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Unnamed Occurrence (ARDF - BN123; in headwaters of Nutmoyuk Creek), Koyuk Mining District, Nome Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - BN123; in headwaters of Nutmoyuk Creek) | - not defined - |
| Koyuk Mining District | Mining District |
| Nome Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 15' 10'' North , 162° 21' 50'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is on the ridge crest along the north side of Death Valley between the headwaters of Nutmoyuk Creek and north tributaries to the Tubutulik River. It is about 1,000 feet south of elevation 1,920 and 3,000 feet southeast of the pass at the head of Nutmoyuk Creek (see BN086). It is locality 41 of Gamble (1988).
Geology: This is an area of marble and calc-silicate rock in the eastern-most Bendeleben Mountains. The carbonate rocks here are separated from other high-grade metamorphic rocks to the west by a high-angle fault that crosses the ridge at the saddle between Nutmoyuk Creek and Death Valley (Till and others, 1986). A sample of a pyrite-fluorite vein in calc-silicate rock here contained 0.5 ppm Au (Gamble, 1988).
Workings: It is not known it exploration activities have been undertaken here. Mining claims existed in the area in 1975 (see BN086).
Age: Cretaceous ?; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.
Commodities (Major) - Au
Development Status: None
Deposit Model: Quartz and fluorite vein in calc-silicate rock
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
List of minerals for each chemical element
| F | Fluorine | |
|---|---|---|
| F | ⓘ Fluorite | CaF2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | ⓘ Fluorite | CaF2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
Other Databases
| Link to USGS - Alaska: | BN123 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Brooks-Seward DomainDomain
- Nome ComplexAccretionary Complex
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