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Dehesa Dumortierite deposit (Lehesa Dumortierite deposit), Alpine, Laguna Mountains, San Diego County, California, USAi
| Regional Level Types | |
|---|---|
| Dehesa Dumortierite deposit (Lehesa Dumortierite deposit) | Deposit |
| Alpine | - not defined - |
| Laguna Mountains | Mountain Range |
| San Diego County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
32° 48' 6'' North , 116° 46' 46'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Alpine | 14,236 (2011) | 3.9km |
| Harbison Canyon | 3,841 (2011) | 5.1km |
| Crest | 2,593 (2011) | 8.3km |
| Granite Hills | 3,035 (2011) | 11.7km |
| Jamul | 6,163 (2011) | 13.1km |
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 |
|---|---|---|
| El Cajon Valley Gem & Mineral Society | El Cajon, California | 17km |
| San Diego Gem and Mineral Society | San Diego, California | 37km |
| San Diego Lapidary Society | San Diego, California | 37km |
| Palomar Gem & Mineral Club | Escondido, California | 45km |
A major dumortierite deposit and former prospect located in the N½NW¼NE¼ sec. 9, T16S, R2E, SBM, about 2.5 miles SSW of Alpine and 200 feet (90 meters) S of the Alpine-Dehesa Road.
Mineralization is a dumortierite pegmatite.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) Description: A minor constituent of dumortierite pegmatite. References: |
| ⓘ Corundum Formula: Al2O3 Description: A microscopic constituent of dumortierite schist. |
| ⓘ Dumortierite Formula: Al(Al2O)(Al2O)2(SiO4)3(BO3) Colour: Violet-red |
| ⓘ 'Hypersthene' Formula: (Mg,Fe)SiO3 Description: A component of orbicular gabbro. References: |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs as pseudomorphs after radiating clusters of dumortierite. |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Rutile Formula: TiO2 Description: Abundant minute crystals scattered through quartz. |
| ⓘ Sillimanite Formula: Al2(SiO4)O Description: A constituent of dumortierite gneiss. References: |
| ⓘ Titanite Formula: CaTi(SiO4)O Description: A minor associate of dumortierite. References: |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Corundum | 4.CB.05 | Al2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Rutile | 4.DB.05 | TiO2 |
| Group 9 - Silicates | |||
| ⓘ | Sillimanite | 9.AF.05 | Al2(SiO4)O |
| ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| ⓘ | Dumortierite | 9.AJ.10 | Al(Al2O)(Al2O)2(SiO4)3(BO3) |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Hypersthene' | - | (Mg,Fe)SiO3 |
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| B | Boron | |
| B | ⓘ Dumortierite | Al(Al2O)(Al2O)2(SiO4)3(BO3) |
| O | Oxygen | |
| O | ⓘ Corundum | Al2O3 |
| O | ⓘ Dumortierite | Al(Al2O)(Al2O)2(SiO4)3(BO3) |
| O | ⓘ Hypersthene | (Mg,Fe)SiO3 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rutile | TiO2 |
| O | ⓘ Sillimanite | Al2(SiO4)O |
| O | ⓘ Titanite | CaTi(SiO4)O |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| F | Fluorine | |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Mg | Magnesium | |
| Mg | ⓘ Hypersthene | (Mg,Fe)SiO3 |
| Al | Aluminium | |
| Al | ⓘ Corundum | Al2O3 |
| Al | ⓘ Dumortierite | Al(Al2O)(Al2O)2(SiO4)3(BO3) |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Sillimanite | Al2(SiO4)O |
| Si | Silicon | |
| Si | ⓘ Dumortierite | Al(Al2O)(Al2O)2(SiO4)3(BO3) |
| Si | ⓘ Hypersthene | (Mg,Fe)SiO3 |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Sillimanite | Al2(SiO4)O |
| Si | ⓘ Titanite | CaTi(SiO4)O |
| P | Phosphorus | |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Titanite | CaTi(SiO4)O |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ti | Titanium | |
| Ti | ⓘ Rutile | TiO2 |
| Ti | ⓘ Titanite | CaTi(SiO4)O |
| Fe | Iron | |
| Fe | ⓘ Hypersthene | (Mg,Fe)SiO3 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America Plate
- Franciscan DomainDomain
- Peninsular Ranges BatholithVolcanic Arc
- Southern California Borderland BasinsBasin
Pacific PlateTectonic Plate
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Dehesa Dumortierite deposit, Alpine, Laguna Mountains, San Diego County, California, USA