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Unnamed Occurrence (ARDF - WI036; northwest of Colorado Creek), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - WI036; northwest of Colorado Creek) | - not defined - |
| Koyukuk Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
67° 23' 39'' North , 152° 45' 14'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is located about 0.9 mile northwest of the mouth of Colorado Creek and almost 6 miles east of the east end of Ernie Lake. The occurrence is at an elevation of of about 1,120 meters, about 0.4 mile west-southwest of the center of section 29, T. 30 N., R. 23 W., of the Fairbanks Meridian. The occurrence is the site of sample 169 in Dillon and others (1981 [AOF 133B]). The location is accurate.
Geology: This occurrence consists of cassiterite and fluorite disseminated in pale green to white, fluorite-muscovite, granitic gneiss in the contact zone of a Proterozoic(?) granite gneiss (Dillon and others, 1981 [AOF 133B]; 1986). A sample of cassiterite-bearing gneiss contains 70 ppm tin.
Workings: Only surface sampling.
Commodities (Major) - Sn
Development Status: None
Deposit Model: Porphyry Sn (?) (Cox and Singer, 1986; model 20a)
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Cassiterite Formula: SnO2 |
| ⓘ Fluorite Formula: CaF2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 3 - Halides | |||
|---|---|---|---|
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Cassiterite | SnO2 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Ca | Calcium | |
| Ca | ⓘ Fluorite | CaF2 |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
Other Databases
| Link to USGS - Alaska: | WI036 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Brooks Range DomainVolcanic Arc
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