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East Belt, Tuolumne County, California, USAi
Regional Level Types
East Belt- not defined -
Tuolumne CountyCounty
CaliforniaState
USACountry

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PhotosMapsSearch
04294300014946380867655.jpg
New Albany mine

United Mines group, Soulsbyville, Soulsbyville & Confidence Mining District, East Belt, Tuolumne County, California, USA
04830260014946381002150.jpg
Soulsby Mine (1907 or earlier)

Soulsby Mine, Soulsbyville, Soulsbyville & Confidence Mining District, East Belt, Tuolumne County, California, USA
06478470014947875924783.png
Ford Mine

Hudson and Calhoun Mine, Sawmill Flat, Columbia, Columbia Mining District, East Belt, Tuolumne County, California, USA
06901540014946324843770.jpg
New Albany mine

United Mines group, Soulsbyville, Soulsbyville & Confidence Mining District, East Belt, Tuolumne County, California, USA
04989220014946324883441.jpg
Soulsby Mine (1907 or earlier)

Soulsby Mine, Soulsbyville, Soulsbyville & Confidence Mining District, East Belt, Tuolumne County, California, USA
06478470014947875924783.png
Ford Mine

Hudson and Calhoun Mine, Sawmill Flat, Columbia, Columbia Mining District, East Belt, Tuolumne County, California, USA
06901540014946324843770.jpg
New Albany mine

United Mines group, Soulsbyville, Soulsbyville & Confidence Mining District, East Belt, Tuolumne County, California, USA
04989220014946324883441.jpg
Soulsby Mine (1907 or earlier)

Soulsby Mine, Soulsbyville, Soulsbyville & Confidence Mining District, East Belt, Tuolumne County, California, USA
Latitude & Longitude (WGS84):
38° 2' 16'' North , 120° 15' 45'' West
Latitude & Longitude (decimal):
38.03778,-120.26250
GeoHash:
G#: 9qf2rked0
GRN:
N26W68
KΓΆppen climate type:
Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Twain Harte2,226 (2011)2.6km
Cedar Ridge1,132 (2011)3.4km
Mono Vista3,127 (2011)4.5km
Phoenix Lake4,269 (2017)5.3km
Soulsbyville2,215 (2011)5.9km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Calaveras Gem & Mineral SocietyAngels Camp, California24km
Mindat Locality ID:
97705
Long-form identifier:
mindat:1:2:97705:1
GUID (UUID V4):
2d4a858d-bdd6-4118-a33d-2b17da6af71e


Long being designated as a gold producing region located in the granitic rocks of the Sierra Nevada of California, the East belt is situated to
02505260014962519201205.jpg
Map of California gold belts
the east of the famous Mother lode Belt and spans several counties and approx. 120 miles, bounded by Mariposa county to the south and Placer county to the north. The East Belt mines are well known for producing abundant high grade pockets.

The East Belt is dominantly argillite, phyllite and phyllonite, chert, and metavolcanic rocks of Paleozoic-Mesozoic age. Carbonate rocks (marble) are also present locally. The phyllite and phyllonite are dark to silvery gray. The chert is mostly thin-bedded with phyllite partings. The Upper Paleozoic-Lower Mesozoic metasedimentary and metavolcanic rocks of the East Belt have been assigned to the Calaveras Complex by most investigators (Earhart, 1988). The Lower Paleozoic metamorphic rocks farther east have been assigned to the Shoo Fly Complex. More recently, some geologists have reinterpreted some assemblages along and immediately east of the Melones Fault Zone as separate Jurassic units (Schweickert and others, 1999). The metamorphic complexes are intruded in places by Mesozoic plutonic rocks. Lode deposits of the East Belt consist of many individual gold-bearing quartz veins enclosed in metamorphic rocks of possible Jurassic age, metamorphic rocks of the Calaveras Complex, metamorphic rocks of the Shoo Fly complex, or in granitic rocks. Most of the veins trend northward and dip steeply. An east-west set of intersecting faults may be a controlling factor in controlling deposition of ore. Ore deposits of the East Belt are smaller and narrower than those of the Mother Lode, but commonly are more chemically complex, and richer in grade. Gold is usually associated with appreciable amounts of pyrite, chalcopyrite, pyrrhotite, galena, sphalerite, and arsenopyrite.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

