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Mountain Ranch Mining District, East Belt, Calaveras County, California, USAi
Regional Level Types
Mountain Ranch Mining DistrictMining District
East Belt- not defined -
Calaveras CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
38° 13' 31'' North , 120° 30' 51'' West
Latitude & Longitude (decimal):
38.22528,-120.51417
GeoHash:
G#: 9qf33wsq2
GRN:
N26W68
Type:
Mining District
KΓΆppen climate type:
Csa : Hot-summer Mediterranean climate
Mindat Locality ID:
75660
Long-form identifier:
mindat:1:2:75660:7
GUID (UUID V4):
e0f0a32f-422a-4f50-84f1-467b550a0e2b


Location
This is a small district in central Calaveras County in the vicinity of the town of Mountain Ranch. It includes the Cave City area.

Geology
The district is largely underlain by graphite schist, quartzite, limestone, and thin bodies of mlcose schist. Patches of Tertiary auriferous gravels overlie the bedrock. A few narrow gold-quartz veins, in schist, contain small but sometimes rich ore shoots. The ore contains free gold and abundant sulfides, especially galena.

Mines
Lode: Gaston Hill. Placer: Cotton Flat, Foley, Hidden Cave, Humboldt, Mountain Ranch, Rose Hill.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

17 valid minerals.

Detailed Mineral List:

β“˜ Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
β“˜ Arsenopyrite
Formula: FeAsS
β“˜ 'Asbestos'
β“˜ Calcite
Formula: CaCO3
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ 'Chlorite Group'
Description: Occurs as chlorite schist.
β“˜ Chrysotile
Formula: Mg3(Si2O5)(OH)4
β“˜ Erythrite
Formula: Co3(AsO4)2 · 8H2O
Description: Occurs in small stringers between schist and quartzite.
β“˜ Galena
Formula: PbS
β“˜ Gold
Formula: Au
Localities: Reported from at least 118 localities in this region.
β“˜ Graphite
Formula: C
Description: Occurs in graphitic schist.
β“˜ 'Manganese Oxides'
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Description: Occurs as a component of sericite schist.
β“˜ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
Description: Occurs as a component of sericite schist.
β“˜ 'Psilomelane'
β“˜ Pyrite
Formula: FeS2
Localities: Reported from at least 6 localities in this region.
β“˜ Quartz
Formula: SiO2
Localities: Reported from at least 89 localities in this region.
β“˜ Rhodonite
Formula: CaMn3Mn[Si5O15]
β“˜ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
β“˜ Skutterudite
Formula: CoAs3
Description: Occurs in small stringers between schist and quartzite.
β“˜ Spessartine
Formula: Mn2+3Al2(SiO4)3
β“˜ Sphalerite
Formula: ZnS
β“˜ Talc
Formula: Mg3Si4O10(OH)2
β“˜ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
Colour: Black
Description: Occurs in quartz.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Gold1.AA.05Au
β“˜Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Galena2.CD.10PbS
β“˜Pyrite2.EB.05aFeS2
β“˜Arsenopyrite2.EB.20FeAsS
β“˜Skutterudite2.EC.05CoAs3
Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Erythrite8.CE.40Co3(AsO4)2 Β· 8H2O
Group 9 - Silicates
β“˜Chrysotile9..Mg3(Si2O5)(OH)4
β“˜Spessartine9.AD.25Mn2+3Al2(SiO4)3
β“˜Rhodonite9.DK.05CaMn3Mn[Si5O15]
β“˜Talc9.EC.05Mg3Si4O10(OH)2
β“˜Muscovite
var. Sericite		9.EC.15KAl2(AlSi3O10)(OH)2
β“˜9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
β“˜'Serpentine Subgroup'-D3[Si2O5](OH)4
β“˜'Psilomelane'-
β“˜'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
β“˜'Chlorite Group'-
β“˜'Asbestos'-
β“˜'Manganese Oxides'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ ChrysotileMg3(Si2O5)(OH)4
Hβ“˜ ErythriteCo3(AsO4)2 · 8H2O
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ TalcMg3Si4O10(OH)2
Hβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Hβ“˜ Serpentine SubgroupD3[Si2O5](OH)4
BBoron
Bβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
CCarbon
Cβ“˜ AnkeriteCa(Fe2+,Mg)(CO3)2
Cβ“˜ CalciteCaCO3
Cβ“˜ GraphiteC
OOxygen
Oβ“˜ AnkeriteCa(Fe2+,Mg)(CO3)2
Oβ“˜ CalciteCaCO3
Oβ“˜ ChrysotileMg3(Si2O5)(OH)4
Oβ“˜ ErythriteCo3(AsO4)2 · 8H2O
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ RhodoniteCaMn3Mn[Si5O15]
Oβ“˜ SpessartineMn32+Al2(SiO4)3
Oβ“˜ TalcMg3Si4O10(OH)2
Oβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oβ“˜ Serpentine SubgroupD3[Si2O5](OH)4
MgMagnesium
Mgβ“˜ AnkeriteCa(Fe2+,Mg)(CO3)2
Mgβ“˜ ChrysotileMg3(Si2O5)(OH)4
Mgβ“˜ TalcMg3Si4O10(OH)2
AlAluminium
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ SpessartineMn32+Al2(SiO4)3
Alβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siβ“˜ ChrysotileMg3(Si2O5)(OH)4
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ RhodoniteCaMn3Mn[Si5O15]
Siβ“˜ SpessartineMn32+Al2(SiO4)3
Siβ“˜ TalcMg3Si4O10(OH)2
Siβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siβ“˜ Serpentine SubgroupD3[Si2O5](OH)4
SSulfur
Sβ“˜ ArsenopyriteFeAsS
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ GalenaPbS
Sβ“˜ PyriteFeS2
Sβ“˜ SphaleriteZnS
KPotassium
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ AnkeriteCa(Fe2+,Mg)(CO3)2
Caβ“˜ CalciteCaCO3
Caβ“˜ RhodoniteCaMn3Mn[Si5O15]
MnManganese
Mnβ“˜ RhodoniteCaMn3Mn[Si5O15]
Mnβ“˜ SpessartineMn32+Al2(SiO4)3
FeIron
Feβ“˜ AnkeriteCa(Fe2+,Mg)(CO3)2
Feβ“˜ ArsenopyriteFeAsS
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ PyriteFeS2
CoCobalt
Coβ“˜ ErythriteCo3(AsO4)2 · 8H2O
Coβ“˜ SkutteruditeCoAs3
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
ZnZinc
Znβ“˜ SphaleriteZnS
AsArsenic
Asβ“˜ ArsenopyriteFeAsS
Asβ“˜ ErythriteCo3(AsO4)2 · 8H2O
Asβ“˜ SkutteruditeCoAs3
AuGold
Auβ“˜ GoldAu
PbLead
Pbβ“˜ GalenaPbS

Localities in this Region

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Other Regions, Features and Areas containing this locality

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This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Turner, Henry Ward (1894), Geological atlas, Jackson (California) folio (Folio No. 11): 1-6.
Clark, Lorin D. (1954) Geology and mineral deposits of the Calaveritas quadrangle, Calaveras County, California. Special Report 40. California Division of Mines
Clark, William B., Lydon, Philip A. (1963) Mines and Mineral Resources of Calaveras County, California. County Report 2. California Division of Mines and Geology
Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193: 93-94.
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