Unnamed Occurrence (ARDF - ID128; north of Beaver Creek), Iditarod Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
Regional Level Types | |
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Unnamed Occurrence (ARDF - ID128; north of Beaver Creek) | - not defined - |
Iditarod Mining District | Mining District |
Yukon-Koyukuk Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
62° 26' 6'' North , 157° 20' 9'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
200885
Long-form identifier:
mindat:1:2:200885:4
GUID (UUID V4):
4aeb1ca9-a802-48ed-a9ae-4742bf6767c2
Location: This occurrence is on a north-trending ridge about 3 kilometers north of Beaver Creek, a tributary of the George River. The occurrence is at an elevation of about 1,400 feet, about 0.2 mile south-southwest of hill 1445 and near the northwest corner of section 18, T. 27 N., R. 43 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence is an extensive pyrolusite-bearing bed or layer in sandstone, shale and volcaniclastic conglomerate of the Upper Cretaceous, Kuskokwim Group (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). The blue-gray zone of semi-massive pyrolusite is about 3 feet thick and can be traced for about 1,000 feet along strike. Grab samples of the sandstone with pyrolusite contained more than 0.5 percent manganese, 240 parts per billion (ppb) mercury, and 10.0 parts per million (ppm) molybdenum (McGimsey and others, 1988).
Workings: Samples were collected by the U.S. Geological Survey and the Alaska Division of Geological and Geophysical Surveys in 1984 (McGimsey and others, 1988).
Age: Late Cretaceous?
Commodities (Major) - Mn; (Minor) - Hg, Mo
Development Status: None
Deposit Model: Probably sedimentary Mn (Cox and Singer, 1986; model 34b).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Detailed Mineral List:
ⓘ Pyrolusite Formula: Mn4+O2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
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ⓘ | Pyrolusite | 4.DB.05 | Mn4+O2 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Pyrolusite | Mn4+O2 |
Mn | Manganese | |
Mn | ⓘ Pyrolusite | Mn4+O2 |
Other Databases
Link to USGS - Alaska: | ID128 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Farewell buried DomainDomain
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