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Coarsegold Mining District, Madera County, California, USAi
Regional Level Types
Coarsegold Mining DistrictMining District
Madera CountyCounty
CaliforniaState
USACountry

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PhotosMapsSearch
03699780017272294215026.jpg
Axinite-(Fe), etc.

Coarsegold, Coarsegold Mining District, Madera County, California, USA
03699780017272294215026.jpg
Axinite-(Fe), etc.

Coarsegold, Coarsegold Mining District, Madera County, California, USA
03699780017272294215026.jpg
Axinite-(Fe), etc.

Coarsegold, Coarsegold Mining District, Madera County, California, USA
Latitude & Longitude (WGS84):
37° North , 119° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~81km
GRN:
N25W69
Type:
Mining District
Köppen climate type:
Csa : Hot-summer Mediterranean climate
Mindat Locality ID:
249028
Long-form identifier:
mindat:1:2:249028:4
GUID (UUID V4):
0


Location: This district is in east-central Madera County in the vicinity of the town of Coarsegold about 30 miles northeast of Madera. It is in the central portion of a 20-mile long belt that extends from Grub Gulch on the northwest to Fine Gold on the southeast. It includes part of the area once known as the Potter Ridge district. Coarse and heavy placer gold was recovered from shallow deposits during the gold rush. Lode mining began in 1853, when the Texas Flat mine was discovered. The district has been intermittently mined and prospected ever since.

Geology: The area is underlain by medium to coarse-grained granodiorite with some narrow belts of slate and schist. A number of north-trending quartz veins that contain free gold and varying amounts of sulfides are enclosed in both the metamorphic and grantic rocks. The veins were mined to depths of 1000 feet.

Mines: Baker, Balfron, Daisy Bell, Five Oaks, Golden Road, Melvin, Morning Star, New Citizen, Texas Flat.

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

12 valid minerals.

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘ 'Axinite Group'
Colour: Violet
Description: Occurs as large crystals, some of gem quality, with accessory titanite.
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ Gold
Formula: Au
Localities: Reported from at least 35 localities in this region.
ⓘ 'Manganese Oxides'
ⓘ Manganite
Formula: Mn3+O(OH)
ⓘ 'Psilomelane'
ⓘ Pyrolusite
Formula: Mn4+O2
ⓘ Quartz
Formula: SiO2
Localities: Reported from at least 30 localities in this region.
ⓘ Rhodochrosite
Formula: MnCO3
ⓘ Rhodonite
Formula: CaMn3Mn[Si5O15]
ⓘ Scheelite
Formula: Ca(WO4)
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
ⓘ Talc
Formula: Mg3Si4O10(OH)2
Description: Vein filling material.
ⓘ Titanite
Formula: CaTi(SiO4)O

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘGold1.AA.05Au
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
ⓘPyrolusite4.DB.05Mn4+O2
ⓘManganite4.FD.15Mn3+O(OH)
Group 5 - Nitrates and Carbonates
ⓘRhodochrosite5.AB.05MnCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘScheelite7.GA.05Ca(WO4)
Group 9 - Silicates
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘRhodonite9.DK.05CaMn3Mn[Si5O15]
ⓘTalc9.EC.05Mg3Si4O10(OH)2
Unclassified
ⓘ'Psilomelane'-
ⓘ'Manganese Oxides'-
ⓘ'Axinite Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ ManganiteMn3+O(OH)
Hⓘ TalcMg3Si4O10(OH)2
CCarbon
Cⓘ RhodochrositeMnCO3
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ ManganiteMn3+O(OH)
Oⓘ PyrolusiteMn4+O2
Oⓘ QuartzSiO2
Oⓘ RhodochrositeMnCO3
Oⓘ RhodoniteCaMn3Mn[Si5O15]
Oⓘ ScheeliteCa(WO4)
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ TitaniteCaTi(SiO4)O
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ TalcMg3Si4O10(OH)2
AlAluminium
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ SpessartineMn32+Al2(SiO4)3
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ QuartzSiO2
Siⓘ RhodoniteCaMn3Mn[Si5O15]
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ TitaniteCaTi(SiO4)O
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ RhodoniteCaMn3Mn[Si5O15]
Caⓘ ScheeliteCa(WO4)
Caⓘ TitaniteCaTi(SiO4)O
TiTitanium
Tiⓘ TitaniteCaTi(SiO4)O
MnManganese
Mnⓘ ManganiteMn3+O(OH)
Mnⓘ PyrolusiteMn4+O2
Mnⓘ RhodochrositeMnCO3
Mnⓘ RhodoniteCaMn3Mn[Si5O15]
Mnⓘ SpessartineMn32+Al2(SiO4)3
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
WTungsten
Wⓘ ScheeliteCa(WO4)
AuGold
Auⓘ GoldAu

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
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

Irelan, William, Jr. (1888b), Eighth annual report of the State Mineralogist [includes mineral resources of the State, with contributions by W.A. Goodyear, H.A. Whiting, and Stephen Bowers]: California Mining Bureau. (Report 8), 946 pp.: 212-213.
McLaughlin, R.P. & Walter W. Bradley (1916), Madera County, California: California Bureau of Mines Report 14: 551.
Laizure, Clyde McK (1928), Mariposa, Madera Counties: California Journal of Mines and Geology, California Mining Bureau (Report 24): 24(2): 324-328.
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