Unnamed Occurrence (ARDF - HE067; northeast wall of Eldridge Glacier), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 0' 36'' North , 149° 59' 24'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Mindat Locality ID:
200755
Long-form identifier:
mindat:1:2:200755:0
GUID (UUID V4):
836ffdd9-208f-4f07-8b61-bdc43786586a
Location: This occurrence is at an elevation of about 2,400 feet in a stream valley draining the northeast wall of Eldridge Glacier. It is in sec. 14, T. 22 S., R. 13 W., of the Fairbanks Meridian. The localion is accurate to within 0.5 mile. This is locality 27 of Cobb (1978: OFR 78-1062).
Geology: The country rocks in the area of this occurrence are a tectonically intermixed assemblage of Upper Devonian serpentinite, basalt, chert, and gabbro. The occurrence consists of massive pyrite and chalcopyrite in irregular and veinlike masses in serpentinite. Some of the chalcopyrite is oxidized to malachite. Rock samples contained 15 ppm silver, 0.1 ppm gold, 50 ppm nickel and 7.5% copper (Hawley and Clark, 1974). The sulfide minerals herein are assumed to be remobilized syngenetic magmatic segregations in the mafic host rocks.
Workings: Rock samples contained 15 ppm silver, 0.1 ppm gold, 50 ppm nickel and 7.5% copper (Hawley and Clark, 1974).
Age: Probably Late Devonian, remobilized in Late Mesozoic or Tertiary.
Commodities (Major) - Cu; (Minor) - Ag, Au, Ni
Development Status: None
Deposit Model: Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
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:
| β Chalcopyrite Formula: CuFeS2 |
| β Malachite Formula: Cu2(CO3)(OH)2 |
| β Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | β Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | β Malachite | Cu2(CO3)(OH)2 |
| S | Sulfur | |
| S | β Chalcopyrite | CuFeS2 |
| S | β Pyrite | FeS2 |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
| Cu | β Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | HE067 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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References
