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:
East Segment Mother Lode, Mother Lode Belt, El Dorado Co., California, USA

Oldest recorded age at locality: 388
Youngest recorded age at locality: 388

mindat Locality ID: 264129
mindat URL: http://www.mindat.org/loc-264129.html

Tectonic Settings:

Total number of sublocalities beneath "East Segment Mother Lode, Mother Lode Belt, El Dorado Co., California, USA": 90
Total number of bottom-level sublocalities: 82

Number of Child Localities: 1
Child Localities:
Georgetown District

Latitude: 38°53'51"N
Longitude: 120°49'58"W
Decimal Degree (lat, lon): 38.8975,-120.83277777778

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 F Fe H K Mg Mn Mo Na O Pb S Si Te Ti 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
BrookiteCalciteChloriteClayCopperCorundumEnargiteFeldsparGarnetMica
NoneNot in a structural groupPrehnitePyritePyroxeneQuartzRocksaltRutileScheeliteSerpentine
Smectite-vermiculiteSpinelVesuvianiteWurtzite

27 IMA Minerals at location:
Albite  (*)Anatase  (*)Brookite  (*)Calcite  (*)Chromite  (*)
Chrysotile  (*)Clinochlore  (*)Copper  (*)Diopside  (*)Enargite  (*)
Galena  (*)Gold  (*)Graphite  (*)Grossular  (*)Hessite  (*)
Ilmenite  (*)Margarite  (*)Muscovite  (*)Nontronite  (*)Paragonite  (*)
Prehnite  (*)Pyrite  (*)Pyrolusite  (*)Quartz  (*)Uvarovite  (*)
Vesuvianite  (*)Wulfenite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)11544928803
Anatase  (*)Not in a structural groupTiO211545122162
Brookite  (*)BrookiteTiO21154512700
Calcite  (*)CalciteCa(CO3)115449227770
Chromite  (*)SpinelFe2+Cr2O43883885154456,154470,154478,154493,1545383902
Chrysotile  (*)Serpentine ClayMg3Si2O5(OH)41154510951
Clinochlore  (*)Chlorite ClayMg5Al(AlSi3O10)(OH)83154478,154491,1545411756
Copper  (*)CopperCu2154513,1545353846
Diopside  (*)PyroxeneCaMgSi2O611545414135
Enargite  (*)Enargite WurtziteCu3AsS41154490910
Galena  (*)RocksaltPbS115449124243
Gold  (*)CopperAu37154455,154458,154459,154460,154461,154463,154467,154468,154477,154479,154480,154484,154487,154488,154489,154492,154495,154496,154497,154498,154499,154507,154516,154517,154519,154520,154522,154523,154524,154525,154528,154529,154530,154532,154533,154537,15453930554
Graphite  (*)NoneC11545042812
Grossular  (*)GarnetCa3Al2(SiO4)311545411544
Hessite  (*)NoneAg2Te1154491804
Ilmenite  (*)CorundumFe2+Ti4+O311544915433
Margarite  (*)Mica ClayCaAl2Si2Al2O10(OH)22154491,154504168
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22154485,15450417380
Nontronite  (*)Clay Smectite-vermiculiteNa0.3Fe3+2(Si,Al)4O10(OH)2·nH2O1154491471
Paragonite  (*)Mica ClayNaAl2(Si3Al)O10(OH)21154504247
Prehnite  (*)PrehniteCa2Al(Si3Al)O10(OH)211545411898
Pyrite  (*)PyriteFeS23154477,154492,15449839462
Pyrolusite  (*)RutileMnO211544853106
Quartz  (*)QuartzSiO229154452,154455,154458,154459,154460,154461,154463,154468,154477,154480,154488,154489,154491,154492,154497,154499,154507,154516,154517,154519,154522,154523,154524,154525,154529,154530,154533,154537,15453961156
Uvarovite  (*)GarnetCa3Cr2(SiO4)31154478212
Vesuvianite  (*)Vesuvianite(Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)102154506,1545411395
Wulfenite  (*)ScheelitePbMoO411544881655



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-00128388388pre-Early Devonian-Jurassic (388±17 Ma U-Pb zircon from felsic igneous rocks; 174 Ma K-Ar white mica from blueschists)       Cr77679Green Claim, Meadow Brook, Georgetown District, East Segment Mother Lode, Mother Lode Belt, El Dorado Co., California, USAGreen ClaimMoiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


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