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Unnamed Occurrence (ARDF - MC058; west of Squaw Creek), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MC058; west of Squaw Creek) | - not defined - |
| Chistochina Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 34' 11'' North , 143° 53' 38'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201034
Long-form identifier:
mindat:1:2:201034:5
GUID (UUID V4):
a8d621d9-0021-4079-94d8-f192c2eaf51f
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This occurrence is west of Squaw Creek on the north valley wall of the Kuskulana River. It is at an elevation of about 3,900 feet, 2,800 feet east of elevation 4765, and 2,700 feet northeast of the center of section 35, T. 3 S., R. 8 E. of the Copper River Meridian. This is locality 140 of MacKevett (1976) and locality 30 of MacKevett and others (1978). The location is accurate to within about 100 feet.
Geology: This occurrence consists of bornite-bearing veins up to 6 centimeters thick that are localized in a 2-meter-wide, altered fault zone cutting Triassic Nikolai Greenstone (MacKevett, 1976). A sample of the mineralization contained 200 parts per million (ppm) silver, more than 20,000 ppm copper, and 7 ppm molybdenum. The widespread deposition of copper in Triassic greenstone and limestone of the area is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic or Early Cretaceous (MacKevett and others, 1997). Copper-bearing minerals were deposited in the underlying Nikolai Greenstone at about 112 Ma (Silberman and others, 1980).
Age: Cretaceous? The widespread deposition of copper in Triassic greenstone and limestone of the area is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic or Early Cretaceous (MacKevett and others, 1997). Copper-bearing minerals were deposited in the underlying Nikolai Greenstone at about 112 Ma (Silberman and others, 1980).
Commodities (Major) - Ag, Cu; (Minor) - Mo
Development Status: None
Deposit Model: Basaltic Cu (Cox and Singer, 1986; model 23)
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Bornite | Cu5FeS4 |
| Fe | Iron | |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Cu | Copper | |
| Cu | ⓘ Bornite | Cu5FeS4 |
Other Databases
| Link to USGS - Alaska: | MC058 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Wrangell MountainsMountain Range
North America PlateTectonic Plate
- Wrangellia DomainVolcanic Arc
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