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:
Stillwater Co., Montana, USA

Oldest recorded age at locality: 2906
Youngest recorded age at locality: 1464.2

mindat Locality ID: 19987
mindat URL: http://www.mindat.org/loc-19987.html

Tectonic Settings:

Total number of sublocalities beneath "Stillwater Co., Montana, USA": 43
Total number of bottom-level sublocalities: 37

Number of Child Localities: 6
Child Localities:
Hawkes Lode Prospect
Jim Hawkes Prospect (Cathedral Peak Claims)
Nye
Rosebud Occurrence
Stillwater Calcite Deposits
Stillwater Complex

Latitude: 45°21'40"N
Longitude: 109°47'45"W
Decimal Degree (lat, lon): 45.361111111111,-109.79583333333
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 Bi C Ca Cl Co Cr Cu F Fe H Hg K Mg Mo Na Ni O P Pb Pd Pt Re Rh Ru S Sb Si Sn Te Ti Zn Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleApatiteArsenopyriteAuricuprideBerylCalciteChalcopyriteClayClinozoisiteCobaltite
CopperCorundumCovelliteCubaniteDiasporeEpidoteFeldsparGarnetMarcasiteMelonite
MicaMilleriteMolybdeniteNatroliteNickelineNoneNot in a structural groupOlivinePentlanditePerovskite
PotaritePyritePyroxeneQuartzRocksaltRutileSerpentineSmectite-vermiculiteSphaleriteSpinel
StauroliteStibniteStillwateriteTalcTetrahedriteTitaniteUllmanniteWurtziteZircon

