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Juneau Occurrence, Hyder District, Prince of Wales-Outer Ketchikan Borough, Alaska, USA

Latitude: 56°1'30"N
Longitude: 130°12'50"W
Location: The Juneau occurrence is in Section 26 at an elevation of about 3800 feet on a west-facing mountainside above Ferguson Glacier (Elliott and Koch, 1981, p. 13, loc. 40). The location is probably accurate within about a quarter of a mile.
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

References

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.

Mineral List

Chalcopyrite
Galena
Pyrite
Quartz


4 entries listed. 4 valid minerals.

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Current server date and time: October 30, 2014 13:46:50 Page generated: July 14, 2011 17:01:52
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Updated Mineral Entry: KupritFrom Uwe Kolitsch, 30th Oct 2014 13:44:19