Rapid River bend Occurrence, Sheenjek Mining District, Yukon-Koyukuk Census Area, Alaska, USA (original) (raw)
Rapid River bend Occurrence, Sheenjek Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Rapid River bend Occurrence | Occurrence |
| Sheenjek Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
Latitude & Longitude (WGS84):
67° 34' 47'' North , 141° 16' 48'' West
Latitude & Longitude (decimal):
Mindat Locality ID:
199599
Long-form identifier:
mindat:1:2:199599:5
6977275b-99bd-4ae6-adf6-8b1e4564e5b2
This area is just south and east of > 38.5 square mi (100 square km) of creek drainages containing variable to abundant cassiterite, monazite, ilmenite and allanite, and variable scheelite, powellite, molybdenite and chromite in sluice samples. Also, see MAS/MILS Sequence # 0020330009 (USBM, 1995)
Location: Location plotted is locality 4 of Barker (1981, p. 25). Anomalous area is approximately 1 mi (1.6 km) N-S x 2 mi (3.2 km) E-W and centered on this ridge. Does not include locations called VABM Orphan, VABM Orphan, or placer localities mentioned in Barker (1981). Located to within 1 mi (1.6 km).
Geology: Rubble of several phases of Old Crow batholith includes 2-mica granite, aplites and granodiorite. Area has hematite and secondary uranium minerals in quartz vein and brecia float, a radon gas anomaly, and associated rock and soil anomalies.
Workings: Sample of quartz vein float contain up to 2.8 ppm Ag, >2000 ppm B, 50 ppm Be, 70 ppm Bi, 280 ppm Cu, 70 ppm Mo, 3300 ppm Pb, 300 ppm Sn, 1600 ppm U and 1500 ppm Zn. Soil samples contain up to 3100 ppm Pb, 3100 ppm Zn and 120 ppm U (Barker, 1981, p.90-95).
Alteration: Muscovite/sericite and tourmaline are common in granodiorite/granite and aplite. Some chloritization of biotite.
Commodities (Major) - Mo, Pb, Sn, U; (Minor) - Ag, B, Be, Bi, Cu, Zn
Development Status: No
Deposit Model: Lode; felsic plutonic-associated Sn, Mo, U, +W and base metals, possible veins,
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This is a list of exploitable or exploited mineral commodities recorded at this locality.
Mineral List
7 valid minerals.
Detailed Mineral List:
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| Link to USGS - Alaska: | CO008 |
|---|
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