Gorilla Prospect, Nizina Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Gorilla 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' 56'' North , 142° 52' 44'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
197769
Long-form identifier:
mindat:1:2:197769:4
GUID (UUID V4):
1060e985-5a69-4e39-8308-7719b8fcc663
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This prospect is on the north side of a small cirque valley on the east valley wall of Root Glacier. It is at an elevation of about 4,900 feet, 1,200 feet southeast of elevation 5720 and 4,000 feet east of Root Glacier. The site is in the SE1/4 of section 4, T. 4 S., R. 14 E. of the Copper River Meridian. This is locality 94 of MacKevett (1976); the location is accurate to within about 1,000 feet.
Geology: This prospect is an area of iron- and copper-staining on fractures in Upper Triassic Nizina Limestone (MacKevett, 1972; 1976). It was explored by small and shallow workings. Larger copper deposits in the area (e.g., MC083, MC090, MC091, and MC093) are localized stratigraphically below the Nizina in the lower part of the Chitistone Limestone. 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: This prospect was explored by small and shallow workings.
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) and/or Kennecott-type copper depos
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:
| ⓘ Malachite ? Formula: Cu2(CO3)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| 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 |
| Cu | Copper | |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | MC080 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Wrangell MountainsMountain Range
North America PlateTectonic Plate
- Wrangellia DomainDomain
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References
