Unnamed Occurrence (ARDF - AN086), Willow Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - AN086) | Occurrence |
| Willow Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 37' 46'' North , 148° 39' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Lazy Mountain | 1,479 (2011) | 15.6km |
| Sutton-Alpine | 1,447 (2015) | 17.5km |
| Chickaloon | 272 (2011) | 21.0km |
| Butte | 3,246 (2011) | 22.5km |
| Knik River | 744 (2011) | 23.4km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Mat-Su Rock and Mineral Club | Palmer, Alaska | 25km |
Mindat Locality ID:
202560
Long-form identifier:
mindat:1:2:202560:8
GUID (UUID V4):
9df48f7b-2fba-4bed-9c2f-f8d7f5e13fb5
Concentration of chromite is not economical for mining (Clark, 1972).
Location: Top of unnamed 7,100 ft peak, nearly surrounded by glaciers. Meltwater from glaciers feed Wolverine Creek, Carpenter Creek, and other unnamed tributaries of Matanuska River. Sec. 24, T. 18 N., R. 4 E., of the Seward Meridian. Accurate within 1 mile. Locality 46 from Cobb (1972), and locality 35 of MacKevett and Holloway (1977).
Geology: Ultramafic rocks of the Jurassic Wolverine Complex. According to Clark (1972), dunite contains chromite-rich bands 0.5-1 inch thick at the bases of 6 to 12 inch thick layers of olivine cumulate. Chromite bands comprise approximately 5 percent of outcrop and minor anomalous nickel occurs nearby in associated ophiolitic rocks.
Workings: Surface mapping and sampling.
Age: Lower to Middle Jurassic
Alteration: Slight serpentinization of olivine.
Commodities (Major) - Cr; (Minor) - Ni
Development Status: None
Deposit Model: Podiform chromite or Alaskan PGE (Cox and Singer, 1986; models 8a or 9)
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 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS - Alaska: | AN086 |
|---|
Other Regions, Features and Areas containing this locality
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References
