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:
Frog Pond West Occurrence (J-M Reef), Stillwater Complex, Sweet Grass Co., Montana, USA

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

mindat Locality ID: 161558
mindat URL: http://www.mindat.org/loc-161558.html

Tectonic Settings:

Total number of sublocalities beneath "Frog Pond West Occurrence (J-M Reef), Stillwater Complex, Sweet Grass Co., Montana, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 45°27'16"N
Longitude: 110°8'18"W
Decimal Degree (lat, lon): 45.454444444444,-110.13833333333

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 Ca Cu Fe H K Mg Ni O S Si 

Elements from minerals reported directly at this locality: Al Ca Cu Fe H K Mg Ni O S Si 

Structural Groups for minerals in this locality: 
AmphiboleChalcopyriteClayMicaNickelineNonePentlanditePyriteSpinelTalc

8 IMA Minerals at location:
Chalcopyrite  (*)Magnetite  (*)Pentlandite  (*)Phlogopite  (*)Pyrite  (*)
Pyrrhotite  (*)Talc  (*)Tremolite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Chalcopyrite  (*)ChalcopyriteCuFeS229062681027198
Magnetite  (*)SpinelFe2+Fe3+2O429062681014899
Pentlandite  (*)Pentlandite(Ni,Fe)9S82906268101512
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)22906268102273
Pyrite  (*)PyriteFeS229062681039462
Pyrrhotite  (*)NickelineFe7S82906268109056
Talc  (*)Clay TalcMg3Si4O10(OH)22906268103337
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)22906268102562



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
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 


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

All age data...

Other copyright data...