Slope Creek Mine (ARDF - GU021), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Slope Creek Mine (ARDF - GU021) | Mine |
| Chistochina Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 47' 27'' North , 144° 0' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Slana | 147 (2011) | 9.5km |
| Mentasta Lake | 112 (2011) | 18.6km |
See also Grubstake Creek (GU017) and Boulder Creek (GU016).
Location: Slope Creek (Cobb, 1979, p. 26-27; OF 79-1247), which is unnamed on the Gulkana D-1 topographic map, is a tributary to Porcupine Creek in the SE1/4NE1/4, section 25, T. 12 N., R. 7 E., Copper River Meridian. The creek has been placer mined into the Nabesna D-6 quadrangle and the coordinates above are of the boundary between the two quadrangles. The mine is locality 18 of Richter and Matson (1972) and locality 17 of MacKevett and Holloway (1977). The location is accurate within 500 feet.
Geology: Slope Creek has produced a small amount of placer gold that probably was derived from low-grade porphyry and vein deposits in upper Slope Creek (GU 020). The placer gold is accompanied by magnetite, native silver, native bismuth, native copper, and possibly barite (Moffit, 1944; Richter, 1966). As in Grubstake Creek (GU017) which is over the divide to the west, the gold is fine-grained and wiry, which suggests a short distance of transport (Richter and Matson, 1968).
Workings: Small-scale placer mining took place from about 1934 to the 1950's, and possibly more recently.
Age: Holocene placer.
Production: Placer deposits in Slope and Grubstake Creeks (GU017) have been mined intermittently since 1934. Total production from both is probably less than $30,000 (about 857 ounces) (Richter and Matson, 1968).
Commodities (Major) - Au; (Minor) - Ag, Bi, Cu
Development Status: Yes
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a)
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
6 valid minerals.
Detailed Mineral List:
| ⓘ Baryte ? Formula: BaSO4 |
| ⓘ Bismuth Formula: Bi |
| ⓘ Copper Formula: Cu |
| ⓘ Gold Formula: Au |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Silver Formula: Ag |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Copper | 1.AA.05 | Cu |
| ⓘ | Gold | 1.AA.05 | Au |
| ⓘ | Silver | 1.AA.05 | Ag |
| ⓘ | Bismuth | 1.CA.05 | Bi |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Baryte ? | 7.AD.35 | BaSO4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Baryte | BaSO4 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| S | Sulfur | |
| S | ⓘ Baryte | BaSO4 |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Cu | Copper | |
| Cu | ⓘ Copper | Cu |
| Ag | Silver | |
| Ag | ⓘ Silver | Ag |
| Ba | Barium | |
| Ba | ⓘ Baryte | BaSO4 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
| Bi | Bismuth | |
| Bi | ⓘ Bismuth | Bi |
Other Databases
| Link to USGS - Alaska: | GU021 |
|---|
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