French Creek Occurrence, Fairhaven Mining District, Northwest Arctic Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| French Creek Occurrence | Occurrence |
| Fairhaven Mining District | Mining District |
| Northwest Arctic Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 28' 47'' North , 162° 32' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: French Creek is a south tributary to Holtz Creek, a west tribuary to Independence Creek. Sainsbury (1975, p. 85) originally described the location as a chalcopyrite vein in a limestone cliff on the north side of the headwaters to Independence Creek. The bedrock geology (Till and others, 1986) that best matches this location description is used here. This location is very approximate, probably within 1 to 2 miles. It is locality 33 of Gamble (1988).
Geology: Sainsbury (1975, p. 85) describes this occurrence as a 4 inch-wide chalcopyrite vein in a limestone (marble) cliff. This exposure is supposed to be on the north side of the headwaters to Independence Creek and near to a large magnetic anomaly. Till and others (1986) show exposures of Paleozoic marble on both sides of French Creek at this location. This is the only place in the headwaters of Independence Creek that the bedrock geology appears to match Sainsbury's (1975, p. 85) original description.
Workings: No workings are known at this location.
Age: Cretaceous ?; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.
Commodities (Major) - Cu
Development Status: No
Deposit Model: Sulfide vein in marble
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
1 valid mineral.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | BN082 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Brooks-Seward DomainDomain
- Nome ComplexAccretionary Complex
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