Unnamed Occurrence (ARDF - TK096; upper Black River), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TK096; upper Black River) | - not defined - |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 16' 19'' North , 148° 5' 31'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Chickaloon | 272 (2011) | 56.2km |
| Glacier View | 234 (2017) | 56.4km |
MAS/MIL number 20760098.
Location: This occurrence is at an elevation of about 5,350 feet on the east, valley wall at the head of Black River, about a mile to the east of a large, unnamed glacier. It is about 0.5 mile northeast of the center of sec. 11, T. 25 N., R. 7 E., Seward Meridian. The location is accurate to within 1/2 mile.
Geology: This occurrence consists of chalcopyrite- and molybdenite-bearing granitic and andesitic float. It is in an area underlain by Jurassic granodiorite cut by northeast-trending shear zones and intruded by andesite(?) dikes (Csejtey and others, 1978). Samples of mineralized float contain up to 0.15 part per million gold, 446 parts per million molybdenum, 180 parts per million tungsten, and 0.69 percent copper (Kurtak and others, 1992). Placer samples are locally anomalous in gold, lead, tungsten, and zinc (Kurtak and others, 1992).
Workings: Limited sampling by the U.S. Bureau of Mines (Kurtak and others, 1992).
Alteration: Altered granitic rocks are limonite-stained near altered andesitic dikes. The andesite locally is copper stained (Kurtak and others, 1992).
Commodities (Major) - Cu, Mo; (Minor) - Au, W
Development Status: None
Deposit Model: Porphyry Cu-Au or Porphyry Cu-Mo? (Cox and Singer, 1986; model 20c or 21a?)
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:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Molybdenite Formula: MoS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Molybdenite | 2.EA.30 | MoS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Molybdenite | MoS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
Other Databases
| Link to USGS - Alaska: | TK096 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Peninsular-Talkeetna DomainDomain
- Peninsular TerraneVolcanic Arc
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