Bruce Mine (Bruce group; Bruce prospect), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USAi
| Regional Level Types | |
|---|---|
| Bruce Mine (Bruce group; Bruce prospect) | Mine |
| Darwin | - not defined - |
| Darwin Mining District | Mining District |
| Darwin Hills | Group of Hills |
| Inyo County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
36° 16' 55'' North , 117° 34' 56'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
78590
Long-form identifier:
mindat:1:2:78590:0
GUID (UUID V4):
7ff0fc41-59db-47b9-bf51-fb72939fcaff
A former W mine located in SWΒΌ sec. 18, T19S, R41E, MDM, 5830 feet N28Β°E of Darwin (1.7 km (1.1 miles) NNE), at 4,850 feet of altitude. The mine is owned by The Anaconda Company and was leased to A. J. Pouch and "Frenchie" Lingsley of Darwin in 1955. The MRDS database stated accuracy for this locality is 100 meters. A steep jeep track leads from the N. Main Street to the mine. Updated description and position of the mine N36.28216 W117.58246 by Richard Muster, based on observations in 2007. It is argued by some that the Wonder mine and the Bruce mine are one unit but Hall, Wayne Everett & E.M. Mackevett list them as separate mines.
A W deposit hosted in calc-hornfels and tactite. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
The workings include surface and underground openings comprised of 2 adits, about 80 and 100 feet long, and an open cut 50 feet long, 10 feet wide, and about 15 feet deep.
Scheelite was first described in the Darwin Hills by Hess and Larsen (1922, p268). Kelley (1938, p543) mentioned Scheelite at the Bruce mine in the Darwin Hills, but the Tungsten deposits in the Darwin Hills remained undeveloped until 1940 when Tungsten was in high demand because of WW II.
Assay results: 2.25% W, 1% Cu and traces of Mo were reported.
Mine dump at: N36.28116 W117.58068
Workings also at: N36.28154 W117.58234 and N36.28185 W117.58237.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β Calcite Formula: CaCO3 |
| β Chalcopyrite Formula: CuFeS2 |
| β Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| β Cuprite Formula: Cu2O |
| β Fluorite Formula: CaF2 |
| β 'Garnet Group' Formula: X3Z2(SiO4)3 |
| β 'Limonite' |
| β Malachite Formula: Cu2(CO3)(OH)2 |
| β Pyrite Formula: FeS2 |
| β Scheelite Formula: Ca(WO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| β | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Cuprite | 4.AA.10 | Cu2O |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Scheelite | 7.GA.05 | Ca(WO4) |
| Group 9 - Silicates | |||
| β | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 Β· nH2O, x < 1 |
| Unclassified | |||
| β | 'Limonite' | - | |
| β | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | β Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | β Calcite | CaCO3 |
| C | β Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | β Calcite | CaCO3 |
| O | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | β Cuprite | Cu2O |
| O | β Malachite | Cu2(CO3)(OH)2 |
| O | β Scheelite | Ca(WO4) |
| O | β Garnet Group | X3Z2(SiO4)3 |
| F | Fluorine | |
| F | β Fluorite | CaF2 |
| Al | Aluminium | |
| Al | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | Silicon | |
| Si | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | β Garnet Group | X3Z2(SiO4)3 |
| S | Sulfur | |
| S | β Chalcopyrite | CuFeS2 |
| S | β Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | β Calcite | CaCO3 |
| Ca | β Fluorite | CaF2 |
| Ca | β Scheelite | Ca(WO4) |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
| Cu | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | β Cuprite | Cu2O |
| Cu | β Malachite | Cu2(CO3)(OH)2 |
| W | Tungsten | |
| W | β Scheelite | Ca(WO4) |
Other Databases
| Link to USGS MRDS: | 10139372 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Antler Foreland BasinBasin
- Basin and Range BasinsBasin
- Mojave DomainDomain
USA
- Sierra NevadaMountain Range
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References