104 IMA Minerals at location:
Actinolite  (*)Almandine  (*)Annite  (*)Anorthite  (*)Anthophyllite  (*)
Arsenopalladinite  (*)Arsenopyrite  (*)Atokite  (*)Augite  (*)Bornite  (*)
Braggite  (*)Calcite  (*)Carrollite  (*)Chalcopyrite  (*)Chlorapatite  (*)
Chromite  (*)Chrysotile  (*)Cobaltite  (*)Cooperite  (*)Copper  (*)
Cordierite  (*)Covellite  (*)Cubanite  (*)Cummingtonite  (*)Cuprite  (*)
Enstatite  (*)Epidote  (*)Fluorapatite  (*)Forsterite  (*)Galena  (*)
Goethite  (*)Gold  (*)Graphite  (*)Grossular  (*)Heazlewoodite  (*)
Hematite  (*)Hercynite  (*)Hessite  (*)Hollingworthite  (*)Ilmenite  (*)
Isoferroplatinum  (*)Keithconnite  (*)Kojonenite  (*)Kotulskite  (*)Laumontite  (*)
Laurite  (*)Mackinawite  (*)Magnetite  (*)Marcasite  (*)Menshikovite  (*)
Merenskyite  (*)Mertieite-II  (*)Michenerite  (*)Millerite  (*)Molybdenite  (*)
Moncheite  (*)Mooihoekite  (*)Muscovite  (*)Natrolite  (*)Nickeline  (*)
Nontronite  (*)Palarstanide  (*)Palladium  (*)Palladoarsenide  (*)Palladobismutharsenide  (*)
Gersdorffite-Pa3  (*)Pargasite  (*)Pentlandite  (*)Phlogopite  (*)Pigeonite  (*)
Platarsite  (*)Platinum  (*)Plumbopalladinite  (*)Potarite  (*)Pyrite  (*)
Pyrrhotite  (*)Quartz  (*)Rhodium  (*)Rustenburgite  (*)Rutile  (*)
Siderophyllite  (*)Silver  (*)Sperrylite  (*)Sphalerite  (*)Stannopalladinite  (*)
Staurolite  (*)Stibnite  (*)Stillwaterite  (*)Talc  (*)Talnakhite  (*)
Tarkianite  (*)Telargpalite  (*)Telluropalladinite  (*)Temagamite  (*)Tetraferroplatinum  (*)
Tetrahedrite-(Zn)  (*)Titanite  (*)Tremolite  (*)Tulameenite  (*)Violarite  (*)
Vysotskite  (*)Zircon  (*)Zoisite  (*)Zvyagintsevite  (*)
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)229062188.312340813419
Almandine  (*)GarnetFe2+3Al2(SiO4)32661.11667.72234104,2341072353
Annite  (*)Mica ClayKFe2+3(AlSi3O10)(OH)229062188.31234081356
Anorthite  (*)FeldsparCa(Al2Si2O8)29062188.312340811036
Anthophyllite  (*)Amphibole   Mg2Mg5Si8O22(OH)229062188.31234081718
Arsenopalladinite  (*)StillwateritePd8As329062188.33234081,234096,23409731
Arsenopyrite  (*)ArsenopyriteFeAsS2608.32188.312340979052
Atokite  (*)Auricupride PerovskitePd3Sn29062188.32234096,23409729
Augite  (*)Pyroxene(Ca,Mg,Fe)2Si2O629062188.312340812060
Bornite  (*)NoneCu5FeS412341095516
Braggite  (*)NonePdPt3S429062188.39234081,234086,234094,234096,234097,234102,234103,234109,234120101
Calcite  (*)CalciteCa(CO3)2608.32188.32234081,23409727770
Carrollite  (*)SpinelCuCo2S42608.32188.31234097154
Chalcopyrite  (*)ChalcopyriteCuFeS229061667.723234081,234083,234084,234085,234086,234088,234090,234091,234092,234093,234094,234096,234097,234101,234102,234103,234104,234106,234107,234109,234114,234115,23412027198
Chlorapatite  (*)ApatiteCa5(PO4)3Cl2608.32188.32234081,234097203
Chromite  (*)SpinelFe2+Cr2O429061667.713234081,234082,234083,234085,234086,234097,234104,234107,234108,234110,234111,234113,2341193902
Chrysotile  (*)Serpentine ClayMg3Si2O5(OH)429062188.31234081951
Cobaltite  (*)CobaltiteCoAsS29062188.32234085,234097966
Cooperite  (*)NonePtS29062188.37234081,234086,234092,234096,234097,234103,234120124
Copper  (*)CopperCu2608.32188.32234081,2340973846
Cordierite  (*)BerylMg2Al4Si5O1829061667.72234081,2341071008
Covellite  (*)CovelliteCuS2608.32188.32234097,2341094165
Cubanite  (*)Cubanite WurtziteCuFe2S329062188.36234081,234086,234096,234097,234103,234109802
Cummingtonite  (*)Amphibole   Mg2Mg5Si8O22(OH)229062188.31234081327
Cuprite  (*)Not in a structural groupCu2O2608.32188.32234081,2340972970
Enstatite  (*)PyroxeneMg2Si2O629061667.77234081,234082,234096,234097,234104,234107,234119944
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)2661.11667.73234081,234097,2341078173
Fluorapatite  (*)ApatiteCa5(PO4)3F29062188.312340812740
Forsterite  (*)OlivineMg2(SiO4)12341041188
Galena  (*)RocksaltPbS29062188.32234085,23409724243
Goethite  (*)DiasporeFeO(OH)29062188.312340817437
Gold  (*)CopperAu29062188.34234081,234085,234096,23409730554
Graphite  (*)NoneC29062188.33234081,234086,2340972812
Grossular  (*)GarnetCa3Al2(SiO4)312341041544
Heazlewoodite  (*)NoneNi3S229062188.34234081,234086,234097,234103205
Hematite  (*)CorundumFe2O3290626813234081,234085,23410314640
Hercynite  (*)SpinelFe2+Al2O41234119407
Hessite  (*)NoneAg2Te2608.32188.32234081,234097804
Hollingworthite  (*)UllmanniteRhAsS29062188.33234081,234085,234097119
Ilmenite  (*)CorundumFe2+Ti4+O329061667.77234081,234085,234097,234104,234107,234109,2341205433
Isoferroplatinum  (*)Auricupride PerovskitePt3Fe29061667.74234081,234096,234097,234107128
Keithconnite  (*)NonePd20Te729062188.34234081,234085,234096,23409740
