Calaveras-Columbus Mine (Columbus; Amador-Columbus), West Point, West Point Mining District, East Belt, Calaveras County, California, USAi
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Latitude & Longitude (WGS84):
38° 24' 50'' North , 120° 34' 2'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Pioneer | 1,094 (2011) | 2.0km |
| Red Corral | 1,413 (2017) | 3.3km |
| West Point | 674 (2011) | 3.8km |
| Buckhorn | 2,429 (2017) | 5.4km |
| Volcano | 115 (2017) | 6.4km |
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 |
|---|---|---|
| Amador County Gem & Mineral Society | Sutter Creek, California | 21km |
| Calaveras Gem & Mineral Society | Angels Camp, California | 38km |
| El Dorado County Mineral and Gem Society | Placerville, California | 40km |
| Gold Country Treasure Seekers | Placerville, California | 40km |
A former lode Au-Ag-Cu mine located in the center S½ sec. 32, T7N, R13E, MDM, about 4 km (2.5 miles) WNW of West Point, along the North Fork Mokelumne River. Operated 1892 to 1910, 1921 to 1927, and 1932 to 1935. MRDS database stated accuracy for this location is 500 meters.
Mineralization is a vein deposit hosted in granodiorite. The ore body strikes N and dips 70W at a thickness of 1.52 meters. The vein is 2 to 5 feet thick. Some ore is high-grade. Abundant sulfides are present. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Workings include underground openings comprised of a 500 foot crosscut eastward adit to the vein with a 400 foot N drift and 400 foot S drift. There is also a 90 foot deep winze on the N drift with a 50 foot N drift and 150 foot S drift off of it.
Production data are found in: Clark, Wm. B. & P.A. Lydon (1962).
No production record found.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ 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 | |||
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| 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 | ⓘ Pyrrhotite | Fe1-xS |
| Fe | Iron | |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10102802 |
|---|
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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