Unnamed Occurrence (ARDF - MC171; east of upper Canyon Creek), Nizina Mining District, Valdez-Cordova Census Area, Alaska, USAi
Regional Level Types | |
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Unnamed Occurrence (ARDF - MC171; east of upper 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° 20' 12'' North , 142° 10' 29'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201067
Long-form identifier:
mindat:1:2:201067:3
GUID (UUID V4):
da4ee6bd-830d-4c05-a9ef-01565f777625
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This occurrence is on the ridge crest between Twaharpies Glacier and Canyon Creek. It is at elevation 7470 in the NW1/4 of section 22, T. 6 S., R 18 E. of the Copper River Meridian. This is locality 46 of MacKevett (1976); the location is accurate to within about 100 feet.
Geology: This occurrence consists of a 6-foot-wide fault zone that contains narrow veins with chalcocite and malachite (MacKevett and Smith, 1968; MacKevett, 1976). A sample of the mineralization contained up to 7 parts per million (ppm) silver, 1,000 ppm arsenic, and more than 20,000 ppm copper. The fault zone cuts Triassic Nikolai Greenstone (MacKevett and Smith, 1972). 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).
Alteration: Oxidation.
Commodities (Major) - Cu; (Minor) - Ag, As
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.
Detailed Mineral List:
ⓘ Chalcocite Formula: Cu2S |
ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Chalcocite | 2.BA.05 | Cu2S |
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 | ⓘ Chalcocite | Cu2S |
Cu | Copper | |
Cu | ⓘ Chalcocite | Cu2S |
Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
Link to USGS - Alaska: | MC171 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Wrangellia DomainDomain
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