Temescal Tin Mine (Cajalco Tin Mine; Temescal Mine; Temescal Tin District), El Cerrito, Riverside County, California, USAi
| Regional Level Types | |
|---|---|
| Temescal Tin Mine (Cajalco Tin Mine; Temescal Mine; Temescal Tin District) | Mine |
| El Cerrito | - not defined - |
| Riverside County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
33° 50' 53'' North , 117° 28' 51'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| El Cerrito Corona | 5,100 (2018) | 4.0km |
| Home Gardens | 11,570 (2011) | 5.0km |
| Corona | 164,226 (2017) | 8.5km |
| Norco | 26,289 (2017) | 11.1km |
| Woodcrest | 14,347 (2011) | 12.0km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| West End Prospectors Corporation | Norco, California | 11km |
| Orange Belt Mineralogical Society | San Bernardino, California | 34km |
| Valley Prospectors, Inc. | San Bernardino, California | 34km |
| Santa Ana Rock & Mineral Club, Inc. | Santa Ana, California | 38km |
| Route 66 Gold Miners Inc | Brea, California | 39km |
Mindat Locality ID:
25165
Long-form identifier:
mindat:1:2:25165:2
GUID (UUID V4):
67fd8c18-a40a-4c0a-9b21-402781c40db3
A former Sn occurrence/mine located in the SW¼W½S½ sec. 2 and in secs. 3, 10 & 11, T4S, R6W, SBM, 4.0 km (2.5 miles) ENE of El Cerrito, W of Lake Mathews, along the SE margin of Eagle Valley, in an unincorporated area, on private property. Property consists of 870 acres in the western part of Rancho el Sobranto de San Jacinto (about 5 miles SE of Corona and 11 miles SW of Riverside) Discovered in 1853. First produced in 1869. MRDS database stated accuracy for this location is 100 meters.
Mineralization is hosted in Late Cretaceous quartz monzonite. The ore body strikes N35E and dips 65N at a thickness of 1 meter, width of 1 meter and a length of 40 meters. Ore body No. 1 is pipe-like and disseminated. Ore body No. 2 is irregular and in a fissure vein. Ore body No. 3 is a replacement body. The primary mode of origin was hydrothermal activity. The secondary mode of origin was contact metasomatism. Primary ore control was fracturing and the secondary control was the contact zone. The deposit is comprised of 65 veins. Tin occurs as cassiterite in black tourmaline veins in coarse-grained hornblende-biotite granite. 65 veins are present but only 10 have been explored. They vary from 1 inch to 15 feet in width, averaging 1 to 2 feet. The general trend is N20 to 50E, dipping 50 to 85 NW. The veins contain quartz also. Most veins are less than 1,000 feet long and discontinuous. The main vein, Cajalco, is over 690 feet in depth. Cajalco is exposed over 550 feet in length, strikes N55E and dips 55 to 80NW, at 1 inch to 5 feet, 10 inches thick. Cassiterite occurs as disseminations, bunches and stringers. The country rock is a quartz monzonite (?). Wallrock alteration is intense (sericitic, silicification and propylitic). Local rocks include Mesozoic granitic rocks, unit 2 (Peninsular Ranges).
Workings include surface and underground openings. Only 10 veins have been explored by tunnels and shafts.
Analytical data results: The ore grade averaged 4.0% Sn oxide, or 0.15% Sn.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
3 valid minerals.
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:
| ⓘ Cassiterite Formula: SnO2 |
| ⓘ Cassiterite var. Wood Tin Formula: SnO2 |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs as an alteration product. |
| ⓘ Quartz Formula: SiO2 |
| ⓘ 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
| ⓘ | var. Wood Tin | 4.DB.05 | SnO2 |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| B | Boron | |
| B | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | Oxygen | |
| O | ⓘ Cassiterite | SnO2 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | ⓘ Cassiterite var. Wood Tin | SnO2 |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| 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 | ⓘ Quartz | SiO2 |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
| Sn | ⓘ Cassiterite var. Wood Tin | SnO2 |
Other Databases
| Link to USGS MRDS: | 10077106 |
|---|
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References
