Kenton Mine (Kenton Annex; King Solomon Mine), Mack House, Alleghany Mining District (Forest Mining District), Sierra County, California, USAi
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Latitude & Longitude (WGS84):
39° 27' 17'' North , 120° 51' 29'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Washington | 185 (2011) | 11.7km |
| Downieville | 282 (2011) | 11.9km |
| Pike | 134 (2011) | 12.1km |
| Camptonville | 158 (2011) | 16.4km |
| Sierra City | 221 (2011) | 22.8km |
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 | 31km |
A former lode Au-Cu-Ag occurrence/mine located in sec. 4, T18N, R10E, MDM, 0.9 km (0.6 mile) E of Mack House and 2.2 km (7,100 feet) SW of Alleghany, on National Forest land. MRDS database stated accuracy for this location is 1,000 meters. No significant production since 1892, although it was reopened several times since then.
Mineralization is a vein deposit hosted in gabbro and serpentine. The ore body strikes N25E and dips 45E at a thickness of 3.05 meters. The vein's N attitude given above. To the S it swings nearly parallel to the serpentine contact, or N30W. The dip varies from 25 to 80 W. Quartz is absent in places, or becomes small, irregular stringers along repeatedly sheared walls. Later shearing has crushed the quartz, or brecciated it. This was followed by quartz cement. There is also a breccia of partially silicified gabbro. Shearing varies in intensity. In one place, little gouge & a few feet away. (USGS MRDS grammar) Much evidence of reverse left lateral movement. Post-mineralization shears are steeper & cut the vein irregularly. The vein lies entirely in gabbro. High-grade ore is associated with coarse arsenopyrite. Gold is associated with area of post-first-quartz shearing. Local alteration includes carbonitization. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Workings include underground openings with an overall depth of 82.3 meters and comprised of 3 adits. The upper 2 adits are caved.
A conservative estimate gave $90,000 (period values) of total production.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ 'Wad' |
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Wad' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Pyrite | FeS2 |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Databases
| Link to USGS MRDS: | 10086512 |
|---|
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 #0060910141 & 0060910142
Kenton Mine, Mack House, Alleghany Mining District, Sierra County, California, USA