Dry Creek Cut Mine, Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Dry Creek Cut Mine | Mine |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 10' 25'' North , 147° 28' 1'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: The Dry Creek Cut is a truncated stream channel that formerly was a southwest-flowing tributary to lower Valdez Creek. It is the downstream extension of the Tammany Channel that has been cut off by present day Valdez Creek. The map site is about 1,000 feet south of the old Denali post office, in the NW1/4 of sec. 24, T. 20 S., R. 1 E., of the Fairbanks Meridian. This location is accurate to within 250 feet.
Geology: The geology of the general area of the Dry Creek Cut is described in records HE194 and HE197. The Dry Creek Cut is the downstream portion of the Tammany paleochannel truncated by the cross-cutting younger Valdez Creek. The base of the paleochannel was higher in elevation than Valdez Creek. The cut was mined from its lower extent upstream as far as was possible without destroying the access road to Denali. The Tammany-Dry Creek paleochannel was filled with large boulders at its base and contained a very high grade placer. The descriptions of the Valdez Creek area (HE194 and HE197) that apply to the Tammany or A paleochannel also apply to the Dry Creek Cut.
Workings: The workings in this cut are impressive. In places, overburden approached 100 feet in depth. Large boulders are hand stacked adjacent to the pay channels that were mined. A telegraph pole(?) and wire are still present. The cut appears to be mined out, except for the pay gravels that remain beneath the road.
Age: The same as Tammany paleochannel. Tammany channel is probably mid-Wisconsin in age (Reger and Bundtzen, 1990).
Production: The total production from the Dry Creek Cut is not known.
Reserves: No reserves remain.
Commodities (Major) - Au
Development Status: Yes; medium
Deposit Model: Placer Au-PGE (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:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | HE195 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Chulitna-Broad Pass DomainDomain
- Yukon-TananaVolcanic Arc
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