Parnell Mine (Cal-Gold Mining Company Mine; Hoffman Mine; Benson Mine), Altaville, Angels Camp Mining District, Calaveras County, California, USAi
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Latitude & Longitude (WGS84):
38° 4' 47'' North , 120° 35' 3'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Angels Camp | 2,677 (2012) | 4.1km |
| Vallecito | 442 (2011) | 9.7km |
| Copperopolis | 3,671 (2011) | 12.1km |
| Murphys | 2,213 (2015) | 12.5km |
| Tuttletown | 668 (2011) | 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 |
|---|---|---|
| Calaveras Gem & Mineral Society | Angels Camp, California | 4km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 40km |
A former Au mine located 2.0 km (1.3 miles) WSW of Altaville (2¼ miles WNW of Angels Camp), N of Negro Hill. Operated during the periods of the pre-1880, 1890's to 1909. MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is a vein deposit hosted in amphibolite, schist, phyllite and slate. The ore body strikes NW and dips 45NE at a width of 19.81 meters. The vein has an amphibolite schist hanging wall and a slate and phyllite footwall, and is said to pass through the Osborn and Parnell properties. Local rocks include undivided pre-Cenozoic metavolcanic rocks, unit 2 (undivided).
Workings include underground openings comprised of an inclined shaft with levels at 100, 200, 300 and 500 feet, with most of the drifting on the 100 and 200 foot levels.
Production data are found in: Clark, Wm. B. & P.A. Lydon (1962).
No production record found.
Analytical data results: 80 feet on the footwall side reported to assay at $15.00 per ton/Au (period values).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10034697 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060091318
