Unnamed Occurrence (ARDF - SR287; head of Fourth of July Creek), Seward Mining District, Kenai Peninsula Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - SR287; head of Fourth of July Creek) | - not defined - |
| Seward Mining District | Mining District |
| Kenai Peninsula Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
60° 5' 45'' North , 149° 13' 15'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Bear Creek | 1,956 (2017) | 12.3km |
| Seward | 2,790 (2017) | 12.4km |
| Primrose | 111 (2006) | 31.9km |
| Moose Pass | 219 (2014) | 44.3km |
Location: The occurrence is located in the NE1/4 section 14, T. 1 S., R. 1 E., of the Seward Meridian. It is at an elevation of about 2,500 feet between two headwater tributaries of Fourth of July Creek (see the A-7 quadrangle). This is location 94 of Tysdal (1978 [MF-880-A]) and location S-193 of Jansons and others (1984). This location is accurate to within 300 feet.
Geology: The occurrence consists of disseminated pyrite in iron-stained pillow basalt. A sample contained 300 ppm copper and 500 ppm zinc (Tysdal, 1978 [MF-880-A]). Bedrock in this area belongs to the Resurrection Bay Ophiolite complex, which is part of the Valdez Group of Late Cretaceous age (Nelson and others, 1985). No other information is reported in the literature.
Workings: A grab sample contained 300 ppm copper and 530 ppm zinc (Tysdal, 1978 [MF-880-A]). No additional information is available in the literature.
Age: Cretaceous or younger; the mineralization is in rocks of the Valdez Group of Late Cretaceous age.
Commodities (Major) - Cu
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | SR287 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Chugach DomainAccretionary Complex
- Prince WilliamAccretionary Complex
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