Unnamed Prospect (ARDF - MH190; south of Fielding lake), Delta River Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Prospect (ARDF - MH190; south of Fielding lake) | - not defined - |
| Delta River Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 6' 31'' North , 145° 46' 4'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
202279
Long-form identifier:
mindat:1:2:202279:9
GUID (UUID V4):
ec60f129-8ace-4225-b2bf-8b7bcc6fb01a
Location: This prospect is at an elevation of 3,300 feet on the east bank of the principal south tributary of Fielding Lake. It is in the NW1/4SE1/4 section 11, T. 21 S., R. 10 E., Fairbanks Meridian. It corresponds to locality 2 in Rose (1966 [ADMM GR 19]) and locality S86 in table 2 of Nokleberg and others (1991).
Geology: This prospect is a copper-stained quartz vein about 1 foot thick that cuts fine-grained gabbro and minor pyroxenite. Nearby sparse float of gabbro contains disseminated chalcopyrite and pyrrhotite (Rose, 1966 [ADMM GR 19]). The vein strikes N10W and dips vertically. The rocks are part of the Tangle ultramafic-mafic intrusive complex of Late Triassic age, which may be a lopolithic feeder of the Nikolai greenstone basalt flows of the Wrangellia Terrane (W.T. Ellis, oral communication, 2001). The Tangle complex is a north-dipping layered intrusion of dunite, peridotite, and gabbro that varies from less than 2,000 feet thick to more than 4,000 feet thick and extends for more than 12 miles in length (W.T. Ellis, oral communication, 2001). The complex intrudes the Tangle Formation of Permian age (Nokleberg and others, 1991). It may connect with the Fish Lake complex at depth below the Amphitheater synform. Magmatic mineralization is synchronous with emplacement of Tangle complex, which is part of a 120-mile-long belt of mafic-ultramafic and associated rocks in the east-central Alaska Range.
Workings: Several small pits have been dug on the quartz vein. The prospect is on active claims of MAN Resources.
Age: Late Triassic and Cretaceous.
Commodities (Major) - Cu, Ni; (Minor) - Pd (?), Pt (?)
Development Status: None
Deposit Model: Ni-Cu-PGE in differentiated mafic-ultramafic sill; Basaltic Cu (Cox and Singer,
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
3 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | MH190 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Wrangellia DomainDomain
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