Finan Mine (F and F group; Fainine; Finane Mine), Old Mountain House, Alleghany Mining District (Forest Mining District), Sierra County, California, USAi
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Latitude & Longitude (WGS84):
39° 29' 12'' North , 120° 53' 18'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Downieville | 282 (2011) | 9.6km |
| Pike | 134 (2011) | 10.8km |
| Camptonville | 158 (2011) | 14.3km |
| Washington | 185 (2011) | 16.1km |
| North San Juan | 269 (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 | 33km |
A former lode Au-Cr mine located in the W½ (?) (estimated) sec. 29 & E½ sec. 30 (?) (estimated), T19N, R10E, MDM, 1.5 km (1.0 mile) S of Old Mountain House, E of Brush Creek and W of Mountain House Road (about 2½ miles NW of Alleghany; 2¼ miles W of Forest), on National Forest land. MRDS database stated accuracy for this location is 500 meters.
Mineralization is a chromite lens hosted in serpentine and slate and a vein deposit. The ore body dips SW. The vein lies along the same zone of slate-serpentine contact as the Kate HArdy and Brush Creek Mines. The serpentine cuts the slate sharply in places and there is a crushed zone in places. Thus it is thought that the slate yielded unevenly to pressures exerted during serpentinization. Quartz occurs in discontinuous stringers, sometimes following slaty cleavage, sometimes cutting across it and introduced after slate crushing, since the stringers are unbroken. Au also present. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains) and/or Paleozoic marine rocks, undivided, unit 6 (Northwestern Sierra Nevada) and/or Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).
Workings include surface and underground openings comprised of 2 adits on opposite sides of a small tributary to Brush Creek.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Databases
| Link to USGS MRDS: | 10086530 |
|---|
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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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060910242
