Ophir Mine, 16 to 1 Mine (Sixteen-to-One Mine; Original Sixteen-to-One Mine), Alleghany, Alleghany Mining District (Forest Mining District), Sierra County, California, USAi
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Latitude & Longitude (WGS84):
39° 27' 26'' North , 120° 51' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Downieville | 282 (2011) | 11.6km |
| Washington | 185 (2011) | 11.9km |
| Pike | 134 (2011) | 12.3km |
| Camptonville | 158 (2011) | 16.5km |
| Sierra City | 221 (2011) | 22.6km |
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 |
|---|---|---|
| Nevada County Gem & Mineral Society | Grass Valley, California | 32km |
A former lode Au occurrence/mine located in the SE¼ (estimated) sec. 34, T19N, R10E, MDM, about 2.2 km SSW of Alleghany, along the S canyon wall of Kanake Creek, on National Forest land. MRDS database accuracy for this location is not stated. This claim/mine was acquired by, and incorporated into, the Sixteen-to-One Mine ownership during the 1920's.
Mineralization is a vein deposit hosted in Late Permian schist and serpentinite. The ore body strikes N62W and dips 60NE at a thickness of 1.52 meters. The vein occurs on a normal fault, on the hanging wall from the Sixteen-to-One vein. The Ophir vein veers sharply towards parallelism. There is also minor thrusting here. Quartz is discontinuous. At one place it is absent for 300 feet along the fault. The quartz reappears near the N shaft. There are 2 branch veins that don't seem to continue far from the main vein. Local rocks include Mesozoic gabbroic rocks, unit 2 (undivided).
Workings include underground openings comprised of 2 adits and 2 shafts from the lowest adit. The extent of the lowest workings is unknown but several thousand feet of drifts exist at the least.
Production data are found in: Ferguson, Henry G. & R.W. Gannett (1932).
No other production record was found.
Practically all production came from the region of the bend in the vein.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
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 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10034803 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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