Unnamed Occurrence (ARDF - MC204; south of Chitina River), Nizina Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MC204; south of Chitina River) | - 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° 1' 15'' North , 142° 13' 37'' West
Latitude & Longitude (decimal):
Köppen climate type:
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This occurrence is in the headwaters of Coffee Creek, a south tributary to the Chitina River. It is on the west side of a cirque valley at an elevation of about 5,200 feet, 6,000 feet southwest of elevation 5816. The occurrence is about 2,100 feet north of the center of section 9, T. 10 S., R. 18 E. of the Copper River Meridian. This is locality 5 of MacKevett (1976); the location is accurate to within about 1,000 feet.
Geology: This occurrence consists of sulfide minerals in quartz veins to 15 centimeters wide and disseminated sulfides in Jurassic quartz diorite of the Chitina Valley batholith (MacKevett, 1976, 1978). A sample of selected quartz vein material contained 30 parts per million (ppm) silver, 2 ppm gold, 20,000 ppm copper, and 70 ppm molybdenum. K/Ar dates for the host Chitina Valley batholith range from 138 to 146 +/- 4 Ma (MacKevett, 1978).
Workings: Limited surface sampling.
Age: Late Jurassic(?) based on K/Ar dates for the host Chitina Valley batholith which range from 138 to 146 +/- 4 Ma (MacKevett, 1978).
Alteration: Silicification.
Commodities (Major) - Ag, Au, Cu, Mo
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
1 valid mineral.
Detailed Mineral List:
| ⓘ Chalcopyrite ? Formula: CuFeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite ? | 2.CB.10a | CuFeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | MC204 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Peninsular TerraneVolcanic Arc
- Wrangellia DomainVolcanic Arc
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