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:
J-M Reef (Howland Reef), Stillwater Complex, Nye, Stillwater Co., Montana, USA

Oldest recorded age at locality: 2906
Youngest recorded age at locality: 2681

mindat Locality ID: 251071
mindat URL: http://www.mindat.org/loc-251071.html

Tectonic Settings:

Total number of sublocalities beneath "J-M Reef (Howland Reef), Stillwater Complex, Nye, Stillwater Co., Montana, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Minneapolis Adit

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0
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 Au Bi Ca Cu Fe H Hg K Mg Ni O Pb Pd Pt Ru S Si Sn Te 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleAuricuprideChalcopyriteClayCopperCubaniteMeloniteMicaNickelineNone
PentlanditePerovskitePotaritePyritePyroxeneSpinelStillwateriteTalcWurtzite

31 IMA Minerals at location:
Arsenopalladinite  (*)Atokite  (*)Braggite  (*)Chalcopyrite  (*)Cooperite  (*)
Cubanite  (*)Enstatite  (*)Gold  (*)Isoferroplatinum  (*)Keithconnite  (*)
Kojonenite  (*)Kotulskite  (*)Laurite  (*)Mackinawite  (*)Magnetite  (*)
Moncheite  (*)Palarstanide  (*)Pentlandite  (*)Phlogopite  (*)Platarsite  (*)
Plumbopalladinite  (*)Potarite  (*)Pyrite  (*)Pyrrhotite  (*)Stannopalladinite  (*)
Talc  (*)Telluropalladinite  (*)Tremolite  (*)Tulameenite  (*)Vysotskite  (*)
Zvyagintsevite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Arsenopalladinite  (*)StillwateritePd8As329062681123409631
Atokite  (*)Auricupride PerovskitePd3Sn29062681123409629
Braggite  (*)NonePdPt3S4290626811234096101
Chalcopyrite  (*)ChalcopyriteCuFeS229062681123409627198
Cooperite  (*)NonePtS290626811234096124
Cubanite  (*)Cubanite WurtziteCuFe2S3290626811234096802
Enstatite  (*)PyroxeneMg2Si2O6290626811234096944
Gold  (*)CopperAu29062681123409630554
Isoferroplatinum  (*)Auricupride PerovskitePt3Fe290626811234096128
Keithconnite  (*)NonePd20Te729062681123409640
Kojonenite  (*)NonePd7-xSnTe2 (0.3 ≤ x ≤ 0.8)2906268112340961
Kotulskite  (*)NickelinePd(Te,Bi)2-x (x ≈ 0.4)290626811234096116
Laurite  (*)PyriteRuS2290626811234096226
Mackinawite  (*)None(Fe,Ni)1+xS (x = 0-0.07)290626811234096451
Magnetite  (*)SpinelFe2+Fe3+2O429062681123409614899
Moncheite  (*)MelonitePt(Te,Bi)2290626811234096133
Palarstanide  (*)StillwateritePd5(Sn,As)229062681123409613
Pentlandite  (*)Pentlandite(Ni,Fe)9S82906268112340961512
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)22906268112340962273
Platarsite  (*)PyritePtAsS29062681123409644
Plumbopalladinite  (*)NonePd3Pb229062681123409610
Potarite  (*)PotaritePdHg27162693123409625
Pyrite  (*)PyriteFeS229062681123409639462
Pyrrhotite  (*)NickelineFe7S82906268112340969056
Stannopalladinite  (*)None(Pd,Cu)3Sn29062681123409612
Talc  (*)Clay TalcMg3Si4O10(OH)22906268112340963337
Telluropalladinite  (*)NonePd9Te429062681123409615
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)22906268112340962562
Tulameenite  (*)PotaritePt2CuFe29062681123409648
Vysotskite  (*)NonePdS29062681123409653
Zvyagintsevite  (*)Auricupride PerovskitePd3Pb29062681123409632


4 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-0003527162693 U-Pb, Sm-Nd    YesPotarite, 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- Yes  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   Yes  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    YesMolybdenite, TarkianiteMo3883Stillwater Complex, Nye, Stillwater Co., Montana, USA DePaolo and Wasserburg (1979); Premo et al. (1990)   

SampleSource LocalityReference URL
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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