Unnamed Prospect (ARDF - HE025; on Colorado Creek), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Prospect (ARDF - HE025; on Colorado Creek) | - not defined - |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 15' 0'' North , 149° 33' 36'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: Placer claims have been recorded along Colorado Creek from the junction with the West Fork Chulitna River upstream for about 2 miles. The map site is in sec. 24, T. 19 S., R. 11 W., of the Fairbanks Meridian. This is locality 4 of Cobb (1978: OFR 78-1062), and locality E-6 of Balen (1990: OFR 34-90).
Geology: The location of the Colorado Creek gold placer is uncertain, and there is no evidence of even minor production. The drainage area includes faulted Mesozoic and Paleozoic sedimentary and volcanic rocks that have been metamorphosed, intruded by a variety of dikes and stocks, and cut by polymetallic veins. Of interest are early reports that the placer concentrate contains bismuthinite, marcasite and rather coarse gold (Cobb, 1978: OFR 78-1062). Veins having this mineralogy occur north of the Golden Zone mine (HE043), and possibly also in the Colorado Creek drainage area.
Workings: Surface exploration.
Age: Quaternary.
Commodities (Major) - Au; (Minor) - Bi
Development Status: Undetermined.
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:
| ⓘ Bismuthinite Formula: Bi2S3 |
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Bismuthinite | 2.DB.05 | Bi2S3 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Bismuthinite | Bi2S3 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Bi | Bismuth | |
| Bi | ⓘ Bismuthinite | Bi2S3 |
Other Databases
| Link to USGS - Alaska: | HE025 |
|---|
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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