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:
Willard District, Humboldt Range, Pershing Co., Nevada, USA

Oldest recorded age at locality: 6.4
Youngest recorded age at locality: 5.8

mindat Locality ID: 37183
mindat URL: http://www.mindat.org/loc-37183.html

Tectonic Settings:

Total number of sublocalities beneath "Willard District, Humboldt Range, Pershing Co., Nevada, USA": 13
Total number of bottom-level sublocalities: 13

Number of Child Localities: 13
Child Localities:
Adriene Mine (Louis Lay Mine)
Clack Mine
Heizer Mine
Johnson Mine
Keystone Mine
Rosal Mine (Antimony King Mine)
Sec. 11 Clay Deposit
Sec. 2 Clay Deposit
Sec. 6 Clay Deposit
Sec. 8 Clay Deposit (1)
Sec. 8 Clay Deposit (2)
Unnamed Cu Prospect
Willard Mine

Latitude: 40°15'31"N
Longitude: 118°19'19"W
Decimal Degree (lat, lon): 40.258611111111,-118.32194444444
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 As Ba C Ca Cl Cu F Fe H Hg K Mg Mn N Na O P Pb S Sb Se Si Zn 

Elements from minerals reported directly at this locality: Cu Fe S 

Structural Groups for minerals in this locality: 
AluniteApatiteAragoniteBaryteBrochantiteCalcioferriteCalciteChalcopyriteClayDiaspore
DufréniteGypsumKaoliniteNonePharmacosideritePhosphofibritePhosphosideritePyriteQuartzRocksalt
RutileSmectite-vermiculiteSphaleriteStibniteSulphurTetrahedriteWavellite

36 IMA Minerals at location:
Anglesite  (*)Baryte  (*)Brochantite  (*)Cacoxenite  (*)Calcite  (*)
Cerussite  (*)Chalcopyrite  (*)Cinnabar  (*)Crandallite  (*)Dufrénite  (*)
Fluellite  (*)Fluorwavellite  (*)Galena  (*)Goethite  (*)Gypsum  (*)
Jarosite  (*)Kaolinite  (*)Mercury  (*)Metavariscite  (*)Meurigite-K  (*)
Mimetite  (*)Minyulite  (*)Montgomeryite  (*)Montmorillonite  (*)Mosesite  (*)
Pharmacosiderite  (*)Pyrite  (*)Pyrolusite  (*)Quartz  (*)Selenium  (*)
Sphalerite  (*)Stibnite  (*)Strengite  (*)Sulphur  (*)Tetrahedrite-(Zn)  (*)
Variscite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Anglesite  (*)BarytePb(SO4)6.45.812406062734
Baryte  (*)BaryteBa(SO4)6.45.8124060611547
Brochantite  (*)BrochantiteCu4(SO4)(OH)66.45.812406061633
Cacoxenite  (*)NoneFe3+24AlO6(PO4)17(OH)12·75H2O6.45.81240606280
Calcite  (*)CalciteCa(CO3)6.45.8124060627770
Cerussite  (*)AragonitePb(CO3)6.45.812406064979
Chalcopyrite  (*)ChalcopyriteCuFeS26.45.8027198
Cinnabar  (*)NoneHgS6.45.812405952600
Crandallite  (*)AluniteCaAl3(PO4)(PO3OH)(OH)66.45.81240606310
Dufrénite  (*)DufréniteCa0.5Fe2+Fe3+5(PO4)4(OH)6·2H2O6.45.81240606139
Fluellite  (*)NoneAl2(PO4)F2(OH)·7H2O6.45.8124060640
Fluorwavellite  (*)WavelliteAl3(PO4)2(OH)2F·5H2O6.45.8124060626
Galena  (*)RocksaltPbS6.45.82240598,24060624243
Goethite  (*)DiasporeFeO(OH)6.45.812406067437
Gypsum  (*)GypsumCa(SO4)·2H2O6.45.812406066890
Jarosite  (*)AluniteKFe3+3(SO4)2(OH)66.45.812406062228
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)46.45.812406065591
Mercury  (*)NoneHg6.45.81240595397
Metavariscite  (*)PhosphosideriteAl(PO4)·2H2O6.45.8124060627
Meurigite-K  (*)PhosphofibriteKFe3+8(PO4)6(OH)7·6.5H2O6.45.8124060621
Mimetite  (*)ApatitePb5(AsO4)3Cl6.45.812406061107
Minyulite  (*)NoneKAl2(PO4)2F·4H2O6.45.8124060631
Montgomeryite  (*)CalcioferriteCa4MgAl4(PO4)6(OH)4·12H2O6.45.8124060644
Montmorillonite  (*)Clay Smectite-vermiculite(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O6.45.85240600,240601,240602,240603,2406041508
Mosesite  (*)None(Hg2N)Cl6.45.812405956
Pharmacosiderite  (*)PharmacosideriteKFe3+4(AsO4)3(OH)4·6-7H2O6.45.81240606428
Pyrite  (*)PyriteFeS26.45.8124060639462
Pyrolusite  (*)RutileMnO26.45.812406063106
Quartz  (*)QuartzSiO26.45.8124060661156
Selenium  (*)SulphurSe6.45.81240606143
Sphalerite  (*)SphaleriteZnS6.45.8124060621482
Stibnite  (*)StibniteSb2S36.45.84240594,240596,240597,2405993418
Strengite  (*)NoneFe3+(PO4)·2H2O6.45.81240606263
Sulphur  (*)SulphurS6.45.802045
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S136.45.812406055317
Variscite  (*)NoneAl(PO4)·2H2O6.45.81240606301


2 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-000936.45.8 K-Ar     Cinnabar, Mercury, MosesiteHg37183Willard District, Humboldt Range, Pershing Co., Nevada, USA Noble et al. (1988); Coolbaugh et al. (2005)   
Hg-000516.45.8 K-Ar     Cinnabar, Mercury, MosesiteHg10114Clack Mine, Willard District, Humboldt Range, Pershing Co., Nevada, USA Noble et al. (1988); Coolbaugh et al. (2005)   

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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