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Unnamed Occurrence (ARDF - EA037; on Slate Creek), Southeast Fairbanks Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - EA037; on Slate Creek) | - not defined - |
| Southeast Fairbanks Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
64° 40' 42'' North , 142° 42' 54'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: Slate Creek is a 35-mile-long tributary of the North Fork of the Fortymile River. This occurrence is located in upper Slate Creek, just above the mouth of Ben Creek, in section 3, T. 3 S., R. 25 E., of the Fairbanks Meridian. The location is accurate within 1 mile. Slate Creek is locality 40 of Cobb (1972 [MF-393]).
Geology: The rocks in upper Slate Creek are granitic rocks of probable Mesozoic age and Paleozoic schist, quartzite, and marble (Foster, 1976). Biotite from the nearby Ruby Creek granite give a 40Ar/39Ar plateau age of 102.1 +/- 0.4 Ma (Newberry and others, 1996). In 1949, Wedow and others (1954) found monazite and allanite in panned concentrates from upper Slate Creek, just above the mouth of Ben Creek, during a reconnaissance for radioactive deposits. The source of the monazite and allanite presumably is granitic rocks in the drainage. Wedow and others (1954) also found monazite and allanite in concentrate samples from Ruby Creek (EA039) and Ben Creek (EA036).
Workings: In 1949, Wedow and others (1954) found monazite and allanite in panned concentrates from upper Slate Creek, just above the mouth of Ben Creek (see EA036), during a reconnaissance for radioactive deposits.
Age: Probable Mesozoic source for monazite and allanite.
Commodities (Major) - REE, Th
Development Status: None
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
Detailed Mineral List:
| ⓘ 'Allanite Group' Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| ⓘ 'Monazite Group' Formula: REE(PO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Unclassified | |||
|---|---|---|---|
| ⓘ | 'Monazite Group' | - | REE(PO4) |
| ⓘ | 'Allanite Group' | - | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | ⓘ Monazite Group | REE(PO4) |
| O | ⓘ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | ⓘ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| P | Phosphorus | |
| P | ⓘ Monazite Group | REE(PO4) |
Other Databases
| Link to USGS - Alaska: | EA037 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Yukon-TananaVolcanic Arc
- Yukon-Tanana upper DomainDomain
USA
- Alaska
- Fortymile Mining DistrictMining District
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