Lakina Prospect, Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi
Regional Level Types | |
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Lakina Prospect | Prospect |
Chistochina Mining District | Mining District |
Valdez-Cordova Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
61° 33' 30'' North , 143° 23' 45'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
198442
Long-form identifier:
mindat:1:2:198442:5
GUID (UUID V4):
aa92e138-d9c5-4ead-8c24-ecea34ae4db4
The locality is in the Wrangell-Saint Elias National Park and Preserve.
Location: This prospect is on the west valley wall of upper Lakina River. It is at an elevation of about 4,600 feet, 4,500 feet east-southeast of elevation 5710, and 8,800 feet north-northwest of the confluence of Mill Creek and Lakina River. The site is just inside the center of the south boundary of section 34, T. 3 S., R. 11 E. of the Copper River Meridian. This is locality 101 of MacKevett (1976); the location is accurate to within about 100 feet. Cobb and MacKevett (1980) included this prospect under the name 'Lakina R.'.
Geology: This prospect consists of two shear zones, each less than 1 meter thick, that contain chalcocite, bornite, covellite, malachite, and azurite (Moffit and Maddren, 1909; MacKevett, 1976). The shear zones cut Triassic Nikolai Greenstone and a nearby brecciated flow top in the Nikolai contains native copper. The deposits were explored by numerous surface workings and an adit. Some exploration was done as recently as the 1950s (MacKevett, 1976).
Workings: The deposits were explored by numerous surface workings and an adit. Some exploration was done as recently as the 1950s (MacKevett, 1976).
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: Undetermined.
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
6 valid minerals.
Detailed Mineral List:
ⓘ Azurite Formula: Cu3(CO3)2(OH)2 |
ⓘ Bornite Formula: Cu5FeS4 |
ⓘ Chalcocite Formula: Cu2S |
ⓘ Copper Formula: Cu |
ⓘ Covellite Formula: CuS |
ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
ⓘ | Copper | 1.AA.05 | Cu |
Group 2 - Sulphides and Sulfosalts | |||
ⓘ | Chalcocite | 2.BA.05 | Cu2S |
ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
ⓘ | Covellite | 2.CA.05a | CuS |
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 |
S | Sulfur | |
S | ⓘ Bornite | Cu5FeS4 |
S | ⓘ Chalcocite | Cu2S |
S | ⓘ Covellite | CuS |
Fe | Iron | |
Fe | ⓘ Bornite | Cu5FeS4 |
Cu | Copper | |
Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
Cu | ⓘ Bornite | Cu5FeS4 |
Cu | ⓘ Chalcocite | Cu2S |
Cu | ⓘ Covellite | CuS |
Cu | ⓘ Copper | Cu |
Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
Link to USGS - Alaska: | MC071 |
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Other Regions, Features and Areas containing this locality
North America
- Wrangell MountainsMountain Range
North America PlateTectonic Plate
- Wrangellia DomainDomain
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