Last Chance Mine, Nicolls Peak, Weldon District, Piute Mountains, Kern County, California, USAi
| Regional Level Types | |
|---|---|
| Last Chance Mine | Mine |
| Nicolls Peak | Peak |
| Weldon District | Mining District |
| Piute Mountains | Mountain Range |
| Kern County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
35° 36' 36'' North , 118° 17' 26'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Weldon | 2,642 (2011) | 6.2km |
| Squirrel Mountain Valley | 547 (2011) | 10.9km |
| Mountain Mesa | 777 (2011) | 10.9km |
| Onyx | 475 (2011) | 10.9km |
| Lake Isabella | 3,466 (2011) | 16.5km |
A former W-Cu (trace) occurrence/mine located in the SE¼SW¼ sec. 34, T26S, R34E MDM, 1.3 km (0.8 mile) SSE of Nicolls Peak (coordinates of record, along the W canyon wall of Kelso Valley (3¼ miles S of Weldon). Produced during 1954. MRDS database stated accuracy for this location is 500 meters.
Mineralization is hosted in metamorphic rock. The ore body is 91.44 meters long. Associated rocks include quartz monzonite. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Workings include surface and underground openings with a length of 64.01 meters and an overall depth of 30.48 meters and comprised of a 10 foot long trench and a 25 foot vertical shaft. From E to W, a 100 foot shaft is inclined 65 degrees SW, the trench, then a 75 foot deep shaft inclined 80SW, then the 25 foot vertical shaft.
Production data can be found in Troxel and Morton (1962).
A few tons of W ore yielded in 1954. A small tonnage was probably mined previously.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 |
| ⓘ Scheelite Formula: Ca(WO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
| Group 9 - Silicates | |||
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Unclassified | |||
| ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Scheelite | Ca(WO4) |
| O | ⓘ Garnet Group | X3Z2(SiO4)3 |
| Al | Aluminium | |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| Ca | Calcium | |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Scheelite | Ca(WO4) |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| W | Tungsten | |
| W | ⓘ Scheelite | Ca(WO4) |
Other Databases
| Link to USGS MRDS: | 10103235 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Mojave DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060290590
