Thunderbird Creek Occurrence, Anchorage Mining District, Anchorage, Alaska, USAi
| Regional Level Types | |
|---|---|
| Thunderbird Creek Occurrence | Occurrence |
| Anchorage Mining District | Mining District |
| Anchorage | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 25' 47'' North , 149° 18' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Gateway | 5,552 (2011) | 16.2km |
| Wasilla | 9,284 (2017) | 18.4km |
| Knik-Fairview | 14,923 (2011) | 18.4km |
| Eagle River | 24,793 (2013) | 18.7km |
| Butte | 3,246 (2011) | 18.9km |
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 | 21km |
| Chugach Gem & Mineral Society | Anchorage, Alaska | 40km |
Location: On ridge, at 1,690 ft elevation, between Thunderbird Creek and Eklutna River. Accurate within 1,000 ft. Locality 40 of Cobb (1972) and locality 30 of MacKevett and Holloway (1977).
Geology: Jurassic dunite of the Eklutna Sequence contains chromite-rich bands. Chromite occurs as discontinuous stringers and lenses of varying grades. Although the exposure is not as good, this prospect appears to be similar to many in the general area (Rose, 1966). See West Twin Peak occurrence ARDF number AN096, Highway prospect ARDF number AN095, and Pioneer Creek prospect ARDF number AN094.
Age: Lower to Middle Jurassic
Alteration: Slight serpentinization of olivine.
Commodities (Major) - Cr
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: | AN097 |
|---|
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