Juneau Occurrence, Hyder District, Prince of Wales-Outer Ketchikan Borough, Alaska, USA
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Geology: The country rocks in the area of the Juneau occurrence are pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group, which are underlain and locally intruded by the Triassic Texas Creek Granodiorite (Smith, 1977; Koch, 1996). Buddington (1929, p. 108-108) describes the deposit as a quartz vein 3-6 feet thick in Texas Creek Granodiorite. The vein, reportedly traced on the surface for 1300 feet, locally contains small shoots of chalcopyrite. A second vein is said to carry galena and pyrite.
Commodities (Major) - Cu, Pb
Development Status: None
Deposit Model: Polymetallic veins
4 entries listed. 4 valid minerals.
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Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p. 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.