Unnamed Prospect (ARDF - ID135; southwest of upper Granite Creek), Iditarod Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
62° 21' 52'' North , 156° 57' 3'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This prospect is at an elevation of about 1,100 feet on a flat terrace east of the head of Granite Creek. It is about 0.7 mile southwest of hill 1235 and near the center of the north boundary of section 7, T. 26 N., R. 41 W., of the Seward Meridian. The location is accurate.
Geology: This prospect consists of a series of shear zones associated with thin quartz-sulfide veinlets in a light-colored granitic rock of alaskite composition and quartz-calcite veins in sandstone (Bundtzen, Miller, and Laird, 1986; Miller and Bundtzen, 1994, and Miller, Bundtzen, and Gray, 2005). The alaskite forms two dikes, each about 30 feet thick, with thin, 0.4- to 1-inch-thick quartz-sulfide veins on fractures and joints. The dikes strike N82-88E and are vertical. Quartz-calcite veins occur in sandstone adjacent to the dike rocks The dikes are part of the same dike swarm that hosts gold-antimony mineralization at the Wyrick lode (ID133). Grab samples of mineralization contained 500 parts per billion (ppb) silver, 48 parts per million (ppm) antimony, 560 ppb mercury, and 40 ppm arsenic. Although gold was not detected in these samples, fine gold was panned from an exploration trench (L.E. Wyrick, oral communication, 1986; Bundtzen, Miller, and Laird, 1986).
Workings: Prospect pits were sunk on the property sometime before 1984. In 1985, L.E. Wyrick cut a 160-feet-long trench,which was sampled by Bundtzen, Miller, and Laird (1986). Battle Mountain Mining Company explored the area in the 1980s (Szumigala, 1993).
Age: Unknown; a nearby intrusion has a 40K/40Ar age of 71.1 Ma (Miller and Bundtzen, 1994).
Commodities (Major) - Au; (Minor) - Ag, As, Hg, Sb
Development Status: None
Deposit Model: Polymetallic veins (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
3 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Stibnite | 2.DB.05 | Sb2S3 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Stibnite | Sb2S3 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Sb | Antimony | |
| Sb | ⓘ Stibnite | Sb2S3 |
Other Databases
| Link to USGS - Alaska: | ID135 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell buried DomainDomain
- Farewell TerranePassive Margin
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