Cliff; Fog Prospects, Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi
Regional Level Types | |
---|---|
Cliff; Fog Prospects | Group of Prospects |
Chistochina Mining District | Mining District |
Valdez-Cordova Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
61° 39' 11'' North , 144° 7' 33'' West
Latitude & Longitude (decimal):
Type:
Group of Prospects
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Chitina | 126 (2017) | 22.6km |
Mindat Locality ID:
196956
Long-form identifier:
mindat:1:2:196956:9
GUID (UUID V4):
9d1d0f63-8c66-46f3-8e0e-4f8ed423d929
This prospect is within the Wrangell-St. Elias National Park.
Location: These prospects are located east of Deception Creek on the north side of Elliott Creek valley; they are at an elevation of about 4,100 feet in the NW1/4 section 34, T. 2 S., R. 7 E., of the Copper River Meridian. The prospects are approximately located, perhaps to within one-half mile. They are incuded in locality 64 of Cobb and Matson (1972) and locality 54 of Winkler and others (1981 [OFR 80-892-B]).
Geology: These prospects are near the Albert Johnson prospect (VA034) north of the headwaters of Elliott Creek. At the Albert Johnson prospect, bornite, chalcopyrite, and some native copper occur in small sheeted veins and replacement deposits in fractured Triassic Nikolai Greenstone (Mendenhall and Schrader, 1903; Moffit, 1918, p. 156-157). In general, thin veins, films and disseminations of bornite, chalcocite, and pyrite cut Triassic Nikolai Greenstone in this area (Moffit and Maddren, 1908,1909; Moffit and Mertie, 1923). Gangue minerals are commonly quartz, calcite, and epidote; secondary copper minerals include malachite, azurite and some chalcanthite. Some mineralization occurs as irregular pods in greenstone. The Nikolai Greenstone and overlying Chitistone Limestone are deformed into a large, asymmetric anticline with its axis approximately parallel to Elliott Creek. The copper mineralization is believed to be related to the regional mineralizing event that produced the rich Kennecott copper deposits in the McCarthy quadrangle (MacKevett and others, 1997).
Workings: These prospects were mostly explored with open cuts (Moffit and Mertie, 1923).
Age: The copper mineralization is believed to be related to the mineralizing event that produced the rich Kennecott copper deposits in the McCarthy quadrangle to the east (MacKevett and others, 1997). This event is interpreted to have accompanied Late Jurassic or Early Cretaceous deformation and metamorphism (MacKevett and others 1997, p. 88).
Commodities (Major) - Cu; (Minor) - Ag
Development Status: None
Deposit Model: Veins, disseminations, and fracture fillings in greenstone; probably related to
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
9 valid minerals.
Detailed Mineral List:
β Azurite Formula: Cu3(CO3)2(OH)2 |
β Bornite Formula: Cu5FeS4 |
β Calcite Formula: CaCO3 |
β Chalcocite Formula: Cu2S |
β Chalcopyrite Formula: CuFeS2 |
β Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
β Malachite Formula: Cu2(CO3)(OH)2 |
β Pyrite Formula: FeS2 |
β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Chalcocite | 2.BA.05 | Cu2S |
β | Bornite | 2.BA.15 | Cu5FeS4 |
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
β | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
β | Calcite | 5.AB.05 | CaCO3 |
β | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
Group 9 - Silicates | |||
β | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Azurite | Cu3(CO3)2(OH)2 |
H | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
H | β Malachite | Cu2(CO3)(OH)2 |
C | Carbon | |
C | β Azurite | Cu3(CO3)2(OH)2 |
C | β Calcite | CaCO3 |
C | β Malachite | Cu2(CO3)(OH)2 |
O | Oxygen | |
O | β Azurite | Cu3(CO3)2(OH)2 |
O | β Calcite | CaCO3 |
O | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
O | β Malachite | Cu2(CO3)(OH)2 |
O | β Quartz | SiO2 |
Al | Aluminium | |
Al | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | Silicon | |
Si | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | β Quartz | SiO2 |
S | Sulfur | |
S | β Bornite | Cu5FeS4 |
S | β Chalcopyrite | CuFeS2 |
S | β Chalcocite | Cu2S |
S | β Pyrite | FeS2 |
Ca | Calcium | |
Ca | β Calcite | CaCO3 |
Ca | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Fe | Iron | |
Fe | β Bornite | Cu5FeS4 |
Fe | β Chalcopyrite | CuFeS2 |
Fe | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Fe | β Pyrite | FeS2 |
Cu | Copper | |
Cu | β Azurite | Cu3(CO3)2(OH)2 |
Cu | β Bornite | Cu5FeS4 |
Cu | β Chalcopyrite | CuFeS2 |
Cu | β Chalcocite | Cu2S |
Cu | β Malachite | Cu2(CO3)(OH)2 |
Other Databases
Link to USGS - Alaska: | VA053 |
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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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