers, F.M., Jr., and Sainsbury, C.L., 1956, Tungsten deposits of the Hyder district, Alaska: U.S. Geological Survey Bulletin 1024-F, p. 123-140. Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360. Koch, R.D., 1996 [In press), Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report, 1 sheet, scale 1:250,000. Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p., 1 plate.