Economic Mine (Cuneo Mine), Esmeralda, Murphys Mining District (Esmeralda Mining District; Sperry Mining District), East Belt, Calaveras County, California, USAi
| Regional Level Types | |
|---|---|
| Economic Mine (Cuneo Mine) | Mine |
| Esmeralda | - not defined - |
| Murphys Mining District (Esmeralda Mining District; Sperry Mining District) | Mining District |
| East Belt | - not defined - |
| Calaveras County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 9' 39'' North , 120° 32' 29'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Murphys | 2,213 (2015) | 7.5km |
| Mountain Ranch | 1,628 (2011) | 7.5km |
| Vallecito | 442 (2011) | 9.8km |
| Angels Camp | 2,677 (2012) | 10.3km |
| Forest Meadows | 1,249 (2015) | 11.8km |
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 |
|---|---|---|
| Calaveras Gem & Mineral Society | Angels Camp, California | 10km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 34km |
A former Au mine located in the NE¼ sec. 33 and in the NW¼ sec. 34, T4N, R13E, MDM, 0.7 km (0.5 mile) NW of Esmeralda (S side of San Antonio Creek; 1 mile S of Fricot School Ranch). Operated prior to the 1880's and during the period 1910 to 1918. Some surface prospecting done since 1918. MRDS database stated accuracy for this location is 100 or 1,000 meters (2 MRDS files).
Mineralization is a vein deposit hosted in slate and mica schist. The ore body strikes W and dips 75N at a thickness of 1.83 meters. Situated on the central; vein of the Esmeralda vein system. Abundant sulfides and leaf gold found in considerable amounts in high-grade ore in the upper portion of the deposit. Numerous bodies of talcose schist occur in the country rock. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings comprised of a 700 foot SE-trending crosscut adit to the vein, then almost 1,000 feet of drifts extended to the E & W. Several levels and sub-levels were developed.
No production record found.
Reserve/resource data are found in: Clark, Wm. B. & P.A. Lydon (1962).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au Description: Leaf gold abundant in the upper portion of the deposit. |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Talc Formula: Mg3Si4O10(OH)2 Description: Occurs as numerous bodies of talcose schist in the country rock. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Talc | Mg3Si4O10(OH)2 |
| O | Oxygen | |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Talc | Mg3Si4O10(OH)2 |
| Mg | Magnesium | |
| Mg | ⓘ Talc | Mg3Si4O10(OH)2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Talc | Mg3Si4O10(OH)2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10102753 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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