French Creek Mine, Mount Aigare, Shingle Springs Mining District, West Belt, El Dorado County, California, USAi
| Regional Level Types | |
|---|---|
| French Creek Mine | Mine |
| Mount Aigare | Mountain |
| Shingle Springs Mining District | Mining District |
| West Belt | - not defined - |
| El Dorado County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 35' 56'' North , 120° 55' 26'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Shingle Springs | 4,432 (2011) | 7.4km |
| Cameron Park | 18,228 (2011) | 9.5km |
| Deer Park | 1,384 (2018) | 12.7km |
| Diamond Springs | 11,037 (2011) | 14.2km |
| Plymouth | 960 (2017) | 14.7km |
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 | 18km |
| Gold Country Treasure Seekers | Placerville, California | 18km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 25km |
| Roseville Rock Rollers | Roseville, California | 36km |
| Fossils for Fun Society, Inc. | North Highlands, California | 40km |
A former lode Au-Cu occurrence/mine located in the NW¼NW¼ sec. 31, T9N, R10E, MDM, 0.9 km (0.5 mile) SSW of Mount Aigare (coordinates of record) and 1.7 km (1.1 miles) NNE of Brandon Corner, along the E side of French Creek (3½ miles NE of Latrobe; 5½ miles S of Shingle Springs), on private land. Operator Lange, William And Loomis, L W. MRDS database stated accuracy for this location is 500 meters. Probably the workings are some of those shown in the NW¼ of the section on USGS quadrangle Latrobe, California, topo map.
Mineralization is a vein deposit hosted in diabase. The ore body strikes N and dips 65E at a thickness of 6.1 meters and a length of 91.44 meters. This deposit is located in a belt of metavolcanic rocks W of the Mother Lode Gold Belt. The vein has an average thickness of 20 feet. The ore body is dark green, fine- to medium-grained metadiabase, traced for 300 feet. Minor amounts of of chalcopyrite and a trace of arsenopyrite are also present in the ore. Pyrite is disseminated. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains) and/or pre-Cenozoic metasedimentary and metavolcanic rocks undivided.
Workings include underground openings comprised of a 30 foot inclined shaft (early 1956), plus adits. The surface plant included a headframe and milling equipment. Under development since 1953.
No production record was found.
Analytical data results: Assays range from $2.80 to $60 (period values) Au/ton. The estimated average is $20 to $30 (period values).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS Description: Only a trace is present in ore. |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 Description: Disseminated. |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10029893 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060170320
