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:
Eureka Tunnel (1-15 Pegmatite), St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA

Oldest recorded age at locality: 1079
Youngest recorded age at locality: 1075

mindat Locality ID: 112802
mindat URL: http://www.mindat.org/loc-112802.html

Tectonic Settings:

Total number of sublocalities beneath "Eureka Tunnel (1-15 Pegmatite), St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 38°45'6"N
Longitude: 104°54'15"W
Decimal Degree (lat, lon): 38.751666666667,-104.90416666667
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 Be Ca F Fe H K Mg Na O Si Ti Zr 

Elements from minerals reported directly at this locality: Al Be Ca F Fe H K Mg Na O Si Ti Zr 

Structural Groups for minerals in this locality: 
AmphiboleAstrophylliteClayFeldsparFluoriteKaoliniteNoneNot in a structural groupPerovskitePyrochlore
QuartzRutileWeberiteZircon

18 IMA Minerals at location:
Astrophyllite  (*)Bertrandite  (*)Cryolite  (*)Elpasolite  (*)Fluorite  (*)
Gearksutite  (*)Hydrokenoralstonite  (*)Kaolinite  (*)Microcline  (*)Nacrite  (*)
Pachnolite  (*)Prosopite  (*)Quartz  (*)Riebeckite  (*)Rutile  (*)
Thomsenolite  (*)Weberite  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Astrophyllite  (*)AstrophylliteK2NaFe2+7Ti2(Si4O12)2O2(OH)4F107910750161
Bertrandite  (*)Not in a structural groupBe4Si2O7(OH)2107910750606
Cryolite  (*)PerovskiteNa2NaAlF610791075050
Elpasolite  (*)PerovskiteK2NaAlF610791075016
Fluorite  (*)FluoriteCaF21079107509617
Gearksutite  (*)NoneCaAlF4(OH)·H2O10791075068
Hydrokenoralstonite  (*)Pyrochlore   2Al2F6(H2O)10791075056
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)41079107505591
Microcline  (*)FeldsparK(AlSi3O8)1079107504924
Nacrite  (*)Clay KaoliniteAl2Si2O5(OH)4107910750112
Pachnolite  (*)NoneNaCaAlF6·H2O10791075018
Prosopite  (*)NoneCaAl2F4(OH)410791075039
Quartz  (*)QuartzSiO210791075061156
Riebeckite  (*)Amphibole   Na2(Fe2+3Fe3+2)Si8O22(OH)2107910750375
Rutile  (*)RutileTiO21079107505614
Thomsenolite  (*)NoneNaCaAlF6·H2O10791075023
Weberite  (*)WeberiteNa2MgAlF710791075013
Zircon  (*)ZirconZr(SiO4)1079107505251


1 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
Bradley_2012_132107910751077±2Ar/Ar    Yes  3668Pikes Peak, El Paso Co., Colorado, USAPike's PeakMcCauley and Bradley (2014)10.3749/canmin.52.2.183CM52_183 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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