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Granite Springs Mining District, West Belt, Mariposa County, California, USAi
Regional Level Types
Granite Springs Mining DistrictMining District
West Belt- not defined -
Mariposa CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
37° North , 120° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~12km
GRN:
N25W69
Type:
Mining District
Köppen climate type:
Csa : Hot-summer Mediterranean climate
Mindat Locality ID:
249024
Long-form identifier:
mindat:1:2:249024:6
GUID (UUID V4):
0


Location: This district is in the northwest corner of Mariposa County and the southwest corner of Tuolumne County in the vicinity of Lake McClure and Don Pedro Reservoir. The mines apparently were last worked in the 1930s.

Geology: The region is underlain chiefly by greenstone with some interbeds of graphitic slate. There are a considerable number of northwest-striking gold-quartz veins often associated with diorite dikes. Most of the deposits are relatively shallow.

Mines: Mariposa County: Anita, Burr ($350,000), Florinita, Jackson, White Rock. Tuolumne County: Buzzard Roost, Diamond, Hedley, Oak Mesa, Solambo.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

10 valid minerals.

Detailed Mineral List:

ⓘ Bementite
Formula: Mn7Si6O15(OH)8
ⓘ Calcite
Formula: CaCO3
Description: 20% to 30% Mn.
ⓘ Calcite var. Manganese-bearing Calcite
Formula: (Ca,Mn)CO3
Description: 20% to 30% Mn.
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Hausmannite
Formula: Mn2+Mn3+2O4
ⓘ Native Gold
Formula: Au
ⓘ Piemontite
Formula: (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Description: Occurs as grains in ore.
ⓘ 'Psilomelane'
ⓘ Pyrolusite
Formula: Mn4+O2
ⓘ Quartz
Formula: SiO2
ⓘ Rhodonite
Formula: CaMn3Mn[Si5O15]
ⓘ Tephroite
Formula: Mn2+2SiO4
Description: Occurs as micro-crystals of plumose material.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
ⓘHausmannite4.BB.10Mn2+Mn3+2O4
ⓘQuartz4.DA.05SiO2
ⓘPyrolusite4.DB.05Mn4+O2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘvar. Manganese-bearing Calcite5.AB.05(Ca,Mn)CO3
Group 9 - Silicates
ⓘTephroite9.AC.05Mn2+2SiO4
ⓘPiemontite9.BG.05a(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
ⓘRhodonite9.DK.05CaMn3Mn[Si5O15]
ⓘBementite9.EE.05Mn7Si6O15(OH)8
Unclassified
ⓘ'Psilomelane'-

List of minerals for each chemical element

HHydrogen
Hⓘ BementiteMn7Si6O15(OH)8
Hⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
CCarbon
Cⓘ CalciteCaCO3
Cⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
OOxygen
Oⓘ BementiteMn7Si6O15(OH)8
Oⓘ CalciteCaCO3
Oⓘ HausmanniteMn2+Mn23+O4
Oⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Oⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Oⓘ PyrolusiteMn4+O2
Oⓘ QuartzSiO2
Oⓘ RhodoniteCaMn3Mn[Si5O15]
Oⓘ TephroiteMn22+SiO4
AlAluminium
Alⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
SiSilicon
Siⓘ BementiteMn7Si6O15(OH)8
Siⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Siⓘ QuartzSiO2
Siⓘ RhodoniteCaMn3Mn[Si5O15]
Siⓘ TephroiteMn22+SiO4
SSulfur
Sⓘ ChalcopyriteCuFeS2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Caⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Caⓘ RhodoniteCaMn3Mn[Si5O15]
MnManganese
Mnⓘ BementiteMn7Si6O15(OH)8
Mnⓘ HausmanniteMn2+Mn23+O4
Mnⓘ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Mnⓘ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Mnⓘ PyrolusiteMn4+O2
Mnⓘ RhodoniteCaMn3Mn[Si5O15]
Mnⓘ TephroiteMn22+SiO4
FeIron
Feⓘ ChalcopyriteCuFeS2
CuCopper
Cuⓘ ChalcopyriteCuFeS2
AuGold
Auⓘ Native GoldAu

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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References

Bowen, O.E., Jr. & C.H. Gray, Jr. (1957), Mines and mineral deposits of Mariposa County, California: California Journal of Mines and Geology: 53(1&2): 247.
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