33 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

β“˜ Altaite
Formula: PbTe
Description: Crystallized altaite and gold in parallel groupings.
β“˜ Aragonite ?
Formula: CaCO3
Description: A reported occurrence.
β“˜ Arsenopyrite
Formula: FeAsS
β“˜ Calcite
Formula: CaCO3
Fluorescence: Scarlet triboluminescence.
β“˜ Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 8 localities in this region.
β“˜ Copper
Formula: Cu
β“˜ Covellite
Formula: CuS
β“˜ Diopside
Formula: CaMgSi2O6
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜ Forsterite
Formula: Mg2SiO4
Description: Formed from serpentinite in intensely sheared zones of the large ultramafic complex (metamorphic Fo98).
β“˜ Galena
Formula: PbS
Localities: Reported from at least 27 localities in this region.
β“˜ 'Garnet Group'
Formula: X3Z2(SiO4)3
β“˜ Gold
Formula: Au
Localities: Reported from at least 196 localities in this region.
Description: A beautiful specimen was found in loose quartz crystals and talc. It measured 6 x 13 inches (15 x 32.5 cm) and weighed 67 Troy ounces (1946).
β“˜ Graphite
Formula: C
β“˜ Hessite
Formula: Ag2Te
β“˜ Kyanite
Formula: Al2(SiO4)O
β“˜ 'Manganese Oxides'
β“˜ Marcasite
Formula: FeS2
Localities: Reported from at least 6 localities in this region.
β“˜ 'Mica Group'
β“˜ Opal
Formula: SiO2 · nH2O
β“˜ Petzite
Formula: Ag3AuTe2
β“˜ 'Psilomelane'
β“˜ Pyrite
Formula: FeS2
Localities: Reported from at least 25 localities in this region.
β“˜ Pyrolusite
Formula: Mn4+O2
β“˜ Pyrrhotite
Formula: Fe1-xS
Localities: Reported from at least 9 localities in this region.
β“˜ Quartz
Formula: SiO2
Localities: Reported from at least 41 localities in this region.
β“˜ Quartz var. Rock Crystal
Formula: SiO2
β“˜ Rhodonite
Formula: CaMn3Mn[Si5O15]
Localities: Reported from at least 6 localities in this region.
β“˜ Scheelite
Formula: Ca(WO4)
β“˜ Spessartine
Formula: Mn2+3Al2(SiO4)3
β“˜ Sphalerite
Formula: ZnS
Localities: Reported from at least 16 localities in this region.
β“˜ Stibnite
Formula: Sb2S3
β“˜ Sylvanite
Formula: AgAuTe4
β“˜ Talc
Formula: Mg3Si4O10(OH)2
β“˜ Tetradymite
Formula: Bi2Te2S
β“˜ Tin ?
Formula: Sn
β“˜ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2
Habit: Fibrous
Colour: White
Description: Occurs in marble.
β“˜ Uraninite
Formula: UO2

