Unnamed Occurrence (ARDF - MC178; west side of Canyon Creek), Nizina Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MC178; west side of Canyon Creek) | - 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° 16' 22'' North , 142° 11' 13'' West
Latitude & Longitude (decimal):
Köppen climate type:
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This occurrence is on the west valley wall of Canyon Creek. It is at an elevation of about 4,000 feet, 6,000 feet northeast of elevation 6075 and 800 feet from Canyon Creek. The site is in the SE1/4 of section 9, T. 7 S., R. 18 E. of the Copper River Meridian. This is locality 36 of MacKevett (1976); the location is accurate to within about 100 feet.
Geology: This occurrence consists of secondary copper minerals (malachite and azurite?) in a 1- to 2-foot-thick mineralized zone that cuts Triassic Nikolai Greenstone (MacKevett and Smith, 1968, 1972; MacKevett, 1976). The mineralized zone is part of a 15-foot-wide fault zone (MacKevett and Smith, 1968, p. 3). A sample of the mineralization contained 50 parts per million (ppm) silver, 1.3 ppm gold, and more than 20,000 ppm copper (MacKevett and Smith, 1968, sample 108). 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: Only limited surface sampling.
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) - Ag, Au, 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 5 - Nitrates and Carbonates | |||
|---|---|---|---|
| ⓘ | Azurite ? | 5.BA.05 | Cu3(CO3)2(OH)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | Copper | |
| Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | MC178 |
|---|
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