Unnamed Occurrence (ARDF - MC170; north of upper Eagle Creek), Nizina Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MC170; north of upper Eagle Creek) | - not defined - |
| Nizina Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 20' 29'' North , 142° 19' 51'' West
Latitude & Longitude (decimal):
Köppen climate type:
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This occurrence is on the ridge north of upper Eagle Creek. It is at an elevation of about 7,000 feet, 2,500 feet west-southwest of elevation 7415 near the southeast corner of section 15, T. 6 S., R. 17 E. of the Copper River Meridian. This is locality 50 of MacKevett (1976); the location is accurate to within a few hundred feet.
Geology: This occurrence consists of a series of stibnite-bearing quartz-calcite veins up to 25 centimeters thick that cut Triassic Nizina Limestone (MacKevett and Smith, 1972; MacKevett, 1976). Samples from this occurrence contain up to 1.2 parts per million (ppm) gold, 700 ppm arsenic, more than 10,000 ppm antimony, and 7,000 ppm tungsten (MacKevett and Smith, 1968, samples 62, 63, 65, and 66). The host rocks are Triassic limestone but other gold-bearing veins in the area (such as MC173) are Tertiary.
Workings: Only limited surface sampling.
Age: Tertiary? The host rocks are Triassic but other gold-bearing veins in the area (such as MC173) are Tertiary.
Commodities (Major) - Sb; (Minor) - As, Au, W
Development Status: None
Deposit Model: Vein
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: | MC170 |
|---|
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