East Fork Chulitna River Occurrences, Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| East Fork Chulitna River Occurrences | Group of Occurrences |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 11' 24'' North , 149° 15' 36'' West
Latitude & Longitude (decimal):
Type:
Group of Occurrences
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Cantwell | 219 (2011) | 27.2km |
Location: This site represents several placer gold occurrences along the East Fork Chulitna River. The occurrences are downstream for a distance of more than 2 miles from the map site, which is in the SW1/4 of sec 10, T. 20 S., R. 9 W., of the Fairbanks Meridian. This is location D-27 of Balen (1990: OFR 34-90).
Geology: Placer samples taken from the East Fork Chulitna River, contain 6.7 ppm gold and 260 ppm tin (Balen, 1990: OFR 34-90). Tin granites are reported on the western side of the Chulitna Valley (for example, HE056), and similar granites are also mapped in the East Fork Chulitna drainage area (Wilson and others, 1998). These granites may be the source of both the tin (cassiterite?) and the placer gold.
Workings: Surface only.
Age: Quaternary.
Commodities (Major) - Au; (Minor) - Sn
Development Status: None
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a)
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:
| ⓘ Cassiterite ? Formula: SnO2 |
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cassiterite ? | 4.DB.05 | SnO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Cassiterite | SnO2 |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | HE137 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Chulitna-Broad Pass DomainDomain
- Peninsular TerraneVolcanic Arc
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