Nebraska Prospect, Nizina Mining District, Valdez-Cordova Census Area, Alaska, USAi
Regional Level Types | |
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Nebraska Prospect | Prospect |
Nizina Mining District | Mining District |
Valdez-Cordova Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
61° 32' 24'' North , 143° 10' 8'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
199081
Long-form identifier:
mindat:1:2:199081:5
GUID (UUID V4):
aabb2879-e493-4c34-9451-d4907d733dc9
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This prospect is in the valley of Glacier Gulch, a south tributary to Hidden Creek. It is at an elevation of about 4,300 feet, 4,000 feet south-southeast of elevation 6610 and 3,300 feet northeast of the center of section 11, T. 4 S., R. 12 E. of the Copper River Meridian. This is locality 100 of MacKevett (1976). It is accurate to within about 1,000 feet.
Geology: This prospect consists of veins and fracture coatings of malachite and rare bornite in fractured Triassic Nikolai Greenstone (Moffit and Maddren, 1909; MacKevett, 1976). The prospect was explored by a short adit and surface pits and trenches. 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: The prospect was explored by a short adit and surface pits and trenches.
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).
Alteration: Oxidation.
Commodities (Major) - Cu
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
2 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Malachite | Cu2(CO3)(OH)2 |
C | Carbon | |
C | ⓘ Malachite | Cu2(CO3)(OH)2 |
O | Oxygen | |
O | ⓘ Malachite | Cu2(CO3)(OH)2 |
S | Sulfur | |
S | ⓘ Bornite | Cu5FeS4 |
Fe | Iron | |
Fe | ⓘ Bornite | Cu5FeS4 |
Cu | Copper | |
Cu | ⓘ Bornite | Cu5FeS4 |
Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
Link to USGS - Alaska: | MC084 |
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Other Regions, Features and Areas containing this locality
North America
- Wrangell MountainsMountain Range
North America PlateTectonic Plate
- Wrangellia DomainDomain
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