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Auburn, Ophir Mining District (Auburn Mining District; Duncan Hill Mining District), Placer Co., California, USAi
Regional Level Types
Auburn- not defined -
Ophir Mining District (Auburn Mining District; Duncan Hill Mining District)Mining District
Placer Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
38° 53' 48'' North , 121° 4' 37'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Auburn13,953 (2017)0.0km
North Auburn13,022 (2011)3.9km
Newcastle1,224 (2011)5.5km
Cool4,100 (2017)5.5km
Penryn831 (2011)9.4km


A populated place (city).

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana 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

14 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: Logan, Clarence August (1936), Gold mines of Placer County: California Journal of Mines and Geology, California Division Mines (Report 32): 32(1): 11, 22; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 108.
Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 6 localities in this region.
'Electrum'
Formula: (Au, Ag)
Reference: Lindgren, Waldemar (1894a), The gold-silver veins of Ophir, California: UGS 14th. Ann. Report, part 2: 205; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 205; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 27.
Galena
Formula: PbS
Localities: Reported from at least 10 localities in this region.
Gold
Formula: Au
Localities: Reported from at least 31 localities in this region.
Hausmannite
Formula: Mn2+Mn3+2O4
Reference: Fairbanks, Harold W. (1890), Geology of the Mother Lode region: California Mining Bureau. Report 10: 47; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 215.
Kalinite
Formula: KAl(SO4)2 · 11H2O
Description: Occurs in slates.
Reference: Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp.: 68; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 293.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Mariposite'
Formula: K(Al,Cr)2(Al,Si)4O10(OH)2
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 256.
Molybdenite
Formula: MoS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 256.
Muscovite var: Phengite
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 256.
Pyrite
Formula: FeS2
Localities: Reported from at least 10 localities in this region.
Quartz
Formula: SiO2
Localities: Reported from at least 27 localities in this region.
Silver
Formula: Ag
Reference: Lindgren, Waldemar (1894a), The gold-silver veins of Ophir, California: USGS 14th. Annual Report, part 2: 264, 272; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 339; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 46.
Sphalerite
Formula: ZnS
Tetrahedrite
Formula: Cu6Cu4(Fe2+,Zn)2Sb4S12S

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Electrum'1.AA.05(Au, Ag)
Gold1.AA.05Au
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Acanthite2.BA.35Ag2S
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Tetrahedrite2.GB.05Cu6Cu4(Fe2+,Zn)2Sb4S12S
Group 4 - Oxides and Hydroxides
Hausmannite4.BB.10Mn2+Mn3+2O4
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Kalinite7.CC.15KAl(SO4)2 · 11H2O
Group 9 - Silicates
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Phengite9.EC.15KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Mariposite'-K(Al,Cr)2(Al,Si)4O10(OH)2

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
3 <ø < 4
Tetrahedrite3.3.6.1Cu6Cu4(Fe2+,Zn)2Sb4S12S
Group 7 - MULTIPLE OXIDES
AB2X4
Hausmannite7.2.7.1Mn2+Mn3+2O4
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AB(XO4)2·xH2O
Kalinite29.5.4.2KAl(SO4)2 · 11H2O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Electrum'-(Au, Ag)
'Mariposite'-K(Al,Cr)2(Al,Si)4O10(OH)2
Muscovite
var: Phengite
-KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2

List of minerals for each chemical element

HHydrogen
H MalachiteCu2(CO3)(OH)2
H MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
H KaliniteKAl(SO4)2 · 11H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CCarbon
C MalachiteCu2(CO3)(OH)2
OOxygen
O QuartzSiO2
O MalachiteCu2(CO3)(OH)2
O MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
O HausmanniteMn2+Mn23+O4
O KaliniteKAl(SO4)2 · 11H2O
O MuscoviteKAl2(AlSi3O10)(OH)2
O Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
MgMagnesium
Mg Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
AlAluminium
Al MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
Al KaliniteKAl(SO4)2 · 11H2O
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
SiSilicon
Si QuartzSiO2
Si MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
SSulfur
S SphaleriteZnS
S ChalcopyriteCuFeS2
S PyriteFeS2
S GalenaPbS
S AcanthiteAg2S
S MolybdeniteMoS2
S TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
S KaliniteKAl(SO4)2 · 11H2O
KPotassium
K MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
K KaliniteKAl(SO4)2 · 11H2O
K MuscoviteKAl2(AlSi3O10)(OH)2
K Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CrChromium
Cr MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
MnManganese
Mn HausmanniteMn2+Mn23+O4
FeIron
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
Fe Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
Cu TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
ZnZinc
Zn SphaleriteZnS
Zn TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
MoMolybdenum
Mo MolybdeniteMoS2
AgSilver
Ag Electrum(Au, Ag)
Ag SilverAg
Ag AcanthiteAg2S
SbAntimony
Sb TetrahedriteCu6Cu4(Fe2+,Zn)2Sb4S12S
AuGold
Au Electrum(Au, Ag)
Au GoldAu
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp. (includes catalog of minerals of California pp. 63-410), and miscellaneous observations on mineral products): 68.
Fairbanks, Harold W. (1890), Geology of the Mother Lode region: California Mining Bureau. Report 10: 47.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 215, 293.

Localities in this Region


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