Unnamed Occurrence (ARDF - GU032; near the head of Granite Creek), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
62° 52' 44'' North , 144° 4' 44'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Mentasta Lake | 112 (2011) | 16.4km |
| Slana | 147 (2011) | 20.0km |
Location: The occurrence is at the head of Granite Creek near the west side of a small unnamed lake. It is approximately centered on the north-half of the boundary between sections 27 and 28, T. 12 N., R. 7 E., Copper River Meridian. The location is approximate but is within one-half mile.
Geology: A magnetite skarn occurs in the head of Granite Creek in a region mainly composed of mixed dioritic rocks of Richter's Jurassic 'tectonic quartz-diorite unit' (Richter, 1966). Gold can be panned from the streams that drain the skarn (Kirk Stanley, written communication, 2000). The skarn is on the west side of the diorite complex (WGM Inc., 1979).
Workings: Only natural exposures examined during reconnaissance exploration.
Age: Possibly associated with emplacement of Richter's (1966) Jurassic, quartz-diorite complex.
Commodities (Major) - Fe; (Minor) - Au
Development Status: None
Deposit Model: Iron skarn (Cox and Singer, 1986; model 18d)
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:
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | GU032 |
|---|
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