Unnamed Occurrence (ARDF - ID101; northeast shoulder of Swinging Dome), Iditarod Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
62° 20' 20'' North , 158° 15' 7'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Crooked Creek | 105 (2016) | 52.6km |
Location: This occurrence is at an elevation of about 850 feet on the northeast slope of Swinging Dome about 0.8 mile northeast of its summit. The occurrence is about 0.3 mile south-southwest of the center of section 18, T. 26 N., R. 48 W., Seward Meridian. The location is accurate.
Geology: This occurrence is a sulfide and tourmaline-bearing silicified zone at the contact between a Tertiary intrusive body and hornfels derived from the Upper Cretaceous, Kuskokwim Group (Miller and Bundtzen, 1994; Bundtzen and others, 1992; Bundtzen and Miller, 1997; Miller, Bundtzen, and Gray, 2005). The Swinging Dome intrusive is 60.9 Ma. Disseminated sulfides locally make up to 10 percent of the silicified zones. Several felsic dikes intrude the contact zone. One grab sample of mineralization contained 20 parts per million (ppm) tin, 20 ppm antimony, 40 ppm arsenic, and 2,000 ppm boron (McGimsey and others, 1988; Bundtzen and others, 1992).
Workings: Samples were collected by the U.S. Geological Survey and Alaska Division of Geological and Geophysical Surveys in the 1980s (McGimsey and others, 1988; Bundtzen and others, 1992).
Age: Unknown; the Swinging Dome intrusion that may be related to the deposit is 60.9 Ma (Miller and Bundtzen, 1994).
Alteration: Tourmaline and silicification in contact zone.
Commodities (Major) - Sb, Sn; (Minor) - As, B
Development Status: None
Deposit Model: Possibly Sn-polymetallic deposit model or Polymetallic vein (Cox and Singer, 19
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:
| ⓘ Quartz Formula: SiO2 |
| ⓘ 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
List of minerals for each chemical element
| B | Boron | |
|---|---|---|
| B | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | Oxygen | |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
Other Databases
| Link to USGS - Alaska: | ID101 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Angayucham TerraneAccretionary Complex
- Farewell buried DomainDomain
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