Unnamed Occurrence (ARDF - WI127; near summit of Smith Creek Dome), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
67° 28' 32'' North , 150° 10' 8'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of 3,800 feet, about 0.1 mile southeast of the summit of Smith Creek Dome. The location is accurate.
Geology: The only information on this occurrence is based on two rock samples collected from an outcrop; one is a sample of a quartz vein cutting quartz-mica schist (Eden, 2000, no. 10741), and the other a sample of quartz-muscovite schist that contained pyrite cubes and iron oxide (Eden, 2000, no. 10720). The quartz-vein sample contains 46 ppb gold; the schist sample contains 2,234 ppb gold, 7.2 ppm silver and 3,500 ppm lead. The rocks on top of Smith Creek Dome are Upper Devonian, banded quartzite, interbedded with chloritic quartzite and quartz-mica schist (Eden, 2000). Eden (2000) reports gold-quartz veins at several localities in the general Nolan Creek area, including this occurrence. These veins generally are narrow, 1 mm to a few cm in width, strike northwest-southeast, and dip nearly vertically. The vein mineralogy varies. . Most consist primarily of quartz and lesser amounts of calcite, ankerite and dolomite, with gold and arsenopyrite. Accessory minerals include pyrite, marcasite, chalcopyrite, pyrrhotite, hematite, sphalerite, galena, and rutile. Stibnite is rare in these veins.
Workings: Only surface sampling.
Alteration: No observed wallrock alteration.
Commodities (Major) - Ag, Au; (Minor) - Pb
Development Status: None
Deposit Model: Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)
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
4 valid minerals.
Detailed Mineral List:
| ⓘ Galena ? Formula: PbS |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Galena ? | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | WI127 |
|---|
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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