Quadrangle map, 1:250,000-scale | CH |
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Quadrangle map, 1:63,360-scale | C-6 |
Latitude | 67.6246 |
Longitude | -149.9863 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is at an elevation of about 4,300 feet, on a ridge south of the Hammond River, approximately 6.5 miles west-northwest of Sukakpak Mountain and 5.5 miles north of Jennie Creek Lake. It is about 0.3 mile southwest of the center of section 3, T. 32 N., R. 11 W. The location is accurate within one mile. |
Geologic descriptionThis occurrence was originally described as copper sulfides and malachite-azurite staining in Middle to Upper Devonian(?) conglomerate interbedded in black slate, phyllite, and chloritic siltstone of the Beaucoup Formation (Dillon and Reifenstuhl, 1995). Kurtak and other (2002) describe a quartz vein 1 to 4 inches thick, with trace chalcopyrite and galena, that crosscuts quartz-muscovite schist. Two samples contained up to 356 parts per million (ppm) antimony, 140 ppm arsenic, and 580 ppm zinc, but they were not analyzed for copper and lead. | |
Geologic map unit | (-149.989061054065, 67.6241829591779) |
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Mineral deposit model | Quartz vein with chalcopyrite and galena. |
Age of mineralization | Late Devonian or younger based on the age of the host rock. |
Alteration of deposit | Not noted. |
Workings or exploration | Only limited sampling by government agencies. |
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Indication of production | None |
Reserve estimates | None. |
Production notes | None. |
Additional commentsThis occurrence is in the Gates of the Arctic National Park which is closed to prospecting and mining. MAS No. 0020310094 |
MRDS Number | A012154 |
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ReferencesKurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska, 2 vols.: Bureau of Land Management, Alaska Technical Report 50, 845 p.
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Reporters | J.M. Britton (Anchorage, Alaska); D.J. Grybeck (Contractor, U.S. Geological Survey) |
Last report date | 4/18/2010 |