Unnamed Occurrence (ARDF - WI043; east of Ernie Lake), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - WI043; east of Ernie Lake) | - not defined - |
| Koyukuk Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
67° 23' 41'' North , 152° 53' 24'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is located about 2.2 miles east-northeast of the east end of Ernie Lake. The occurrence is at an elevation of about 1,240 meters, about 0.1 mile southwest of the center of section 27, T. 30 N., R. 24 W., of the Fairbanks Meridian. The occurrence is the site of sample 172 in Dillon and others (1981 [AOF 133B]). The location is accurate.
Geology: This occurrence consists of fluorite and cassiterite disseminated in border and contact phases of metagranite (Dillon and others, 1981; samples 172 and 455 [AOF 133B]). The contact rocks are light-olive-green, schistose, chlorite-muscovite granite gneiss. The border phase is blastoporphyritic, muscovite-biotite granite orthogneiss. Samples of both phases contain disseminated fluorite and cassiterite. Samples of schistose metagranite contain 20 ppm Sn. No other anomalous metals were found.
Workings: Only surface sampling.
Commodities (Major) - Sn; (Minor) - F
Development Status: None
Deposit Model: Porphyry Sn (?) (Cox and Singer, 1986; model 20a)
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed 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: | WI043 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Brooks Range DomainVolcanic Arc
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
