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:
Clipper Mills District, Butte Co., California, USA

Oldest recorded age at locality: 204
Youngest recorded age at locality: 204

mindat Locality ID: 245995
mindat URL: http://www.mindat.org/loc-245995.html

Tectonic Settings:

Total number of sublocalities beneath "Clipper Mills District, Butte Co., California, USA": 23
Total number of bottom-level sublocalities: 22

Number of Child Localities: 1
Child Localities:
Clipper Mills

Latitude: 39°32'39"N
Longitude: 121°10'19"W
Decimal Degree (lat, lon): 39.544166666667,-121.17194444444
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: Al Au C Ca Cr Cu Fe H K Mg Mn O S Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleCalciteChalcopyriteClayCopperGarnetMalachiteMicaNoneOlivine
PyriteQuartzRhodoniteRutileSpinelTalc

15 IMA Minerals at location:
Actinolite  (*)Calcite  (*)Chalcopyrite  (*)Chromite  (*)Gold  (*)
Magnetite  (*)Malachite  (*)Muscovite  (*)Pyrite  (*)Pyrolusite  (*)
Quartz  (*)Rhodonite  (*)Spessartine  (*)Talc  (*)Tephroite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)211514433419
Calcite  (*)CalciteCa(CO3)115143827770
Chalcopyrite  (*)ChalcopyriteCuFeS2115143827198
Chromite  (*)SpinelFe2+Cr2O42042044151444,151445,151449,1514533902
Gold  (*)CopperAu115145230554
Magnetite  (*)SpinelFe2+Fe3+2O4115144214899
Malachite  (*)MalachiteCu2(CO3)(OH)2115143812537
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2115145017380
Pyrite  (*)PyriteFeS2115143839462
Pyrolusite  (*)RutileMnO211514513106
Quartz  (*)QuartzSiO23151450,151452,15145861156
Rhodonite  (*)RhodoniteCaMn3Mn(Si5O15)2151438,151440969
Spessartine  (*)GarnetMn2+3Al2(SiO4)311514401214
Talc  (*)Clay TalcMg3Si4O10(OH)211514433337
Tephroite  (*)OlivineMn2+2(SiO4)2151438,151439240


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-00217204204Upper Triassic-Lower Jurassic or older (204±2 Ma U-Pb zircon on leucodiorite)       Cr74095Dickey And Dreisbach Prospect, Clipper Mills, Clipper Mills District, Butte Co., California, USADickey and Dreisbach ProspectMoiser et al. (2012) USGSSIR2012_5157 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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