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:
Gem Park Complex, Fremont Co., Colorado, USA

Oldest recorded age at locality: 551
Youngest recorded age at locality: 551

mindat Locality ID: 24296
mindat URL: http://www.mindat.org/loc-24296.html

Tectonic Settings:

Total number of sublocalities beneath "Gem Park Complex, Fremont Co., Colorado, USA": 5
Total number of bottom-level sublocalities: 5

Number of Child Localities: 5
Child Localities:
Gem Mine
Letha Lee Prospect
Pine Creek Drainage (Pine Gulch)
Red Syenite Dikes
Vermiculite Mine (MRDS - 10013422)

Latitude: 38°16'22"N
Longitude: 105°31'47"W
Decimal Degree (lat, lon): 38.272777777778,-105.52972222222
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 Ba C Ca Ce Cl Cu F Fe H K Mg Na Nb Ni O P Pb S Si Sr Ta Th Ti Zn Zr 

Elements from minerals reported directly at this locality: Al C Ca Fe H K Mg Na O S Si Sr Ti Zn 

Structural Groups for minerals in this locality: 
AmphiboleAnalcimeAncyliteApatiteAragoniteBaryteBrookiteCalciteCancrinite-sodaliteChalcopyrite
ClayColumbiteCorundumDiasporeFeldsparFluoriteLepidocrociteMarcasiteMicaMonazite
NatroliteNickelineNoneNot in a structural groupPerovskitePyritePyroxeneQuartzRhabdophaneRocksalt
RutileSmectite-vermiculiteSodaliteSphaleriteSpinelTitaniteTridymiteVivianiteZircon

