White Christmas Mine (Bronko claims; Gray Bank), Boulder Park, Imperial County, California, USAi
| Regional Level Types | |
|---|---|
| White Christmas Mine (Bronko claims; Gray Bank) | Mine |
| Boulder Park | Park |
| Imperial County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
32° 42' 42'' North , 116° 1' 46'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Ocotillo | 266 (2011) | 4.5km |
| Jacumba Hot Springs | 561 (2014) | 18.3km |
| Ejido Jacumé | 290 (2013) | 20.2km |
| Rumorosa | 1,836 (2018) | 21.0km |
| Boulevard | 315 (2011) | 23.4km |
A former diatomite-silica deposit/mine located in the NE¼ sec. 11, T17S, R9E, SBM, 8.9 km (5.5 miles) NE of Boulder Park (3 miles SE of Ocotillo; just outside of the Jacumba Wilderness Study Area), on Bureau of Land Management administered land. MRDS database stated accuracy for this location is 10 meters. First claimed in 1941.
Mineralization is a diatomite deposit (Deposit model: 222: Lacustrine diatomite), hosted in Holocene lake sediments and volcanic ash. The ore body is 0.3 meter thick atb a width of 18.29 meters and a length of 60.96 meters. Diatomite beds rest on older alluvium, including fanglomerate and montmorillonite clay, and overlain by unconsolidated sand. The diatomite beds are up to 12 feet thick and flat-lying and exposed in 2 erosional remnants. The northern exposure is 150 feet long and up to 60 feet wide. The southern exposure is 200 feet long and up to 50 feet wide. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 6 (Jacumba).
Workings include surface openings comprised of pits and trenches.
Reserve-Resource data are found in: Todd and others (1987).
Reserves and resources data: Type: In-situ (estimate year = 1987): Total resources: 40,000,000 metric tons of ore. Silica: SiO2: 79.5 weight percent.
Analytical data results: Samples assay as high as 83.62% SiO2. Found in a 7 foot channel. Sample taken from the southern exposure. High content of sand, silt and broken tests.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
1 valid mineral.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Montmorillonite Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Montmorillonite | 9.EC.40 | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| O | Oxygen | |
| O | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Na | Sodium | |
| Na | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Mg | Magnesium | |
| Mg | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Al | Aluminium | |
| Al | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Si | Silicon | |
| Si | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
| Ca | Calcium | |
| Ca | ⓘ Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
Other Databases
| Link to USGS MRDS: | 10023472 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
- Sonoran DesertDesert
North America Plate
- Franciscan DomainDomain
- Peninsular Ranges BatholithVolcanic Arc
- Southern California Borderland BasinsBasin
Pacific PlateTectonic Plate
USA
- California
- Jacumba MountainsMountain Range
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