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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
KΓΆppen climate type:
Csa : Hot-summer Mediterranean climate
Mindat Locality ID:
249024
Long-form identifier:
mindat:1:2:249024:6
GUID (UUID V4):
d2e2b72c-f8d3-4190-87ce-1bb5f658de69


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:

β“˜ Bementite
Formula: Mn7Si6O15(OH)8
β“˜ Calcite
Formula: CaCO3
Description: 20% to 30% Mn.
β“˜ Calcite var. Manganese-bearing Calcite
Formula: (Ca,Mn)CO3
Description: 20% to 30% Mn.
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ Gold
Formula: Au
β“˜ Hausmannite
Formula: Mn2+Mn3+2O4
β“˜ Piemontite
Formula: (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Description: Occurs as grains in ore.
β“˜ 'Psilomelane'
β“˜ Pyrolusite
Formula: Mn4+O2
β“˜ Quartz
Formula: SiO2
β“˜ Rhodonite
Formula: CaMn3Mn[Si5O15]
β“˜ 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
β“˜Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
β“˜Chalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
β“˜Hausmannite4.BB.10Mn2+Mn3+2O4
β“˜Quartz4.DA.05SiO2
β“˜Pyrolusite4.DB.05Mn4+O2
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜var. Manganese-bearing Calcite5.AB.05(Ca,Mn)CO3
Group 9 - Silicates
β“˜Tephroite9.AC.05Mn2+2SiO4
β“˜Piemontite9.BG.05a(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
β“˜Rhodonite9.DK.05CaMn3Mn[Si5O15]
β“˜Bementite9.EE.05Mn7Si6O15(OH)8
Unclassified
β“˜'Psilomelane'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ BementiteMn7Si6O15(OH)8
Hβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
CCarbon
Cβ“˜ CalciteCaCO3
Cβ“˜ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
OOxygen
Oβ“˜ BementiteMn7Si6O15(OH)8
Oβ“˜ CalciteCaCO3
Oβ“˜ HausmanniteMn2+Mn23+O4
Oβ“˜ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Oβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Oβ“˜ PyrolusiteMn4+O2
Oβ“˜ QuartzSiO2
Oβ“˜ RhodoniteCaMn3Mn[Si5O15]
Oβ“˜ TephroiteMn22+SiO4
AlAluminium
Alβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
SiSilicon
Siβ“˜ BementiteMn7Si6O15(OH)8
Siβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Siβ“˜ QuartzSiO2
Siβ“˜ RhodoniteCaMn3Mn[Si5O15]
Siβ“˜ TephroiteMn22+SiO4
SSulfur
Sβ“˜ ChalcopyriteCuFeS2
CaCalcium
Caβ“˜ CalciteCaCO3
Caβ“˜ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Caβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Caβ“˜ RhodoniteCaMn3Mn[Si5O15]
MnManganese
Mnβ“˜ BementiteMn7Si6O15(OH)8
Mnβ“˜ HausmanniteMn2+Mn23+O4
Mnβ“˜ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Mnβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Mnβ“˜ PyrolusiteMn4+O2
Mnβ“˜ RhodoniteCaMn3Mn[Si5O15]
Mnβ“˜ TephroiteMn22+SiO4
FeIron
Feβ“˜ ChalcopyriteCuFeS2
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
AuGold
Auβ“˜ GoldAu

Localities in this Region

USA
USA

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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

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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