Eagle's Head deposit, Rancheria, Volcano, Volcano Mining District, Amador County, California, USAi
Regional Level Types | |
---|---|
Eagle's Head deposit | Deposit |
Rancheria | - not defined - |
Volcano | Town |
Volcano Mining District | Mining District |
Amador County | County |
California | State |
USA | Country |
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Latitude & Longitude (WGS84):
38° 29' 29'' North , 120° 39' 34'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Volcano | 115 (2017) | 5.9km |
Fiddletown | 235 (2011) | 8.5km |
Pine Grove | 2,219 (2011) | 8.7km |
River Pines | 379 (2011) | 9.6km |
Red Corral | 1,413 (2017) | 10.0km |
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 |
---|---|---|
Amador County Gem & Mineral Society | Sutter Creek, California | 17km |
El Dorado County Mineral and Gem Society | Placerville, California | 29km |
Gold Country Treasure Seekers | Placerville, California | 29km |
Calaveras Gem & Mineral Society | Angels Camp, California | 48km |
Mindat Locality ID:
73593
Long-form identifier:
mindat:1:2:73593:2
GUID (UUID V4):
4afdb6de-1344-43a9-8819-a0fc1f60ca16
A former Au-Mn deposit/hydraulic Au mine located in the N½ sec. 4, T7N, R12E, MDM, 5.1 km (3.2 miles) NE of Racheria, on the divide between the Deadman Fork Dry Creek and the South Fork Deadman Creek (6.6 miles by road ESE of Fiddletown). Discovered in 1941 (Mn). Owned by the state of California. MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is a residual Mn deposit hosted in andesite, sedimentary breccia, rhyolite and tuff. Also, this property was formerly a placer Au occurrence. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).
The deposit is a concentration of 10% grade Mn ocide (mainly psilomelane), in lateritic soils, beneath a Tertiary lava cap. Rhyolite tuff and clay are at the base of the lava cap, and below this is a deep regolithic breccia or residual soil. The Mn oxides occur as coatings, patches and cement mixed with clay. Lateritic soil, the same as Big Gulch, is nearby, and contains hematite, limonite and anauxite.
Assays are said to run over 40% Mn, but while this might be true of an individual small specimen, the material in sight would probably run less than 10% Mn. No solid bed of Mn ore was seen and the deposit is superficial.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
ⓘ Hematite Formula: Fe2O3 |
ⓘ Kaolinite Formula: Al2(Si2O5)(OH)4 |
ⓘ 'Limonite' |
ⓘ 'Psilomelane' |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
ⓘ | Hematite | 4.CB.05 | Fe2O3 |
Group 9 - Silicates | |||
ⓘ | Kaolinite | 9.ED.05 | Al2(Si2O5)(OH)4 |
Unclassified | |||
ⓘ | 'Limonite' | - | |
ⓘ | 'Psilomelane' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
O | Oxygen | |
O | ⓘ Hematite | Fe2O3 |
O | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
Al | Aluminium | |
Al | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
Si | Silicon | |
Si | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
Fe | Iron | |
Fe | ⓘ Hematite | Fe2O3 |
Other Databases
Link to USGS MRDS: | 10109108 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060050365