Unnamed Occurrences (ARDF - MH053; northern Clearwater Mountains west of peak 5315), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 14' 49'' North , 146° 49' 40'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This record describes a mineralized area that includes several related deposits that occur from about 4,650 to 4,800 feet in elevation in a west-trending gully about a half-mile west of peak 5315. Another deposit is about 1,000 feet to the south at an elevation of about 4,600 feet. The location, which is near the middle of the south boundary of section 20, T. 19 S., R. 5 E., Fairbanks Meridian, is a general one for the group of occurrences.
Geology: Mineral deposits of this record probably occur in the same low-angle thrust fault zone as those at MH052 and MH054. Rocks at this site include metabasalt of Late Triassic age and limestone, probably of the same age, the inferred host of skarny scheelite deposits. The location of the deposits was shown on a map prepared by G.A. Moerlein (written communication, 1980). The deposits themselves are not described, but by inference from records MH052 and MH054, they are crudely stratabound skarny bodies in the footwall of a major low-angle thrust fault zone.
Workings: Deposits were discovered in about 1980 by either George A. Moerlein or Rodney A. Blakestad during detailed evaluation of a large mineralized area including MH052, MH054, and MH055.
Age: Probably mid- to Late Cretaceous, formed during a period of regional deformation and metamorphism.
Commodities (Major) - W
Development Status: None
Deposit Model: W skarn (?) (Cox and Singer, 1986; model 14a).
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
|---|---|---|---|
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Scheelite | Ca(WO4) |
| Ca | Calcium | |
| Ca | ⓘ Scheelite | Ca(WO4) |
| W | Tungsten | |
| W | ⓘ Scheelite | Ca(WO4) |
Other Databases
| Link to USGS - Alaska: | MH053 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Wrangellia DomainVolcanic Arc
- Yukon-TananaVolcanic Arc
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