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Eagle's Head deposit, Rancheria, Volcano, Volcano Mining District, Amador County, California, USAi
Regional Level Types
Eagle's Head depositDeposit
Rancheria- not defined -
VolcanoTown
Volcano Mining DistrictMining District
Amador CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
38° 29' 29'' North , 120° 39' 34'' West
Latitude & Longitude (decimal):
Type:
Nearest Settlements:
PlacePopulationDistance
Volcano115 (2017)5.9km
Fiddletown235 (2011)8.5km
Pine Grove2,219 (2011)8.7km
River Pines379 (2011)9.6km
Red Corral1,413 (2017)10.0km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Amador County Gem & Mineral SocietySutter Creek, California17km
El Dorado County Mineral and Gem SocietyPlacerville, California29km
Gold Country Treasure SeekersPlacerville, California29km
Calaveras Gem & Mineral SocietyAngels Camp, California48km
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 Elements

Mineral List


2 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Group 9 - Silicates
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Unclassified
'Limonite'-
'Psilomelane'-

List of minerals for each chemical element

HHydrogen
H KaoliniteAl2(Si2O5)(OH)4
OOxygen
O HematiteFe2O3
O KaoliniteAl2(Si2O5)(OH)4
AlAluminium
Al KaoliniteAl2(Si2O5)(OH)4
SiSilicon
Si KaoliniteAl2(Si2O5)(OH)4
FeIron
Fe HematiteFe2O3

Other Databases

Link to USGS MRDS:10109108

Other Regions, Features and Areas containing this locality


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References

 
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