Kojonenite  (*)NonePd7-xSnTe2 (0.3 ≤ x ≤ 0.8)2906268112340961
Kotulskite  (*)NickelinePd(Te,Bi)2-x (x ≈ 0.4)29062188.34234081,234096,234097,234120116
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O29062188.312340811271
Laurite  (*)PyriteRuS229061667.75234081,234083,234096,234097,234107226
Mackinawite  (*)None(Fe,Ni)1+xS (x = 0-0.07)29062188.34234081,234086,234096,234097451
Magnetite  (*)SpinelFe2+Fe3+2O429061667.716234081,234083,234085,234086,234090,234091,234094,234096,234097,234101,234103,234104,234106,234107,234109,23411514899
Marcasite  (*)MarcasiteFeS229062188.35234081,234086,234097,234102,2341035674
Menshikovite  (*)NonePd3Ni2As329062188.3123408115
Merenskyite  (*)MelonitePdTe229062188.31234081155
Mertieite-II  (*)StillwateritePd8Sb2.5As0.52608.32188.32234081,23409744
Michenerite  (*)UllmannitePdBiTe2608.32188.32234081,234097114
Millerite  (*)MilleriteNiS29062188.37234081,234085,234086,234094,234097,234103,2341091066
Molybdenite  (*)MolybdeniteMoS22716269312340815800
Moncheite  (*)MelonitePt(Te,Bi)229062188.311234081,234084,234085,234086,234092,234096,234097,234102,234103,234109,234120133
Mooihoekite  (*)ChalcopyriteCu9Fe9S162608.32188.32234081,23409720
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22661.11667.7123410717380
Natrolite  (*)NatroliteNa2(Si3Al2)O10·2H2O2608.32188.312340971236
Nickeline  (*)NickelineNiAs2608.32188.33234081,234097,234103633
Nontronite  (*)Clay Smectite-vermiculiteNa0.3Fe3+2(Si,Al)4O10(OH)2·nH2O2608.32188.31234097471
Palarstanide  (*)StillwateritePd5(Sn,As)229062681123409613
Palladium  (*)CopperPd2608.32188.32234081,23409759
Palladoarsenide  (*)NonePd2As29062188.34234081,234086,234097,23410237
Palladobismutharsenide  (*)NonePd2(As,Bi)2608.32188.32234081,2340976
Gersdorffite-Pa3  (*)PyriteNiAsS2608.32188.32234081,234097767
Pargasite  (*)AmphiboleNaCa2(Mg4Al)(Si6Al2)O22(OH)229062188.31234081313
Pentlandite  (*)Pentlandite(Ni,Fe)9S829061667.724234081,234083,234084,234085,234086,234088,234090,234091,234092,234093,234094,234096,234097,234101,234102,234103,234104,234106,234107,234109,234114,234115,234119,2341201512
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)2290626813234081,234096,2341042273
Pigeonite  (*)Pyroxene(Mg,Fe,Ca)2Si2O629061667.72234081,234107303
Platarsite  (*)PyritePtAsS29062681123409644
Platinum  (*)CopperPt29062188.31234081485
Plumbopalladinite  (*)NonePd3Pb229062188.33234081,234096,23409710
Potarite  (*)PotaritePdHg27162693123409625
Pyrite  (*)PyriteFeS229062188.313234081,234084,234085,234086,234088,234092,234094,234096,234097,234102,234103,234109,23412039462
Pyrrhotite  (*)NickelineFe7S829061667.724234081,234083,234084,234085,234086,234088,234090,234091,234092,234093,234094,234096,234097,234101,234102,234103,234104,234106,234107,234109,234114,234115,234119,2341209056
Quartz  (*)QuartzSiO229062188.3123408161156
Rhodium  (*)CopperRh2608.32188.32234081,23409717
Rustenburgite  (*)Perovskite AuricupridePt3Sn2608.32188.32234081,23409734
Rutile  (*)RutileTiO212341045614
Siderophyllite  (*)MicaKFe2+2Al(Si2Al2)O10(OH)229062188.3123408192
Silver  (*)CopperAg29062188.312340815186
Sperrylite  (*)PyritePtAs229062188.38234081,234084,234085,234086,234097,234102,234103,234120337
Sphalerite  (*)SphaleriteZnS29062188.35234085,234092,234097,234103,23412021482
Stannopalladinite  (*)None(Pd,Cu)3Sn29062681123409612
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)29062188.31234081978
Stibnite  (*)StibniteSb2S32608.32188.312340973418
Stillwaterite  (*)StillwateritePd8As329062188.33234081,234086,23409724
Talc  (*)Clay TalcMg3Si4O10(OH)229062188.34234081,234096,234097,2341043337
Talnakhite  (*)ChalcopyriteCu9Fe8S1629062188.3123408135
Tarkianite  (*)None (Cu,Fe)(Re,Mo)4S82716269312340816
Telargpalite  (*)None(Pd,Ag)3Te2608.32188.32234081,23409718
Telluropalladinite  (*)NonePd9Te429062188.33234081,234096,23409715
Temagamite  (*)NonePd3HgTe32608.32188.32234081,23409724
Tetraferroplatinum  (*)PotaritePtFe29062188.3123408166
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S1312341035317
Titanite  (*)TitaniteCaTi(SiO4)O12341034899
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)229062188.32234096,2340972562
Tulameenite  (*)PotaritePt2CuFe290626812234081,23409648
Violarite  (*)SpinelFeNi2S42608.32188.33234081,234097,234103380
Vysotskite  (*)NonePdS29062188.310234081,234085,234086,234094,234096,234097,234102,234103,234109,23412053
Zircon  (*)ZirconZr(SiO4)29061667.72234081,2341075251
Zoisite  (*)EpidoteCa2Al3[Si2O7][SiO4]O(OH)29062188.312340811025
Zvyagintsevite  (*)Auricupride PerovskitePd3Pb29062188.33234081,234096,23409732


