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Pyramid Mine (Gold Reserve Mine), Rescue area, Deer Valley Mining District, West Belt, El Dorado County, California, USAi
| Regional Level Types | |
|---|---|
| Pyramid Mine (Gold Reserve Mine) | Mine |
| Rescue area | Area |
| Deer Valley Mining District | Mining District |
| West Belt | - not defined - |
| El Dorado County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 43' 34'' North , 120° 56' 27'' West
Latitude & Longitude (decimal):
Type:
Kรถppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Cold Springs | 446 (2011) | 6.4km |
| Shingle Springs | 4,432 (2011) | 6.8km |
| Cameron Park | 18,228 (2011) | 7.5km |
| Coloma | 529 (2011) | 9.3km |
| Deer Park | 1,384 (2018) | 11.3km |
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 Dorado County Mineral and Gem Society | Placerville, California | 12km |
| Gold Country Treasure Seekers | Placerville, California | 12km |
| Roseville Rock Rollers | Roseville, California | 30km |
| Fossils for Fun Society, Inc. | North Highlands, California | 38km |
| Sacramento Valley Detecting Buffs | North Highlands, California | 38km |
A former lode Au-Pb-Cu occurrence/mine located in secs. 12 & 13, T10N, R9E, MDM, 1.8 km (1.1 mile/6,100 feet) NNE of Rescue and 4ยผ miles N of Shingle Springs, on private land. Not operated between the 1890's and 1933. Subsequently, several concerns did total production given from personal communication. MRDS database stated accuracy for this location is 100 meters.
Mineralization is a vein deposit hosted in serpentinite, gabbro, amphibolite, schist and norite. The ore body strikes NW and dips 50E at a thickness of 6.1 meters. The main quartz vein is from a few inches to 20 feet thick in the West Gold Belt. Amphibolite schist country rock lies between gabbro-diorite to the W and serpentine to the E. The ore shoot is 500 feet wide. The quartz mass originally outcropped 25 feet in air, where several veins united. The Au is partially free and partially in sulfides. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include underground openings comprised of 2 drift adits, each 500 feet long, plus a 50 foot shaft (?) and a 818 foot inclined shaft.
Production data are found in: Clark and Carlson (1956).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| โ Ankerite Formula: Ca(Fe2+,Mg)(CO3)2 |
| โ Chalcopyrite Formula: CuFeS2 |
| โ Galena Formula: PbS |
| โ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Colour: Green Description: Occurs as green flakes. |
| โ Muscovite var. Mariposite Formula: K(Al,Cr)2(Al,Si)4O10(OH)2 Colour: Green Description: Occurs as green flakes. |
| โ Muscovite var. Phengite Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 Colour: Green Description: Occurs as green flakes. |
| โ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| โ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| โ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| โ | Galena | 2.CD.10 | PbS |
| Group 5 - Nitrates and Carbonates | |||
| โ | Ankerite | 5.AB.10 | Ca(Fe2+,Mg)(CO3)2 |
| Group 9 - Silicates | |||
| โ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| โ | var. Phengite | 9.EC.15 | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| โ | var. Mariposite | 9.EC.15 | K(Al,Cr)2(Al,Si)4O10(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | โ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| H | โ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| C | Carbon | |
| C | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| O | Oxygen | |
| O | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| O | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | โ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| O | โ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Mg | Magnesium | |
| Mg | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Mg | โ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Al | Aluminium | |
| Al | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | โ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Al | โ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Si | Silicon | |
| Si | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | โ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Si | โ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| S | Sulfur | |
| S | โ Chalcopyrite | CuFeS2 |
| S | โ Galena | PbS |
| K | Potassium | |
| K | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | โ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| K | โ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Ca | Calcium | |
| Ca | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Cr | Chromium | |
| Cr | โ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Fe | Iron | |
| Fe | โ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Fe | โ Chalcopyrite | CuFeS2 |
| Fe | โ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Cu | Copper | |
| Cu | โ Chalcopyrite | CuFeS2 |
| Au | Gold | |
| Au | โ Native Gold | Au |
| Pb | Lead | |
| Pb | โ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10006834 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060170105
