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:
Iron Mountain, Iron Mountain Complex, Fremont Co., Colorado, USA

Oldest recorded age at locality: 540
Youngest recorded age at locality: 506

mindat Locality ID: 6124
mindat URL: http://www.mindat.org/loc-6124.html

Tectonic Settings:

Total number of sublocalities beneath "Iron Mountain, Iron Mountain Complex, Fremont Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 38°21'25"N
Longitude: 105°25'39"W
Decimal Degree (lat, lon): 38.356944444444,-105.4275
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 C Ca Ce Cu F Fe K Mg Na Ni O S Si Ti Zr 

Elements from minerals reported directly at this locality: Al C Ca Ce Cu F Fe K Mg Na Ni O S Si Ti Zr 

Structural Groups for minerals in this locality: 
AmphiboleBastnäsiteChalcopyriteCorundumFeldsparNickelineNonePyritePyroxeneRutile
SpinelTridymiteZircon

17 IMA Minerals at location:
Aegirine  (*)Anorthite  (*)Augite  (*)Bastnäsite-(Ce)  (*)Chalcopyrite  (*)
Hercynite  (*)Ilmenite  (*)Kaersutite  (*)Magnetite  (*)Nepheline  (*)
Pyrite  (*)Pyrrhotite  (*)Rutile  (*)Smythite  (*)Spinel  (*)
Ulvöspinel  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Aegirine  (*)PyroxeneNaFe3+Si2O654050601022
Anorthite  (*)FeldsparCa(Al2Si2O8)54050601036
Augite  (*)Pyroxene(Ca,Mg,Fe)2Si2O654050602060
Bastnäsite-(Ce)  (*)BastnäsiteCe(CO3)F5405060304
Chalcopyrite  (*)ChalcopyriteCuFeS2540506027198
Hercynite  (*)SpinelFe2+Al2O45405060407
Ilmenite  (*)CorundumFe2+Ti4+O354050605433
Kaersutite  (*)AmphiboleNaCa2(Mg3AlTi4+)(Si6Al2)O22O25405060179
Magnetite  (*)SpinelFe2+Fe3+2O4540506014899
Nepheline  (*)TridymiteNa3K(Al4Si4O16)5405060884
Pyrite  (*)PyriteFeS2540506039462
Pyrrhotite  (*)NickelineFe7S854050609056
Rutile  (*)RutileTiO254050605614
Smythite  (*)None(Fe,Ni)3+xS4 (x ≈ 0-0.3)540506077
Spinel  (*)SpinelMgAl2O454050601934
Ulvöspinel  (*)SpinelFe2+2TiO45405060120
Zircon  (*)ZirconZr(SiO4)54050605251


Locality Notes from all Ages at Locality:
Age IDLocality Notes
Jen_0000893MAGMATIC STYLE: Dykes. ASSOCIATED SILICATE ROCKS: Pyroxenite, dunite, gabbro, ijolite, nepheline syenite, trachyte, phonolite, lamprophyre, fenite.
Jen_0000894MAGMATIC STYLE: Dykes. ASSOCIATED SILICATE ROCKS: Pyroxenite, dunite, gabbro, ijolite, nepheline syenite, trachyte, phonolite, lamprophyre, fenite.
Jen_0000895MAGMATIC STYLE: Dykes. ASSOCIATED SILICATE ROCKS: Pyroxenite, dunite, gabbro, ijolite, nepheline syenite, trachyte, phonolite, lamprophyre, fenite.
Jen_0000896MAGMATIC STYLE: Dykes. ASSOCIATED SILICATE ROCKS: Pyroxenite, dunite, gabbro, ijolite, nepheline syenite, trachyte, phonolite, lamprophyre, fenite.
Jen_0000897MAGMATIC STYLE: Dykes. ASSOCIATED SILICATE ROCKS: Pyroxenite, dunite, gabbro, ijolite, nepheline syenite, trachyte, phonolite, lamprophyre, fenite.
Jen_0000898MAGMATIC STYLE: Dykes. ASSOCIATED SILICATE ROCKS: Pyroxenite, dunite, gabbro, ijolite, nepheline syenite, trachyte, phonolite, lamprophyre, fenite.


6 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
Jen_0000893528528528K-Ar amphibole, biotite  Yes  122863McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USAMcClure MountainWoolley and Kjarsgaard (2008)10.4095/225115GSCOF5796 
Jen_0000894520520520K-Ar    Yes  122863McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USAMcClure MountainWoolley and Kjarsgaard (2008)10.4095/225115GSCOF5796 
Jen_0000895508508508K-Ar    Yes  122863McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USAMcClure MountainWoolley and Kjarsgaard (2008)10.4095/225115GSCOF5796 
Jen_0000896521521521Rb-Sr    Yes  122863McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USAMcClure MountainWoolley and Kjarsgaard (2008)10.4095/225115GSCOF5796 
Jen_0000897540530535±5Rb-Sr    Yes  122863McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USAMcClure MountainWoolley and Kjarsgaard (2008)10.4095/225115GSCOF5796 
Jen_0000898506506506fission-track titanite  YesTitanite  122863McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USAMcClure MountainWoolley and Kjarsgaard (2008)10.4095/225115GSCOF5796 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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