Grizzley Flat deposit (Sciaroni; Candor; Pierce), Happy Valley, Grizzly Flat Mining District, East Belt, El Dorado County, California, USAi
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Latitude & Longitude (WGS84):
38° 40' North , 120° 34' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Pollock Pines | 6,871 (2017) | 10.7km |
| Camino | 1,750 (2011) | 12.3km |
| River Pines | 379 (2011) | 20.4km |
| Placerville | 10,650 (2017) | 21.3km |
| Diamond Springs | 11,037 (2011) | 21.8km |
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 | 21km |
| Gold Country Treasure Seekers | Placerville, California | 21km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 37km |
A Mo-W occurrence located in sec. 32, T10N, R13E, and in sec. 5, T9N, R13E, MDM, 1.7 km (1.1 miles) S of Happy Valley and 3 miles NW of Grizzly Flat, on National Forest land. MRDS database accuracy for this location is not stated.
The ore body is 9.14 meters thick. The zone is about 1 mile long, 600 feet wide and it consists of layers of garnet-epidote tactite interbedded with quartz-mica schist, quartzite and granite gneiss. Few quartz veins are present. The scheelite horizons range from 5 to 30 feet in width and several hundred feet in length. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Workings include surface and underground openings comprised of open cuts and one adit on the S portion of the deposit.
Production data are found in: Clark, Wm. B. & D.W. Carlson (1956).
No production, but the last owners in 1955 were concentrating small amounts of ore in a small pilot mill and stockpiling the concentrates.
Analytical data results: 1 to 2% WO3.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 |
| ⓘ Molybdenite Formula: MoS2 Description: Occurs as plates. |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Scheelite Formula: Ca(WO4) Description: Occurs in tactite. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Molybdenite | 2.EA.30 | MoS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Scheelite | 7.GA.05 | Ca(WO4) |
| Group 9 - Silicates | |||
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Unclassified | |||
| ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Scheelite | Ca(WO4) |
| O | ⓘ Garnet Group | X3Z2(SiO4)3 |
| Al | Aluminium | |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
| S | Sulfur | |
| S | ⓘ Molybdenite | MoS2 |
| Ca | Calcium | |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Scheelite | Ca(WO4) |
| Fe | Iron | |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
| W | Tungsten | |
| W | ⓘ Scheelite | Ca(WO4) |
Other Databases
| Link to USGS MRDS: | 10008589 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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