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 Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USA

Oldest recorded age at locality: 172
Youngest recorded age at locality: 0

mindat Locality ID: 80795
mindat URL: http://www.mindat.org/loc-80795.html

Tectonic Settings:

Total number of sublocalities beneath "East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USA": 100
Total number of bottom-level sublocalities: 87

Number of Child Localities: 8
Child Localities:
Aetna Springs Area
Caldwell Pines
Castle Rock Springs
Cobb
Detert Reservoir
Howard Springs
Lakeport Area
Middletown

Latitude: 38°48'1"N
Longitude: 122°41'14"W
Decimal Degree (lat, lon): 38.800277777778,-122.68722222222

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 B C Ca Cr Cu Fe H Hg Mg Mn Na Ni O Pb S Sb Se Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmorphousAmphiboleAragoniteBerylCalciteChalcopyriteClayEpsomiteFeldsparMalachite
MarcasiteMilleriteNoneNot in a structural groupPectolitePyriteQuartzRutileSerpentineSphalerite
SpinelWollastonite

30 IMA Minerals at location:
Anorthite  (*)Aragonite  (*)Azurite  (*)Calcite  (*)Chalcocite  (*)
Chalcopyrite  (*)Chromite  (*)Chrysotile  (*)Cinnabar  (*)Cordierite  (*)
Dolomite  (*)Epsomite  (*)Glaucophane  (*)Idrialite  (*)Jamesonite  (*)
Magnesiochromite  (*)Magnesite  (*)Malachite  (*)Marcasite  (*)Mercury  (*)
Metacinnabar  (*)Millerite  (*)Opal  (*)Pectolite  (*)Pyrite  (*)
Pyrolusite  (*)Quartz  (*)Sassolite  (*)Tiemannite  (*)Wollastonite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Anorthite  (*)FeldsparCa(Al2Si2O8)2.9011607321036
Aragonite  (*)AragoniteCa(CO3)2.9011606563250
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)22.9011607115509
Calcite  (*)CalciteCa(CO3)16404160654,160668,160720,16073527770
Chalcocite  (*)NoneCu2S2.9011607275707
Chalcopyrite  (*)ChalcopyriteCuFeS22.90116073727198
Chromite  (*)SpinelFe2+Cr2O417216416160645,160671,160675,160678,160682,160683,160685,160686,160689,160701,160718,160720,160721,160722,160726,1607383902
Chrysotile  (*)Serpentine ClayMg3Si2O5(OH)42.901160731951
Cinnabar  (*)NoneHgS164020160651,160652,160653,160654,160655,160656,160657,160659,160662,160666,160668,160684,160705,160710,160720,160723,160724,160729,160730,1607332600
Cordierite  (*)BerylMg2Al4Si5O182.9011607021008
Dolomite  (*)NoneCaMg(CO3)216403160653,160720,1607309895
Epsomite  (*)EpsomiteMg(SO4)·7H2O2.901160656484
Glaucophane  (*)Amphibole   Na2(Mg3Al2)Si8O22(OH)22.901160666286
Idrialite  (*)NoneC22H1416404160656,160659,160720,16073015
Jamesonite  (*)NonePb4FeSb6S141641641160720784
Magnesiochromite  (*)SpinelMgCr2O42.901160679311
Magnesite  (*)CalciteMg(CO3)2.9011606541487
Malachite  (*)MalachiteCu2(CO3)(OH)22.902160711,16072712537
Marcasite  (*)MarcasiteFeS22.9011606565674
Mercury  (*)NoneHg16406160653,160654,160656,160666,160720,160730397
Metacinnabar  (*)SphaleriteHgS16403160656,160720,160730255
Millerite  (*)MilleriteNiS16416411607201066
Opal  (*)AmorphousSiO2·nH2O1641642160656,1607202994
Pectolite  (*)PectoliteNaCa2Si3O8(OH)2.901160735363
Pyrite  (*)PyriteFeS21641644160656,160659,160668,16072039462
Pyrolusite  (*)RutileMnO22.9011606463106
Quartz  (*)QuartzSiO21641645160653,160654,160666,160696,16072061156
Sassolite  (*)NoneB(OH)32.90116067431
Tiemannite  (*)SphaleriteHgSe1641642160656,16072083
Wollastonite  (*)WollastoniteCaSiO32.9011607151247



10 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
Hg-001102.90 ?-?     Cinnabar, Mercury, Metacinnabar, Schuetteite, TiemanniteHg80795East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USA Smith et al. (2008)10.1016/j.epsl.2008.02.029EPSL269_399 
NAVDAT-1303841.681.641.66±0.02   130384    229400Caldwell Pines, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USA NAVDAT NAVDAT 
podchrome-00325172166Middle Jurassic (169±3 U-Pb, zircon in plagiogranite)  zircon   Zircon Cr80817Gunn Claim, Caldwell Pines, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USAGunn ClaimsMoiser et al. (2012) USGSSIR2012_5157 
NAVDAT-1303781.071.031.05±0.02   130378    80901Unnamed Cr Occurrence (6), Cobb, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USA NAVDAT NAVDAT 
podchrome-00324164164Middle Jurassic (161-168 Ma)       Cr80785Butler Claims, Detert Reservoir, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USAButler ClaimsMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00323164164Middle Jurassic (161-168 Ma)       Cr80774Great Western Mine (Laguna Western; Black Bart Mine; Tucker Lease), Great Western-Mirabel Group, Middletown, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USABlack BartMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00326172166Middle Jurassic (169±3 U-Pb, zircon in plagiogranite)  zircon   Zircon Cr80820Harp And Sons Ranch Deposits, Middletown, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USAHarp and Sons RanchMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00327164164Middle Jurassic (161-168 Ma)       Cr80827Holmstatt Deposit (Holmstedt Deposit), Middletown, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USAHolmstedtMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00074164164Middle Jurassic (161-168 Ma)       Cr80834Kangaroo Court Mine, Middletown, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USAKangaroo CourtMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00274164164Middle Jurassic (161-168 Ma)       Cr80893Sutro Mine, Middletown, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Lake Co., California, USASutroMoiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


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