Unnamed Occurrence (ARDF - ID045; west flank of Takotna Mountain), Innoko Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - ID045; west flank of Takotna Mountain) | - not defined - |
| Innoko 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):
62° 56' 3'' North , 156° 3' 32'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| McGrath | 344 (2017) | 23.5km |
Location: This occurrence is near upper Beef Steak Creek at an elevation of about 1,300 feet. It is about 1.5 mile west to north-northwest of the top of Takotna Mountain in the SW1/4, section 23, T. 33 N., R. 36 W., of the Seward Meridian. The location is accurate.
Geology: The rocks in the vicinity of this occurrence are part of the Takotna pluton which has been dated as 71.0 Ma; the pluton intrudes shale and sandstone of the Upper Cretaceous, Kuskokwim Group (Miller and Bundtzen, 1994). Iron-oxide-stained hornfelsed sandstone contains minor disseminated pyrite and is cut by quartz veinlets. Samples contained up to 1,000 parts per million (ppm) chromium, 300 parts per billion (ppb) silver, 1.1 ppm mercury, and 30 ppm arsenic (Bundtzen and Laird, 1983; McGimsey and others, 1988; Miller, Bundtzen, and Gray, 2005).
Workings: Surface sampling was conducted by the Alaska Division of Geological and Geophysical Surveys in in 1978 and by the U.S. Geological Survey in 1985 (Bundtzen and Laird, 1983; McGimsey and others, 1985).
Age: Probably Late Cretaceous, based on its host rock, the Takotna pluton that has been dated at 71.0 Ma (Miller and Bundtzen, 1994).
Alteration: Iron oxides produced by the weathering of pyrite and other (?) sulfides.
Commodities (Major) - Ag; (Minor) - As, Cr, Hg
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
2 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | 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 | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
Other Databases
| Link to USGS - Alaska: | ID045 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell buried DomainDomain
- Farewell TerranePassive Margin
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.
