Unnamed Occurrence (ARDF - MC097; near Contact Gulch), Nizina Mining District, Valdez-Cordova Census Area, Alaska, USAi
Regional Level Types | |
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Unnamed Occurrence (ARDF - MC097; near Contact Gulch) | - 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° 30' 11'' North , 142° 18' 25'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201043
Long-form identifier:
mindat:1:2:201043:7
GUID (UUID V4):
cd9d7a1d-1748-406d-a3f4-b2c13eb44c01
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This occurrence is on a bluff east of lower Contact Gulch. It is at an elevation of about 4,900 feet, 1,500 feet south of the center of section 22, T. 4 S., R 17 E. of the Copper River Meridian. This is locality 84 of MacKevett (1976); the location is accurate to within about 1,000 feet.
Geology: This occurrence consists of bornite-bearing veins to 6 centimeters thick that occur in a 2-meter-wide fault zone that cuts 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).
Workings: Limited surface sampling.
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) - Cu; (Minor) - Ag, 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 | |||
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ⓘ | 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: | MC097 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Wrangellia DomainDomain
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