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:
Sierra City, Sierra City District, Sierra Co., California, USA

Oldest recorded age at locality: 400
Youngest recorded age at locality: 400

mindat Locality ID: 210499
mindat URL: http://www.mindat.org/loc-210499.html

Tectonic Settings:

Total number of sublocalities beneath "Sierra City, Sierra City District, Sierra Co., California, USA": 41
Total number of bottom-level sublocalities: 40

Number of Child Localities: 39
Child Localities:
Antlered Crest Mine
Arkansas Flat Occurrence
Bigelow Mine
Bradly Consolidated Group
Chipps Mine (Swastika)
Commodore Placer
Devine Placer Mine
Dottie Q Mine
Dudley Mine (Dudly)
Euclid Group
Fair Prospect
Gentile Flat Occurrence
Green And Farr Prospect (Green And Fair Prospects; Green Prospect)
Hannix Placer
Hilda Mine
Kentucky Mine (Kentuck Mine)
Klondyke Mine
Lloyd And Milward Occurrence
Middle Yuba River Placer [2]
Milton Chrome Claim
Milton Claim (Redmayne And McGonigal Prospect)
Mountain Mine (Bonanza)
Paterson Placer
Phoenix Mine
Roman Mine
Sacred Mount & Butte Saddle Group (Butte Saddle Group; Sacred Mount Group)
Shamrock Group
Sierra Buttes Mine (Sierra City Mine; Bigelow Mine; Buttes Union Mine; Ariel Independence Mine; Ariel Vein; Whiskey Vein; Smith Vein)
Unidentified Au Mine [13]
Unidentified Au Mine [14]
Unidentified Au Mine [16]
Unidentified Au Occurrence [51]
Unnamed Au Prospect [6]
Unnamed Au Prospect [7]
Unnamed Au Prospect [8]
Unnamed Cr-Au Occurrence [2]
Unnamed Wollastonite Occurrence [1]
Waterfall Placer (Rocky Bar)
William Tell Mine

Latitude: 39°33'53"N
Longitude: 120°37'17"W
Decimal Degree (lat, lon): 39.564722222222,-120.62138888889

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: Au Ca Cr Cu Fe H Mo O Pb S Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ChalcopyriteCopperGarnetMarcasiteMolybdeniteNonePyriteQuartzRocksaltSpinel
Wollastonite

12 IMA Minerals at location:
Chalcopyrite  (*)Chromite  (*)Ferrimolybdite  (*)Galena  (*)Gold  (*)
Marcasite  (*)Molybdenite  (*)Molybdite  (*)Pyrite  (*)Quartz  (*)
Uvarovite  (*)Wollastonite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Chalcopyrite  (*)ChalcopyriteCuFeS2117799027198
Chromite  (*)SpinelFe2+Cr2O440040011779873902
Ferrimolybdite  (*)NoneFe3+2(Mo6+O4)3·7H2O1177996345
Galena  (*)RocksaltPbS117799024243
Gold  (*)CopperAu18177969,177971,177973,177975,177976,177981,177982,177983,177988,177990,177991,177992,177995,177996,177997,177998,177999,17800730554
Marcasite  (*)MarcasiteFeS211779965674
Molybdenite  (*)MolybdeniteMoS211779965800
Molybdite  (*)NoneMoO31177996140
Pyrite  (*)PyriteFeS22177990,17799639462
Quartz  (*)QuartzSiO214177969,177971,177975,177976,177982,177988,177990,177991,177995,177996,177997,177998,177999,17800761156
Uvarovite  (*)GarnetCa3Cr2(SiO4)34004001177987212
Wollastonite  (*)WollastoniteCaSiO311780051247



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
podchrome-00190400400Ordovician-Devonian? (fossils); 1318-561 Ma U-Pb detrital zircon       Cr93430Milton Claim (Redmayne And McGonigal Prospect), Sierra City, Sierra City District, Sierra Co., California, USAMilton ClaimMoiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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