61 IMA Minerals at location:
Actinolite  (*)Aegirine  (*)Aegirine-augite  (*)Albite  (*)Analcime  (*)
Anatase  (*)Ancylite-(Ce)  (*)Ankerite  (*)Annabergite  (*)Anorthite  (*)
Augite  (*)Baryte  (*)Bornite  (*)Brockite  (*)Brookite  (*)
Calcite  (*)Celestine  (*)Chalcocite  (*)Chalcopyrite  (*)Dolomite  (*)
Edenite  (*)Fersmite  (*)Fluorapatite  (*)Fluorite  (*)Galena  (*)
Goethite  (*)Hematite  (*)Ilmenite  (*)Lamprophyllite  (*)Lepidocrocite  (*)
Lueshite  (*)Magnesio-riebeckite  (*)Magnetite  (*)Marcasite  (*)Maucherite  (*)
Microcline  (*)Monazite-(Ce)  (*)Muscovite  (*)Natrolite  (*)Natroniobite  (*)
Nepheline  (*)Nickeline  (*)Perovskite  (*)Phlogopite  (*)Pyrite  (*)
Pyrrhotite  (*)Quartz  (*)Richterite  (*)Riebeckite  (*)Rutile  (*)
Siderite  (*)Sodalite  (*)Sphalerite  (*)Strontianite  (*)Thorianite  (*)
Thorite  (*)Titanite  (*)Tremolite  (*)Vermiculite  (*)Winchite  (*)
Zircon  (*)
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)255155111884033419
Aegirine  (*)PyroxeneNaFe3+Si2O65515512188402,1884031022
Aegirine-augite  (*)Pyroxene(Ca,Na)(Fe3+,Mg,Fe2+)Si2O65515510286
Albite  (*)FeldsparNa(AlSi3O8)55155111884028803
Analcime  (*)AnalcimeNa(AlSi2O6)·H2O55155111884031627
Anatase  (*)Not in a structural groupTiO25515512188402,1884032162
Ancylite-(Ce)  (*)AncyliteCeSr(CO3)2(OH)·H2O551551118840392
Ankerite  (*)NoneCa(Fe2+,Mg)(CO3)255155111884033092
Annabergite  (*)VivianiteNi3(AsO4)2·8H2O5515511188399445
Anorthite  (*)FeldsparCa(Al2Si2O8)55155101036
Augite  (*)Pyroxene(Ca,Mg,Fe)2Si2O655155111884032060
Baryte  (*)BaryteBa(SO4)5515514188399,188400,188402,18840311547
Bornite  (*)NoneCu5FeS45515512188399,1884035516
Brockite  (*)Rhabdophane(Ca,Th,Ce)(PO4)·H2O551551118840248
Brookite  (*)BrookiteTiO25515511188403700
Calcite  (*)CalciteCa(CO3)5515515188399,188400,188401,188402,18840327770
Celestine  (*)BaryteSr(SO4)55155101252
Chalcocite  (*)NoneCu2S55155111883995707
Chalcopyrite  (*)ChalcopyriteCuFeS25515512188399,18840227198
Dolomite  (*)NoneCaMg(CO3)25515514188400,188401,188402,1884039895
Edenite  (*)AmphiboleNaCa2Mg5(Si7Al)O22(OH)25515510160
Fersmite  (*)ColumbiteCaNb2O6551551118840383
Fluorapatite  (*)ApatiteCa5(PO4)3F55155111884022740
Fluorite  (*)FluoriteCaF25515512188402,1884039617
Galena  (*)RocksaltPbS5515512188401,18840224243
Goethite  (*)DiasporeFeO(OH)5515512188401,1884027437
Hematite  (*)CorundumFe2O35515512188401,18840214640
Ilmenite  (*)CorundumFe2+Ti4+O355155111884035433
Lamprophyllite  (*)None(SrNa)Ti2Na3Ti(Si2O7)2O2(OH)2551551063
Lepidocrocite  (*)LepidocrociteFe3+O(OH)5515511188402581
Lueshite  (*)PerovskiteNaNbO3551551118840316
Magnesio-riebeckite  (*)Amphibole   Na2(Mg3Fe3+2)Si8O22(OH)2551551118840393
Magnetite  (*)SpinelFe2+Fe3+2O45515512188401,18840314899
Marcasite  (*)MarcasiteFeS255155105674
Maucherite  (*)NoneNi11As85515511188399161
Microcline  (*)FeldsparK(AlSi3O8)55155111884014924
Monazite-(Ce)  (*)MonaziteCe(PO4)5515511188403945
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2551551017380
Natrolite  (*)NatroliteNa2(Si3Al2)O10·2H2O55155111884031236
Natroniobite  (*)PerovskiteNaNbO355155111884035
Nepheline  (*)TridymiteNa3K(Al4Si4O16)5515510884
Nickeline  (*)NickelineNiAs5515512188399,188403633
Perovskite  (*)PerovskiteCaTiO35515511188403495
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)25515512188399,1884032273
Pyrite  (*)PyriteFeS25515513188399,188402,18840339462
Pyrrhotite  (*)NickelineFe7S855155111884039056
Quartz  (*)QuartzSiO25515513188399,188402,18840361156
Richterite  (*)AmphiboleNa(NaCa)Mg5Si8O22(OH)25515510148
Riebeckite  (*)Amphibole   Na2(Fe2+3Fe3+2)Si8O22(OH)25515511188403375
Rutile  (*)RutileTiO25515512188402,1884035614
Siderite  (*)CalciteFe(CO3)55155106417
Sodalite  (*)Cancrinite-sodalite SodaliteNa4(Si3Al3)O12Cl5515511188403444
Sphalerite  (*)SphaleriteZnS551551021482
Strontianite  (*)AragoniteSr(CO3)5515512188400,188403589
Thorianite  (*)FluoriteThO25515511188403236
Thorite  (*)ZirconTh(SiO4)55155111884021006
Titanite  (*)TitaniteCaTi(SiO4)O55155104899
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)255155111884032562
Vermiculite  (*)Clay Smectite-vermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4·8H2O5515512188400,188403652
Winchite  (*)Amphibole   (NaCa)(Mg4Al)Si8O22(OH)2551551051
Zircon  (*)ZirconZr(SiO4)55155111884025251


Locality Notes from all Ages at Locality:
Age IDLocality Notes
Jen_0000904MAGMATIC STYLE: Dykes and small plug (Pine Creek). ASSOCIATED SILICATE ROCKS: Pyroxenite, gabbro, nepheline syenite, lamprophyre, fenite.


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
Jen_0000904551551551K-Ar riebeckite   Riebeckite  24296Gem Park Complex, Fremont Co., Colorado, USAGem ParkWoolley and Kjarsgaard (2008)10.4095/225115GSCOF5796 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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