Big Horn Mine [1] (Mabel-Contention; Contention claim; Mabel claim), Hidden Hill, Arrowhead District (Arrow District), San Bernardino County, California, USAi
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Latitude & Longitude (WGS84):
34° 51' 27'' North , 115° 31' 54'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
A former lode Pb-Au-Cu-Ag occurrence/mine located in sec. 20, T9N, R14E, SBM, about 5.3 km NNE of Hidden Hill (23 miles W of Essex), on federal reservation land (Mojave National Preserve/East Mojave National Scenic Area). Operated during the periods 1933, 1938 and 1940 to 1941. MRDS database accuracy for this location is not stated. NOTE: The geographic coordinates provided are from the USGS MRDS database file and correspond to a group of unnamed shafts in sec. 20 on the topo map; however, the topo map labels a solitary shaft in sec. 29, same T&R, as the Big Horn Mine.
Mineralization is a vein deposit hosted in monzonite. The ore body strikes N20E and dips 40-75W at a thickness of 1.22 meters. The formation is principally quartz monzonite, diorite, quartzite and andesite. A series of parallel, intrusive andesite dikes cut quartz monzonite. The dikes have a northerly trend. The vein is 1 to 4 feet thick in an andesite dike in quartz monzonite. Associated rocks include andesite. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Workings include underground openings with a length of 397.76 meters and an overall depth of 99.06 meters. The contention claim has a 3-compartment shaft at 325 feet deep, and with levels at 160 and 300 feet. On the 160 level a drift was driven S for 440 feet to the Subway vein, that strikes N20E and dips 65W, and is 8 to 12 inches (20 to 30 cm) thick. On the 300 level, a drift was driven S 110 feet, and a crosscut was driven NE from the shaft 110 feet, with an additional 100 feet. The Mable claim has a 140 foot shaft with 80 feet of drifts at its bottom. At 40 feet, sulfide ore was encountered.
Production data are found in: Goodwin, Joseph Grant (1957).
A shipment of Pb ore and of Au ore was made in 1940-1941. The Pb ore contained 15.7% Pb with some Cu and Ag.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10102978 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
USA
- California
- San Bernardino County
- Providence MtsMountain Range
- San Bernardino County
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