Shannon Mine, Mack House, Alleghany Mining District (Forest Mining District), Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| Shannon Mine | Mine |
| Mack House | - not defined - |
| Alleghany Mining District (Forest Mining District) | Mining District |
| Sierra County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 26' 49'' North , 120° 54' 19'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Pike | 134 (2011) | 8.0km |
| Camptonville | 158 (2011) | 12.3km |
| Washington | 185 (2011) | 13.3km |
| Downieville | 282 (2011) | 14.2km |
| North San Juan | 269 (2011) | 19.1km |
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 | 29km |
A former lode Au occurence/mine located in the SW¼ sec. 6, T18N, R10E, MDM, 3.3 km (2.1 miles) WSW of Mack House and about 3 miles WSW of Alleghany, along the W canyon wall of Blue Ravine (S slope of Pliocene Ridge), on National Forest land. MRDS database stated accuracy for this location is 100 meters. Located 4 miles from the intersection of the road to Alleghany and Magnus Orchard Road.
Mineralization is a vein deposit hosted in mafic volcanic rock, ultramafic intrusive rock and serpentinite. The ore body strikes N20E and dips 45S. A quartz vein is hosted in serpentinized mafic & ultramafic rocks. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Workings include surface and underground openings comprised of an adit and several pits.
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: | 10086513 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa 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 #0060910157
