Unnamed Occurrence (ARDF - ID046; south flank of Takotna Mountain), Innoko Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - ID046; south flank of Takotna Mountain) | - not defined - |
| Innoko Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 55' 24'' North , 156° 0' 28'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| McGrath | 344 (2017) | 21.2km |
Location: This occurrence is on the steep south flank of Takotna Mountain about 0.4 mile south of the summit along the access road to the radar site at the top of the mountain. The occurrence is at an elevation of about 2,100 feet in the NE1/4, section 25, T. 33 N., R. 36 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence is an iron-oxide-stained quartz-cemented breccia in hornfels at the edge of the Takotna pluton. The pluton has been dated as 71.0 Ma (Bundtzen and Laird, 1983; Miller and Bundtzen, 1994). The mineralized quartz-breccia zone was estimated to be at least 6 feet thick. One sample contained 13.7 parts per million (ppm) silver, 280 ppm copper, 1,030 ppm zinc, and 30 parts per billion (ppb) gold (Bundtzen and Laird, 1983; Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005).
Workings: Surface samples were collected in 1977 by the Alaska Division of Geological and Geophysical Surveys (Bundtzen and Laird, 1983).
Age: Probably related to the Takotna pluton that has been dated at 71.0 Ma (Bundtzen and Laird, 1983; Miller and Bundtzen, 1994).
Commodities (Major) - Ag; (Minor) - Au, Cu, 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
1 valid mineral.
Detailed Mineral List:
| ⓘ 'Limonite' |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
Other Databases
| Link to USGS - Alaska: | ID046 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell buried DomainDomain
- Farewell TerranePassive Margin
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