Unnamed Occurrence (ARDF - WI041; south of Mt. Hecht), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - WI041; south of Mt. Hecht) | - 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° 27' 11'' North , 152° 51' 3'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is about a mile south of Mt. Hecht. It is at an elevation of about 1,200 meters, 0.1 mile southwest of the center of section 2, T. 30 N., R. 24 W., of the Fairbanks Meridian. The occurrence is the site of sample 289 of Dillon and others (1981 [AOF 133B]). The location is accurate.
Geology: This occurrence consists of muscovite-granite orthogneiss that contains disseminated cassiterite (Dillon and others, 1981 [AOF 133B]). A grab sample of the orthogneiss contains 7 ppm beryllium, 50 ppm tin, and 100 ppm yttrium. The sample was collected near the contact with Proterozoic(?) banded schist (Dillon and others,1986). A composite sample across the contact of the orthogneiss and schist, not far from the location of the orthogneiss sample, contains 5 ppm beryllium, 20 ppm tin, and 70 ppm yttrium.
Workings: Only surface sampling.
Commodities (Major) - Sn; (Minor) - Be, Y
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
1 valid mineral.
Detailed Mineral List:
| ⓘ Cassiterite Formula: SnO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Cassiterite | SnO2 |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
Other Databases
| Link to USGS - Alaska: | WI041 |
|---|
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.
