Unnamed Occurrence (ARDF - NB006; north of Bear Valley), Tok Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - NB006; north of Bear Valley) | - not defined - |
| Tok Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 52' 1'' North , 143° 31' 15'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Mentasta Lake | 112 (2011) | 13.9km |
| Slana | 147 (2011) | 28.6km |
Location: This occurrence is on the crest of the range north of Bear Valley. It is in a saddle at an elevation of 5,450 feet, about 6,500 feet southeast of elevation 5870. The site is just inside the west boundary of NE1/4 of section 33, T. 13 N., R. 10 E. of the Copper River Meridian. This is locality 4 of Richter and others (1975). Cobb and Richter (1980) included this deposit as an 'Unnamed occurrence'. It is located to within a few hundred feet.
Geology: Amygdaloidal basalt of the Triassic, Nikolai Greenstone is heavily stained with azurite and malachite at this location. Copper mineralization is locally 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).
Age: Cretaceous? Alteration and copper mineralization in the Nikolai Greenstone 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 copper (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: | NB006 |
|---|
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