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Latitude & Longitude (WGS84):
38° 7' 27'' North , 120° 29' 21'' West
Latitude & Longitude (decimal):
Type:
Nearest Settlements:
PlacePopulationDistance
Murphys2,213 (2015)2.9km
Vallecito442 (2011)4.0km
Angels Camp2,677 (2012)7.6km
Forest Meadows1,249 (2015)8.7km
Mountain Ranch1,628 (2011)12.4km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Calaveras Gem & Mineral SocietyAngels Camp, California8km
Amador County Gem & Mineral SocietySutter Creek, California40km
Mindat Locality ID:
75010
Long-form identifier:
mindat:1:2:75010:8
GUID (UUID V4):
0


A Mn occurrence located in the SE¼ sec. 12, T3N, R13E, MDM, 0.7 km (0.5 mile) ENE of La Honda Park, along Angels Creek, and 2½ miles W of Murphys. Discovered in 1917. Owned by George Carley, California (1974). MRDS database stated accuracy for this location is 1,000 meters.

The ore body strikes N65W and dips 65NE at a thickness of 1.37 meters and a length of 4.57 meters. A bed of massive metachert contains Mn oxides and partially oxidized reddish-brown Mn garnet. It is 1 to 4.5 feet thick and is exposed for a length of 15 feet. It lies in sericite schist of the Calaveras Formation. The Mn oxide is low-grade, consisting mainly of psilomelane, with cores and patches of limonite and much silica. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).

Workings include surface and underground openings. A pit was dug during WWI at 5 feet diameter and 3 feet deep. A tunnel was more recently started below the pit but was not driven far enough to strike the ore bed.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


2 valid minerals.

Detailed Mineral List:

ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Description: Occurs as a sericite schist surrounding the chert enclosing the ore body.
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
Description: Occurs as a sericite schist surrounding the chert enclosing the ore body.
ⓘ 'Psilomelane'
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Psilomelane'-

List of minerals for each chemical element

HHydrogen
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
OOxygen
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
AlAluminium
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
MnManganese
Mnⓘ SpessartineMn32+Al2(SiO4)3

Other Databases

Link to USGS MRDS:10029050

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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