Unnamed Occurrence (ARDF - WI062; ridge between Madison and Crevice Creeks), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
67° 21' 2'' North , 151° 41' 23'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is on a ridge between Crevice Creek and Madison Creek at an elevation of 3900 feet, near the center of section 12, T. 29 N., R. 19 W., of the Fairbanks Meridian. This is the site of sample 71 in Dillon and others (1981 [AOF 133B]). The location is accurate.
Geology: This occurrence consists of a fuchsite-muscovite-calcite quartzite (Dillon and others, 1981 [AOF 133B]) in Middle or Upper Devonian(?), chloritic and carbonate rocks (Dillon and others, 1986). A grab sample contains 1000 ppm chromium, (probably attributable to the fuchsite) and 200 ppm nickel, as well as 500 ppm arsenic, and 200 ppm lead. The analytical data suggest that sphalerite and arsenopyrite might be present but neither was visible in the sample.
Workings: Only surface sampling.
Commodities (Major) - Cr, Ni; (Minor) - Pb, Zn(?)
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Arsenopyrite ? Formula: FeAsS |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Arsenopyrite ? | 2.EB.20 | FeAsS |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
Other Databases
| Link to USGS - Alaska: | WI062 |
|---|
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.