17 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
USGS-U-Th-Pb-00330_206_238162816281628206_238 zircon   Zircon  161988Hawkes Lode Prospect, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00330_207_2062760.62760.62760.6207_206 zircon   Zircon  161988Hawkes Lode Prospect, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00330_207_2352186.22186.22186.2207_235 zircon   Zircon  161988Hawkes Lode Prospect, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00331_206_2381464.21464.21464.2206_238 zircon   Zircon  161988Hawkes Lode Prospect, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00331_207_206280228022802207_206 zircon   Zircon  161988Hawkes Lode Prospect, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00331_207_2352102.32102.32102.3207_235 zircon   Zircon  161988Hawkes Lode Prospect, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00332_206_238244224422442206_238 apatite     161988Hawkes Lode Prospect, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00332_207_2062705.82625.82665.8±40207_206 apatite     161988Hawkes Lode Prospect, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00332_207_2352566.22566.22566.2207_235 apatite     161988Hawkes Lode Prospect, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
Hg-0003527162693 U-Pb, Sm-Nd     Potarite, TemagamiteHg3883Stillwater Complex, Nye, Stillwater Co., Montana, USA DePaolo and Wasserburg (1979); Premo et al. (1990)   
JP35_1717-00001290627542830±76Re-Os high 81MVL217, 801M02, 355-64-556.0, 355-64-684.5, 355-    3883Stillwater Complex, Nye, Stillwater Co., Montana, USAStillwater PGE deposit, Montana, USALambert et al. (1994)10.1093/petrology/35.6.1717JP35_1717 
JP35_1717-00002272126812701±20Sm-Nd high      3883Stillwater Complex, Nye, Stillwater Co., Montana, USAStillwater PGE deposit, Montana, USALambert et al. (1994)10.1093/petrology/35.6.1717JP35_1717 
Mo-0005927162693 U-Pb, Sm-Nd     Molybdenite, TarkianiteMo3883Stillwater Complex, Nye, Stillwater Co., Montana, USA DePaolo and Wasserburg (1979); Premo et al. (1990)   
USGS-Rb-Sr-030982608.32188.32398.3±210Rb-Srminimum age of intrusionwhole rock     30835Stillwater Mine, Stillwater Complex, Nye, Stillwater Co., Montana, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-U-Th-Pb-00319_206_2381667.71667.71667.7206_238 zircon   Zircon  163486Mouat Ni-Cu Verdegris Creek Prospect (Mountain View; Mouat-Sampson; Stillwater Copper-Nickel), Stillwater Complex, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00319_207_2062661.12661.12661.1207_206 zircon   Zircon  163486Mouat Ni-Cu Verdegris Creek Prospect (Mountain View; Mouat-Sampson; Stillwater Copper-Nickel), Stillwater Complex, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00319_207_2352156.62156.62156.6207_235 zircon   Zircon  163486Mouat Ni-Cu Verdegris Creek Prospect (Mountain View; Mouat-Sampson; Stillwater Copper-Nickel), Stillwater Complex, Stillwater Co., Montana, USA USGS-U-Th-Pb USGS-U-Th-Pb 

SampleSource LocalityReference URL
FKM-137Stillwater Complex, Nye, Stillwater Co., Montana, USAhttps://www.rockptx.com/fkm-126-to-fkm-150/#FKM-137
R060797Benbow Mine, Stillwater Complex, Nye, Stillwater Co., Montana, USAhttps://rruff.info/R060797
R070567Minneapolis Adit, J-M Reef (Howland Reef), Stillwater Complex, Nye, Stillwater Co., Montana, USAhttps://rruff.info/R070567

All locality data graciously provided by mindat.org

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