Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
Ophir District (Auburn District; Duncan Hill District), Placer Co., California, USA

Oldest recorded age at locality: 132
Youngest recorded age at locality: 132

mindat Locality ID: 209241
mindat URL: http://www.mindat.org/loc-209241.html

Tectonic Settings:

Total number of sublocalities beneath "Ophir District (Auburn District; Duncan Hill District), Placer Co., California, USA": 115
Total number of bottom-level sublocalities: 107

Number of Child Localities: 5
Child Localities:
Auburn
Elders Corner
Gold Hill
Newcastle
Ophir

Latitude: 38°54'15"N
Longitude: 121°7'24"W
Decimal Degree (lat, lon): 38.904166666667,-121.12333333333
AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Ag Al As Au C Ca Cr Cu Fe H K Mg Mn Mo O Pb S Sb Si Zn 

Elements from minerals reported directly at this locality: As C Ca Fe O S 

Structural Groups for minerals in this locality: 
AcanthiteArsenopyriteCalciteChalcopyriteChloriteClayCopperGarnetMalachiteMarcasite
MicaMolybdeniteNonePyriteQuartzRocksaltSphaleriteSpinelStibniteTetrahedrite

23 IMA Minerals at location:
Acanthite  (*)Arsenopyrite  (*)Calcite  (*)Chalcopyrite  (*)Chromite  (*)
Clinochlore  (*)Copper  (*)Galena  (*)Gold  (*)Hausmannite  (*)
Kalinite  (*)Malachite  (*)Marcasite  (*)Molybdenite  (*)Muscovite  (*)
Pyrargyrite  (*)Pyrite  (*)Quartz  (*)Silver  (*)Sphalerite  (*)
Stibnite  (*)Tetrahedrite-(Zn)  (*)Uvarovite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Acanthite  (*)AcanthiteAg2S11675232793
Arsenopyrite  (*)ArsenopyriteFeAsS13213209052
Calcite  (*)CalciteCa(CO3)132132027770
Chalcopyrite  (*)ChalcopyriteCuFeS21321329167497,167501,167506,167519,167523,167530,167578,167590,16759527198
Chromite  (*)SpinelFe2+Cr2O411675653902
Clinochlore  (*)Chlorite ClayMg5Al(AlSi3O10)(OH)811675651756
Copper  (*)CopperCu11675913846
Galena  (*)RocksaltPbS17167499,167503,167507,167509,167518,167519,167523,167530,167532,167533,167572,167578,167583,167588,167595,167598,16760924243
Gold  (*)CopperAu78167497,167499,167500,167503,167504,167505,167506,167507,167508,167509,167510,167511,167512,167513,167514,167515,167516,167517,167518,167519,167520,167521,167523,167524,167525,167527,167528,167530,167532,167533,167535,167540,167541,167542,167545,167546,167553,167554,167555,167557,167559,167560,167562,167566,167567,167569,167571,167572,167574,167575,167576,167577,167578,167579,167580,167582,167583,167584,167586,167587,167588,167589,167591,167592,167595,167596,167597,167598,167599,167600,167602,167603,167604,167605,167607,167608,167609,16761030554
Hausmannite  (*)SpinelMn2+Mn3+2O41321321167496350
Kalinite  (*)NoneKAl(SO4)2·11H2O132132116749654
Malachite  (*)MalachiteCu2(CO3)(OH)21321322167501,16759012537
Marcasite  (*)MarcasiteFeS211675955674
Molybdenite  (*)MolybdeniteMoS211675115800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2116753017380
Pyrargyrite  (*)NoneAg3SbS311675531425
Pyrite  (*)PyriteFeS213213222167500,167501,167503,167506,167517,167519,167523,167528,167530,167533,167546,167574,167575,167578,167584,167588,167590,167591,167595,167605,167608,16760939462
Quartz  (*)QuartzSiO213213267167497,167499,167501,167503,167505,167506,167507,167508,167509,167510,167511,167512,167513,167514,167515,167516,167517,167518,167519,167521,167523,167528,167530,167531,167532,167533,167535,167540,167542,167545,167546,167554,167555,167557,167559,167560,167569,167571,167572,167575,167576,167577,167578,167580,167582,167583,167584,167586,167587,167588,167589,167591,167592,167595,167596,167597,167598,167599,167600,167602,167603,167604,167605,167607,167608,167609,16761061156
Silver  (*)CopperAg2167500,1675915186
Sphalerite  (*)SphaleriteZnS5167519,167522,167523,167591,16759521482
Stibnite  (*)StibniteSb2S311676093418
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S135167511,167520,167574,167579,1675915317
Uvarovite  (*)GarnetCa3Cr2(SiO4)31167565212


1 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
USGS-Rb-Sr-05952132132132Rb-Srage not evaluatedwhole rock     85233Davenport Mine, Auburn, Ophir District (Auburn District; Duncan Hill District), Placer Co., California, USA USGS-Rb-Sr USGS-Rb-Sr 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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