Unnamed Occurrence (ARDF - ID018; ridge between Beaver and Tolstoi Creeks), Innoko Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
62° 59' 1'' North , 156° 49' 40'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of about 1,350 feet on a knob that is about 0.8 mile northeast of hill 2340. It is about 0.2 mile south of the northeast corner of section 3, T. 33 N., R. 40 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence consists of rubble of iron-oxide-stained breccia in hornfels that is probably related to the Cretaceous Beaver Mountains pluton. Manganese-oxide-stained rosettes of tourmaline in the hornfels may be related to a nearby, potassically-altered andesite-porphyry dike. The occurrence is about 2 miles north of the northern contact of the Beaver Mountains pluton (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). Grab samples contain up to 55.0 parts per million (ppm) silver, 1,000 ppm zinc, 500 ppm copper, 100 ppm antimony, and 100 parts per billion (ppb) gold (Bundtzen and Laird, 1982).
Workings: Limited surface sampling was conducted in 1979 (Bundtzen and Laird, 1982).
Age: Probably related to the Beaver Mountains pluton which has been dated at 70.1 Ma (Bundtzen and Laird,1982).
Alteration: Rocks altered to tourmaline greisen.
Commodities (Major) - Ag, Zn; (Minor) - Au, Cu, Sb
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
Detailed Mineral List:
| ⓘ 'Limonite' |
| ⓘ 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z |
| ⓘ 'Wad' |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Unclassified | |||
|---|---|---|---|
| ⓘ | 'Limonite' | - | |
| ⓘ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
| ⓘ | 'Wad' | - | |
List of minerals for each chemical element
| B | Boron | |
|---|---|---|
| B | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | Oxygen | |
| O | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
Other Databases
| Link to USGS - Alaska: | ID018 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Angayucham TerraneAccretionary Complex
- Farewell buried 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.
