Unnamed Occurrence (ARDF - WI143; northwest of Gilroy Mountain), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - WI143; northwest of Gilroy Mountain) | - 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° 14' 42'' North , 151° 34' 51'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201958
Long-form identifier:
mindat:1:2:201958:4
GUID (UUID V4):
6b1d9585-5fd7-41a0-a8e6-8dbf6202d226
Location: This occurrence is at an elevation of about 3,300 feet about 2.0 miles west-northwest of the top of Gilroy Mountain. The site corresponds to the location of samples 50 and 51 in Dillon and others (1981). The location is accurate.
Geology: This occurrence consist of a stockworks of small sulfide veins in marble (Dillon and others, 1981 [AOF 133B]). They collected two grab samples. A fine-grained actinolite marble contains narrow veins of chalcopyrite and sphalerite; a gray marble contains veins of arsenopyrite, sphalerite, and traces of chalcopyrite. The arsenopyrite veins were as much as 10 cm thick. The arsenopyrite-bearing sample contains 10 ppm silver, 10% arsenic, 15 ppm gold, 50 ppm bismuth, and 300 ppm antimony. The other sample contained no anomalous metal values. The rocks in the area are mainly Devonian, Ambler metavolcanic rocks (Dillon and others, 1986).
Workings: Only surface sampling.
Commodities (Major) - Ag, As, Au; (Minor) - Bi, Cu, Sb, Zn
Development Status: None
Deposit Model: Polymetallic vein(?) (Cox and Singer, 1986; model 22c)
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
3 valid minerals.
Detailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
Other Databases
| Link to USGS - Alaska: | WI143 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Brooks Range DomainDomain
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.
References
