Main commodities | Cu; Pb; Zn |
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Ore minerals | chalcopyrite; galena; malachite; sphalerite |
Gangue minerals | quartz |
Quadrangle map, 1:250,000-scale | TB |
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Quadrangle map, 1:63,360-scale | B-2 |
Latitude | 68.38 |
Longitude | -142.037 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | Location plotted is locality 510 of Barker (1981, pl. A-3), on nose of spur ridge of Bear Mountain on west side of Galena Creek; known to within 500 ft (152.4 m). |
Geologic descriptionSphalerite and galena in widely scattered veins and replacements in hornfelsed and weakly propylitized siltstone, with subordinate greenstone and phyllite; sulfides present in 760 m by 1060 m area along ridge west of Galena Creek; more Zn than Pb in samples; Ag negligible; sulfides rare in phyllite, and malachite-staining common in greenstone. Older reports report presence of chalcopyrite in area. Geologic setting is structural dome containing Precambrian-Devonian siltstone, phyllite and greenstone which overly quartzite (possibly Neurokpuk Fm.) and are overlain by thick Devonian conglomerate (Kanayut and/or Kekiktuk Fm.) and Mississippian shale (Kayak Shale). Rocks intruded by Early Tertiary rhyolitic dikes; mineralization confined to greenstone-phyllite-siltstone unit; pyrite and Fe-oxides common along margins of rhyolite dikes (Barker, 1981, p. 33-40, 106-37). | |
Geologic map unit | (-142.039721949813, 68.3797676589059) |
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Mineral deposit model | Polymetallic vein (Cox and Singer, 1986; model 22c). |
Mineral deposit model number | 22c |
Alteration of deposit | Weak propylitization. |
Workings or exploration | High-grade sample 510 contains 24 ppm Cu, 13,000 ppm Pb, 35,000 ppm Zn, 2.7 ppm Ag, 10 ppm Mo; nearby samples 506-8 have up to 1000 ppm Cu, 2600 ppm Pb, 2600 ppm Zn, 0.6 ppm Ag, and 12 ppm Mo (Barker, 1981, p. 140). |
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Indication of production | None |
MRDS Number | A012546 |
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References | |
Reporters | K.R. Leonard; D.F. Huber; J.M. Schmidt ; J.H. Dover |
Last report date | 9/20/1996 |