Evening Star Mine group, Kofa Butte, Kofa Mining District, Yuma County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Evening Star Mine group | - not defined - |
| Kofa Butte | Table/Butte |
| Kofa Mining District | Mining District |
| Yuma County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
33° 17' 16'' North , 113° 58' 45'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| La Paz Valley | 699 (2011) | 40.3km |
| Brenda | 676 (2011) | 43.7km |
| Quartzsite | 3,626 (2017) | 47.8km |
| Vicksburg | 597 (2011) | 55.0km |
| Salome | 1,530 (2011) | 64.4km |
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 |
|---|---|---|
| Quartzsite Roadrunners Gem & Mineral Club | Quartzsite, Arizona | 48km |
A former Au-Ag-Fe-W mine located in the NE¼ sec. 2, T2S, R17W, on federal land. Owned and operated by Linder & Findley of Arizona (1910).
Mineralization is spotty, weak and irregular, fine-grained gold with sparse scheelite grains in a quartz-iron oxide gangue along fissures and fractures in metamorphic Mesozoic schist and shale cut by rhyolite and pegmatitic dikes.
Workings include a shaft(s) and tunnel operations. Mined mainly in the early 1900's for gold, and later prospected for tungsten. There was a small production of gold ore.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au Description: Spotty, weak & irregular, fine-grained. |
| ⓘ Scheelite Formula: Ca(WO4) Description: Sparse. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| 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) |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10137658 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
USA
- Arizona
- Kofa National Wildlife RefugeWildlife Refuge
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