Mammoth Springs Mine (Contact Mine), Alleghany, Alleghany Mining District (Forest Mining District), Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| Mammoth Springs Mine (Contact Mine) | Mine |
| Alleghany | - 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° 29' 7'' North , 120° 49' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Downieville | 282 (2011) | 8.2km |
| Washington | 185 (2011) | 14.2km |
| Pike | 134 (2011) | 15.8km |
| Sierra City | 221 (2011) | 18.5km |
| Camptonville | 158 (2011) | 19.7km |
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 |
|---|---|---|
| Nevada County Gem & Mineral Society | Grass Valley, California | 36km |
Mindat Locality ID:
93409
Long-form identifier:
mindat:1:2:93409:2
GUID (UUID V4):
0ada041f-3c90-45ee-b0de-6a9772cf79be
A former lode Au occurrence/mine located about 2.5 km (about 1¾ miles) NNE of Alleghany, along the E canyon wall of the North Fork Kanaka Creek, E of Pliocene Ridge. MRDS database accuracy for this location is not stated.
Mineralization is a vein deposit hosted in slate, gabbro, and serpentinite. The ore body strikes N05W and dips vertically. The lode follows a fault contact of dark, fissile slate against gabbro and serpentine. The dark slate contains up to 6 inches (15 cm) thick beds of light gary, sandy slate. The slate is crushed and sheared close to the contact, although nearby, the only alteration effect is the presence of pyrite flakes on cleavage surfaces. The strike is N20W and the dip is 80W. Gabbro is altered, irregularly, to crushed talcose material with carbonate lenses. Veinlets of cross-fiber amphibolite asbestos at one spot, 6 inches (15 cm) in maximum width, are crossed by irregular quartz stringers and the amphibolite is replaced by quartz. Quartz is almost completely lacking. Au was said to have been found in thin flakes on cleavage surfaces of dark slate. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).
Workings include underground openings comprised of 2 adits (lower = about 750 feet; upper = 150 feet).
Production was probably small . No other production record was found.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Amphibole Asbestos' |
| ⓘ Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
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 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Amphibole Asbestos' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Databases
| Link to USGS MRDS: | 10103098 |
|---|
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References