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Copper1.AA.05Cu
β“˜Gold1.AA.05Au
β“˜Graphite1.CB.05aC
β“˜Tin ?1.AC.10Sn
Group 2 - Sulphides and Sulfosalts
β“˜Altaite2.CD.10PbTe
β“˜Arsenopyrite2.EB.20FeAsS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Covellite2.CA.05aCuS
β“˜Galena2.CD.10PbS
β“˜Hessite2.BA.60Ag2Te
β“˜Marcasite2.EB.10aFeS2
β“˜Petzite2.BA.75Ag3AuTe2
β“˜Pyrite2.EB.05aFeS2
β“˜Pyrrhotite2.CC.10Fe1-xS
β“˜Sphalerite2.CB.05aZnS
β“˜Stibnite2.DB.05Sb2S3
β“˜Sylvanite2.EA.05AgAuTe4
β“˜Tetradymite2.DC.05Bi2Te2S
Group 4 - Oxides and Hydroxides
β“˜Opal4.DA.10SiO2 Β· nH2O
β“˜Pyrolusite4.DB.05Mn4+O2
β“˜Quartz4.DA.05SiO2
β“˜var. Rock Crystal4.DA.05SiO2
β“˜Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
β“˜Aragonite ?5.AB.15CaCO3
β“˜Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
β“˜Diopside9.DA.15CaMgSi2O6
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Forsterite9.AC.05Mg2SiO4
β“˜Kyanite9.AF.15Al2(SiO4)O
β“˜Rhodonite9.DK.05CaMn3Mn[Si5O15]
β“˜Spessartine9.AD.25Mn2+3Al2(SiO4)3
β“˜Talc9.EC.05Mg3Si4O10(OH)2
β“˜Tremolite9.DE.10β—»Ca2Mg5(Si8O22)(OH)2
Unclassified Minerals, Rocks, etc.
β“˜'Garnet Group'-X3Z2(SiO4)3
β“˜'Manganese Oxides'-
β“˜'Mica Group'-
β“˜'Psilomelane'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hβ“˜ TalcMg3Si4O10(OH)2
Hβ“˜ OpalSiO2 · nH2O
CCarbon
Cβ“˜ CalciteCaCO3
Cβ“˜ GraphiteC
Cβ“˜ AragoniteCaCO3
OOxygen
Oβ“˜ QuartzSiO2
Oβ“˜ RhodoniteCaMn3Mn[Si5O15]
Oβ“˜ PyrolusiteMn4+O2
Oβ“˜ ScheeliteCa(WO4)
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ Garnet GroupX3Z2(SiO4)3
Oβ“˜ SpessartineMn32+Al2(SiO4)3
Oβ“˜ UraniniteUO2
Oβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oβ“˜ CalciteCaCO3
Oβ“˜ Quartz var. Rock CrystalSiO2
Oβ“˜ TalcMg3Si4O10(OH)2
Oβ“˜ ForsteriteMg2SiO4
Oβ“˜ DiopsideCaMgSi2O6
Oβ“˜ KyaniteAl2(SiO4)O
Oβ“˜ OpalSiO2 · nH2O
Oβ“˜ AragoniteCaCO3
MgMagnesium
Mgβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mgβ“˜ TalcMg3Si4O10(OH)2
Mgβ“˜ ForsteriteMg2SiO4
Mgβ“˜ DiopsideCaMgSi2O6
AlAluminium
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ SpessartineMn32+Al2(SiO4)3
Alβ“˜ KyaniteAl2(SiO4)O
SiSilicon
Siβ“˜ QuartzSiO2
Siβ“˜ RhodoniteCaMn3Mn[Si5O15]
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ Garnet GroupX3Z2(SiO4)3
Siβ“˜ SpessartineMn32+Al2(SiO4)3
Siβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siβ“˜ Quartz var. Rock CrystalSiO2
Siβ“˜ TalcMg3Si4O10(OH)2
Siβ“˜ ForsteriteMg2SiO4
Siβ“˜ DiopsideCaMgSi2O6
Siβ“˜ KyaniteAl2(SiO4)O
Siβ“˜ OpalSiO2 · nH2O
SSulfur
Sβ“˜ TetradymiteBi2Te2S
Sβ“˜ SphaleriteZnS
Sβ“˜ PyriteFeS2
Sβ“˜ GalenaPbS
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ MarcasiteFeS2
Sβ“˜ PyrrhotiteFe1-xS
Sβ“˜ StibniteSb2S3
Sβ“˜ CovelliteCuS
Sβ“˜ ArsenopyriteFeAsS
CaCalcium
Caβ“˜ RhodoniteCaMn3Mn[Si5O15]
Caβ“˜ ScheeliteCa(WO4)
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caβ“˜ CalciteCaCO3
Caβ“˜ DiopsideCaMgSi2O6
Caβ“˜ AragoniteCaCO3
MnManganese
Mnβ“˜ RhodoniteCaMn3Mn[Si5O15]
Mnβ“˜ PyrolusiteMn4+O2
Mnβ“˜ SpessartineMn32+Al2(SiO4)3
FeIron
Feβ“˜ PyriteFeS2
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ MarcasiteFeS2
Feβ“˜ PyrrhotiteFe1-xS
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ ArsenopyriteFeAsS
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ CopperCu
Cuβ“˜ CovelliteCuS
ZnZinc
Znβ“˜ SphaleriteZnS
AsArsenic
Asβ“˜ ArsenopyriteFeAsS
AgSilver
Agβ“˜ PetziteAg3AuTe2
Agβ“˜ SylvaniteAgAuTe4
Agβ“˜ HessiteAg2Te
SnTin
Snβ“˜ TinSn
SbAntimony
Sbβ“˜ StibniteSb2S3
TeTellurium
Teβ“˜ TetradymiteBi2Te2S
Teβ“˜ PetziteAg3AuTe2
Teβ“˜ SylvaniteAgAuTe4
Teβ“˜ AltaitePbTe
Teβ“˜ HessiteAg2Te
WTungsten
Wβ“˜ ScheeliteCa(WO4)
AuGold
Auβ“˜ GoldAu
Auβ“˜ PetziteAg3AuTe2
Auβ“˜ SylvaniteAgAuTe4
PbLead
Pbβ“˜ GalenaPbS
Pbβ“˜ AltaitePbTe
BiBismuth
Biβ“˜ TetradymiteBi2Te2S
UUranium
Uβ“˜ UraniniteUO2

Other Databases

Link to USGS MRDS:10310603

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

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

www.westernmininghistory.com (n.d.) http://www.westernmininghistory.com/articles/200/page1/
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
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