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:
Gemmell Township, Thunder Bay District, Ontario, Canada

Oldest recorded age at locality: 4000
Youngest recorded age at locality: 2500

mindat Locality ID: 254958
mindat URL: http://www.mindat.org/loc-254958.html

Tectonic Settings:

Total number of sublocalities beneath "Gemmell Township, Thunder Bay District, Ontario, Canada": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Geco Mine
Willroy Mine

Latitude: 49°9'21"N
Longitude: 85°48'26"W
Decimal Degree (lat, lon): 49.155833333333,-85.807222222222
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: Ag Al C Ca Cl Cu Fe H K Mg Mn Na O Pb S Si Sn Ti Zn Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AcanthiteAmphiboleBerylCalciteChalcopyriteChloriteClayClinozoisiteCorundumEpidote
EttringiteFeldsparGarnetMicaNickelineNoneNot in a structural groupPyritePyrosmaliteQuartz
RocksaltRutileSphaleriteSpinelStauroliteTitaniteWollastoniteZircon

38 IMA Minerals at location:
Acanthite  (*)Actinolite  (*)Andradite  (*)Anthophyllite  (*)Calcite  (*)
Cassiterite  (*)Chalcopyrite  (*)Cordierite  (*)Corundum  (*)Epidote  (*)
Ferro-actinolite  (*)Ferro-edenite  (*)Ferronigerite-2N1S  (*)Gahnite  (*)Galena  (*)
Gedrite  (*)Hastingsite  (*)Hercynite  (*)Ilmenite  (*)Magnetite  (*)
Microcline  (*)Muscovite  (*)Phlogopite  (*)Pyrite  (*)Pyrosmalite-(Fe)  (*)
Pyrosmalite-(Mn)  (*)Pyrrhotite  (*)Quartz  (*)Rutile  (*)Sillimanite  (*)
Spessartine  (*)Sphalerite  (*)Staurolite  (*)Sudoite  (*)Thaumasite  (*)
Titanite  (*)Wollastonite  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Acanthite  (*)AcanthiteAg2S40002500233324,333252793
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)240002500233324,333253419
Andradite  (*)GarnetCa3Fe3+2(SiO4)3272027201333241534
Anthophyllite  (*)Amphibole   Mg2Mg5Si8O22(OH)227202720133324718
Calcite  (*)CalciteCa(CO3)40002500233324,3332527770
Cassiterite  (*)RutileSnO2272027201333245171
Chalcopyrite  (*)ChalcopyriteCuFeS240002500233324,3332527198
Cordierite  (*)BerylMg2Al4Si5O18272027201333241008
Corundum  (*)CorundumAl2O3272027201333241797
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)40002500233324,333258173
Ferro-actinolite  (*)Amphibole   Ca2(Mg2.5-0.0Fe2+2.5-5.0)Si8O22(OH)227202720133324129
Ferro-edenite  (*)AmphiboleNaCa2Fe2+5(Si7Al)O22(OH)22720272013332457
Ferronigerite-2N1S  (*)None(Al,Fe,Zn)2(Al,Sn)6O11(OH)2720272013332414
Gahnite  (*)SpinelZnAl2O427202720133324445
Galena  (*)RocksaltPbS40002500233324,3332524243
Gedrite  (*)Amphibole   Mg2(Mg3Al2)(Si6Al2)O22(OH)227202720133324178
Hastingsite  (*)AmphiboleNaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)227202720133324209
Hercynite  (*)SpinelFe2+Al2O427202720133324407
Ilmenite  (*)CorundumFe2+Ti4+O3272027201333245433
Magnetite  (*)SpinelFe2+Fe3+2O440002500233324,3332514899
Microcline  (*)FeldsparK(AlSi3O8)272027201333244924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22720272013332417380
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)2272027201333242273
Pyrite  (*)PyriteFeS240002500233324,3332539462
Pyrosmalite-(Fe)  (*)Pyrosmalite ClayFe2+8Si6O15(OH)1040002500233324,3332538
Pyrosmalite-(Mn)  (*)Pyrosmalite ClayMn2+8Si6O15(OH,Cl)102720272013332425
Pyrrhotite  (*)NickelineFe7S840002500233324,333259056
Quartz  (*)QuartzSiO240002500233324,3332561156
Rutile  (*)RutileTiO2272027201333245614
Sillimanite  (*)Not in a structural groupAl2SiO5272027201333241516
Spessartine  (*)GarnetMn2+3Al2(SiO4)3272027201333241214
Sphalerite  (*)SphaleriteZnS40002500233324,3332521482
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)27202720133324978
Sudoite  (*)Chlorite ClayMg2Al3(Si3Al)O10(OH)82720272013332451
Thaumasite  (*)EttringiteCa3Si(OH)6(CO3)(SO4)·12H2O27202720133324183
Titanite  (*)TitaniteCaTi(SiO4)O272027201333244899
Wollastonite  (*)WollastoniteCaSiO3400025001333251247
Zircon  (*)ZirconZr(SiO4)272027201333245251


3 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
vms-0024727202720Archean       S6771Geco Mine, Gemmell Township, Thunder Bay District, Ontario, CanadaGecoMoiser et al. (2009) USGSOFR2009_1034 
vms-0026940002500Archean        244258Willroy Mine, Gemmell Township, Thunder Bay District, Ontario, CanadaWillroy No. 1Moiser et al. (2009) USGSOFR2009-1034 
vms-0027040002500Archean        244258Willroy Mine, Gemmell Township, Thunder Bay District, Ontario, CanadaWillroy No. 3Moiser et al. (2009) USGSOFR2009-1034 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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