Unnamed Occurrence (ARDF - MC008; near head of Geohenda Creek), Chisana Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MC008; near head of Geohenda Creek) | - not defined - |
| Chisana Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 53' 26'' North , 141° 56' 16'' West
Latitude & Longitude (decimal):
Köppen climate type:
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This occurrence is near the head of Geohenda Creek. It is at an elevation of about 5,250 feet, 4,000 feet northeast of elevation 5390 and 2,000 feet northwest of elevation 5490. The site is 2,000 feet south of the center of section 4, T. 1 N., R. 19 E., of the Copper River Meridian. This is locality 184A of MacKevett (1976); the location is probably accurate to within 1,000 feet.
Geology: This occurrence consists of native copper, malachite, and cuprite that fill amygdules in a small isolated outcrop of Triassic Nikolai Greenstone (MacKevett, 1976). Copper mineralization is common in Nikolai Greenstone and is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic to Early Cretaceous (MacKevett and others, 1997).
Workings: Limited surface examination.
Age: Cretaceous? Copper mineralization is common in Nikolai Greenstone and is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic to Early Cretaceous (MacKevett and others, 1997).
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
3 valid minerals.
Detailed Mineral List:
| ⓘ Cuprite Formula: Cu2O |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Native Copper Formula: Cu |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cuprite | 4.AA.10 | Cu2O |
| 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 | ⓘ Cuprite | Cu2O |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | Copper | |
| Cu | ⓘ Cuprite | Cu2O |
| Cu | ⓘ Native Copper | Cu |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | MC008 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Wrangell MountainsMountain Range
North America PlateTectonic Plate
- Wrangellia DomainVolcanic Arc
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