Mugwump Mine (Young America Mine; Diamond Peak Mine), Alleghany, Alleghany Mining District (Forest Mining District), Sierra County, California, USAi
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Latitude & Longitude (WGS84):
39° 28' 21'' North , 120° 51' 41'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Downieville | 282 (2011) | 10.1km |
| Pike | 134 (2011) | 12.3km |
| Washington | 185 (2011) | 13.7km |
| Camptonville | 158 (2011) | 16.2km |
| Sierra City | 221 (2011) | 22.1km |
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 | 33km |
Mindat Locality ID:
93460
Long-form identifier:
mindat:1:2:93460:3
GUID (UUID V4):
f90417f2-fc7d-4759-ab94-adb05f37cfb8
A former lode Au occurrence/mine located in secs. 28 & 33, T19N, R10E, MDM, about 1.6 km (1.0 mile) W of Alleghany, on the S slope of Pliocene Ridge, W of Wet Ravine. MRDS database accuracy for this location is not stated. Property was purchased in 1893 for $13,500.
Mineralization is a vein deposit hosted in greenstone and Late Permian slate. The ore body strikes N and dips W at a thickness of 1.22 meters. Both vein walls are tuffaceous slate and may be displaced 100 feet by a northerly fault, though it may be displaced to the N on a reverse fault. The footwall is black conglomeritic slate in the S part of the tunnel. The hanging wall is a dense, green, supposedly altered tuff, 1 inch (2.5 cm) to 3 feet (0.91 meter) thick, with gouge. At the S end of the quartz the strike changes, dip flattens, and the quartz reaches a maximum thickness of 4 feet. The tuffs, or effusives, are altered to white clay in the upper level, but dark slates are easily recognizable. Surface gray clay retains a schistose structure. Au is associated with coarse arsenopyrite. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).
Workings include surface & underground openings with an overall depth of 38.1 meters and comprised of a 3,000 foot adit with 1,300 feet of drifts on several levels.
Production data are found in: MacBoyle, Errol (1920b).
Major production occurred before 1893. The tailings dump was reported to contain 50,000 to 60,000 tons of material at $1.50 to $2.50 (period values) Au/ton.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS Description: Coarse material. |
| ⓘ Gold Formula: Au |
| ⓘ 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 | |||
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| 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 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Databases
| Link to USGS MRDS: | 10034799 |
|---|
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References
