Grand Prize; Bremner Mining Company Mine, Nizina Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Grand Prize; Bremner Mining Company Mine | Mine |
| Nizina Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 3' 24'' North , 143° 25' 29'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This mine is northwest of the head of Golconda Creek. It is at an elevation of about 5,700 feet, upslope from the Lucky Girl mine (MC190) and 5,000 feet northwest of the pass between Golconda and Monahan creeks. The mine is about 2,000 feet east-southeast of the center of section 27, T. 9 S., R. 11 E. of the Copper River Meridian. This is locality 24 of MacKevett (1976) and it is probably accurate to within 1,000 feet.
Geology: The deposit at this mine consists of gold in gouge and in comminuted quartz vein material along the hanging wall of an east-dipping felsic dike (Moffit, 1937; MacKevett, 1976). The dike intrudes metasflysch of the Cretaceous Valdez Group (MacKevett, 1978). The mine was developed by an adit, crosscut, and drifts (Moffit, 1937). Gold-bearing quartz veins in the Valdez Group are generally Early Tertiary in age (Goldfarb and others, 1997).
Workings: The mine was developed by an adit, crosscut, and drifts (Moffit, 1937).
Age: Early Tertiary. Gold-bearing quartz veins in the Valdez Group are generally Early Tertiary in age (Goldfarb and others, 1997).
Alteration: Silicification.
Production: Probably some minor gold production.
Commodities (Major) - Au
Development Status: Yes: small
Deposit Model: Low sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
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.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| 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 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | MC189 |
|---|
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