Early Bird Mine, Sugarloaf Mountain [3], West Shasta Copper - Zinc Mining District, Klamath Mountains, Shasta County, California, USAi
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Latitude & Longitude (WGS84):
40° 43' North , 122° 31' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| French Gulch | 346 (2011) | 10.4km |
| Keswick | 451 (2011) | 11.3km |
| Central Valley (historical) | 4,340 (2015) | 12.9km |
| Shasta Lake | 10,159 (2017) | 12.9km |
| Shasta | 1,771 (2011) | 13.2km |
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 |
|---|---|---|
| Shasta Gem & Mineral Society | Redding, California | 18km |
Mindat Locality ID:
92580
Long-form identifier:
mindat:1:2:92580:9
GUID (UUID V4):
bbc46181-3b7d-42b9-89bb-ba222b37ae0e
A former Cu-Au-Ag mine located in sec. 11, T33N, R6W, MDM, 3.1 km (2.0 miles) N of Sugarloaf Mountain (coordinates of record), on private land (patented) in a National Forest. Discovered in 1900. The first year of production was 1922. The lessee/operator was Mason Valley Mines Co. (1977, 1926, 1928). The U.S. Smelting, Refining and Mining Co. had an unknown involvement here (1922, 1925). MRDS database stated accuracy for this location is 10 meters.
Mineralization is a sulphide deposit (Deposit model: 184: Massive sulfide, kuroko), hosted in porphyry and rhyolite. The ore body is a replacement deposit, tabular/blanket in form with a thickness of 9.14 meters, a width of 25.91 meters and a length of 140.21 meters (300 meters ?), and with a depth to top of 10 meters. It is hosted in light gray, siliceous rhyolite. The primary mode of origin was hydrothermal and the secondary mode was contact metasomatic. Primary ore control was folding with faulting as the secondary control. There is moderate wallrock alteration (intermediate argillic, sericitic, and pyritization). The ore is largely pyrite with chalcopyrite and sphalerite, which occur interstitial to the pyrite. Local rocks include Paleozoic metavolcanic rocks, unit 1 (Eastern Klamath Mountains).
Local structures include a fault which divides the ore body, South porphyritic rhyolite which is overlain by a flow of non-porphyritic rhyolite.
Workings include underground openings with a length of 246.89 meters.
Production statistics for 1925 (1922-1925): ^10.27 % Cu, 0.015 oz/ton Au, 0.41 oz/ton Ag. For 1928 (1925-1928): ^3.4% Cu, 0.034 oz/ton Au, 2.0 oz/ton Ag.
Ore from 4 drill holes averaged .03 oz/ton Au, 1.53 oz/ton Ag and 3.01% Cu.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β Calcite Formula: CaCO3 |
| β Chalcopyrite Formula: CuFeS2 |
| β Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| β Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 |
| β Pyrite Formula: FeS2 |
| β Quartz Formula: SiO2 |
| β Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Sphalerite | 2.CB.05a | ZnS |
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| β | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| C | Carbon | |
| C | β Calcite | CaCO3 |
| O | Oxygen | |
| O | β Calcite | CaCO3 |
| O | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | β Quartz | SiO2 |
| O | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Al | Aluminium | |
| Al | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | β Quartz | SiO2 |
| Si | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| S | Sulfur | |
| S | β Chalcopyrite | CuFeS2 |
| S | β Pyrite | FeS2 |
| S | β Sphalerite | ZnS |
| K | Potassium | |
| K | β Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | β Calcite | CaCO3 |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | β Sphalerite | ZnS |
Other Databases
| Link to USGS MRDS: | 10116552 |
|---|
Other Regions, Features and Areas containing this locality
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060890477
