Little Dome Mine (Linda Extension Mine; Little Dome claim), Castle Dome Mine group, Castle Dome Mining District, Castle Dome Mountains, Yuma County, Arizona, USAi
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Latitude & Longitude (WGS84):
33° 1' 57'' North , 114° 10' 9'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Wellton | 2,936 (2017) | 40.0km |
| Tacna | 602 (2011) | 42.3km |
| Buckshot | 153 (2017) | 43.7km |
| Fortuna Foothills | 26,265 (2011) | 47.4km |
| El Prado Estates | 504 (2017) | 49.0km |
A former underground Pb-Ag-F-Ba-V-Mo-Zn-Au-Cu (As-Se-Be-Sb) mine located in SW ¼ sec. 24 & the South-central sec. 36, T4S, R19W (protracted), 4 miles SW of Castle Dome Peak, 0.5 miles S of Castle Dome Mine, and adjoins the Señora Mine on the NE, on federal land. Owned at times, or in part, by Mrs. Eliza De Luce (circa 1933), Mr. Arthur Haack (circa 1930) and Wall.
Mineralization is irregular masses and stringers of partly oxidized, argentiferous galena in a gangue of crystalline fluorite, calcite and gouge, cut by veinlets of crystalline to massive barite, in a lensing vein, two or more feet wide. This vein is along a fault zone cutting steeply-dipping, dense, gray, Mesozoic shale that occupies the northeastern portion of the claim, and a large diorite porphyry dike. The shale and diorite porphyry are cut by small quartz porphyry dikes. The principal vein occurs along a fault zone that strikes N.45º to 55ºW. and dips 85ºSW. The vein splays out to the North and South and the best ore is where the fault is intersected by oblique fractures. A parallel vein, some 10 feet south of the main vein, had been explore dfor a few feet. It showed a maximum width of 2½ feet of crystalline fluorite but very little galena. The surface is covered by a thin veneer of gravel. Ore control was a vein in a shear zone. The best ore occurred where oblique cross fractures intersected the fault zone. Ore concentration was supergene enrichment. Alteration included galena altered to dark anglesite, white cerussite and yellow oxides. An associated rock unit is the Kofa volcanics.
Workings include relatively shallow stoping from shafts. Stopes from 4 to 7 feet wide follow the vein for about 125 feet and to a depth of 20 to 60 feet (18.29 meters). Work occurred intermittently from the 1880's and rich stope fill and dumps were reworked in 1930's and possibly later.
Galena contains 28 to 30 oz/ton Ag; carbonates contain 4 to 6 oz/ton.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Anglesite Formula: PbSO4 Colour: Dark colored. Description: Replacing galena. |
| ⓘ Baryte Formula: BaSO4 Description: As veinlets of crystalline to massive in ore shoots. References: |
| ⓘ Calcite Formula: CaCO3 References: |
| ⓘ Cerussite Formula: PbCO3 Colour: White. Description: Replacing galena. |
| ⓘ Fluorite Formula: CaF2 Description: Crystalline material as a gangue mineral. References: |
| ⓘ Galena Formula: PbS Description: Partly oxidized; as irregular masses and stringers. Averages 28 to 30 oz. Ag/T. References: |
| ⓘ Galena var. Silver-bearing Galena Formula: PbS with Ag Description: Partly oxidized; as irregular masses and stringers. Averages 28 to 30 oz. Ag/T. References: |
| ⓘ Massicot Formula: PbO |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | var. Silver-bearing Galena | 2.CD.10 | PbS with Ag |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Massicot | 4.AC.25 | PbO |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Cerussite | 5.AB.15 | PbCO3 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Anglesite | 7.AD.35 | PbSO4 |
| ⓘ | Baryte | 7.AD.35 | BaSO4 |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Cerussite | PbCO3 |
| O | Oxygen | |
| O | ⓘ Anglesite | PbSO4 |
| O | ⓘ Baryte | BaSO4 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Cerussite | PbCO3 |
| O | ⓘ Massicot | PbO |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Al | Aluminium | |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| S | Sulfur | |
| S | ⓘ Anglesite | PbSO4 |
| S | ⓘ Baryte | BaSO4 |
| S | ⓘ Galena | PbS |
| S | ⓘ Galena var. Silver-bearing Galena | PbS with Ag |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Fluorite | CaF2 |
| Ag | Silver | |
| Ag | ⓘ Galena var. Silver-bearing Galena | PbS with Ag |
| Ba | Barium | |
| Ba | ⓘ Baryte | BaSO4 |
| Pb | Lead | |
| Pb | ⓘ Anglesite | PbSO4 |
| Pb | ⓘ Cerussite | PbCO3 |
| Pb | ⓘ Galena | PbS |
| Pb | ⓘ Massicot | PbO |
| Pb | ⓘ Galena var. Silver-bearing Galena | PbS with Ag |
Other Databases
| Link to USGS MRDS: | 10046347 |
|---|
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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References
(1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. University of Arizona Bulletin 134. Arizona Bureau of Minespages 96, 98-99
