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:
Western Margin Duluth Complex, St. Louis Co., Minnesota, USA

Oldest recorded age at locality: 1100
Youngest recorded age at locality: 1100

mindat Locality ID: 167667
mindat URL: http://www.mindat.org/loc-167667.html

Tectonic Settings:

Total number of sublocalities beneath "Western Margin Duluth Complex, St. Louis Co., Minnesota, USA": 15
Total number of bottom-level sublocalities: 15

Number of Child Localities: 15
Child Localities:
Boulder Lake--Central
Boulder Lake--North
Boulder Lake--South
Longear
Longnose
Partridge River Area Occurrence
Section 17 Deposit
Section 22 Deposit
Section 34 Deposit
Skibo Deposit
Skibo South Deposit
Water Hen
Water Hen Occurrence
Wet Legs Deposit
Wyman Creek Prospect

Latitude: 47°24'8"N
Longitude: 92°5'31"W
Decimal Degree (lat, lon): 47.402222222222,-92.091944444444
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 As Bi C Ca Co Cu Fe H K Mg Ni O Pb Pd Pt S Sb Si Te Ti U Zn 

Elements from minerals reported directly at this locality: Ca H O Si U 

Structural Groups for minerals in this locality: 
AmphiboleArsenicBerylChalcopyriteClayCobaltiteCopperCorundumCovelliteCubanite
DigeniteFluoriteLöllingiteMarcasiteMicaNickelineNoneOlivinePentlanditePrehnite
PyritePyroxeneRocksaltSphaleriteSpinelTetradymiteWurtzite

35 IMA Minerals at location:
Actinolite  (*)Augite  (*)Bismuth  (*)Bornite  (*)Chalcopyrite  (*)
Cobaltite  (*)Cordierite  (*)Covellite  (*)Cubanite  (*)Digenite  (*)
Forsterite  (*)Galena  (*)Graphite  (*)Ilmenite  (*)Löllingite  (*)
Magnetite  (*)Marcasite  (*)Maucherite  (*)Muscovite  (*)Nickeline  (*)
Gersdorffite-Pa3  (*)Pentlandite  (*)Prehnite  (*)Pyrite  (*)Pyrrhotite  (*)
Rammelsbergite  (*)Safflorite  (*)Silver  (*)Sperrylite  (*)Sphalerite  (*)
Stibiopalladinite  (*)Tetradymite  (*)Uraninite  (*)Uranophane-α  (*)Yarrowite  (*)
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)21100110012240733419
Augite  (*)Pyroxene(Ca,Mg,Fe)2Si2O61100110012240822060
Bismuth  (*)ArsenicBi1100110012240811966
Bornite  (*)NoneCu5FeS4110011003224074,224082,2240835516
Chalcopyrite  (*)ChalcopyriteCuFeS2110011004224074,224081,224082,22408327198
Cobaltite  (*)CobaltiteCoAsS110011001224082966
Cordierite  (*)BerylMg2Al4Si5O181100110012240811008
Covellite  (*)CovelliteCuS1100110012240824165
Cubanite  (*)Cubanite WurtziteCuFe2S3110011002224082,224083802
Digenite  (*)DigeniteCu1.8S1100110012240821027
Forsterite  (*)OlivineMg2(SiO4)1100110012240731188
Galena  (*)RocksaltPbS11001100122408124243
Graphite  (*)NoneC110011002224081,2240822812
Ilmenite  (*)CorundumFe2+Ti4+O31100110010224069,224070,224071,224072,224073,224075,224076,224077,224078,2240805433
Löllingite  (*)LöllingiteFeAs2110011001224082762
Magnetite  (*)SpinelFe2+Fe3+2O41100110010224069,224070,224071,224072,224073,224075,224076,224077,224078,22408014899
Marcasite  (*)MarcasiteFeS21100110012240815674
Maucherite  (*)NoneNi11As8110011001224082161
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)211001100122408217380
Nickeline  (*)NickelineNiAs110011002224081,224082633
Gersdorffite-Pa3  (*)PyriteNiAsS110011001224082767
Pentlandite  (*)Pentlandite(Ni,Fe)9S8110011003224081,224082,2240831512
Prehnite  (*)PrehniteCa2Al(Si3Al)O10(OH)21100110012240821898
Pyrite  (*)PyriteFeS211001100122408139462
Pyrrhotite  (*)NickelineFe7S8110011004224074,224081,224082,2240839056
Rammelsbergite  (*)LöllingiteNiAs2110011001224082233
Safflorite  (*)LöllingiteCoAs2110011001224082317
Silver  (*)CopperAg1100110012240815186
Sperrylite  (*)PyritePtAs2110011001224082337
Sphalerite  (*)SphaleriteZnS11001100122408121482
Stibiopalladinite  (*)NonePd5Sb211001100122408275
Tetradymite  (*)TetradymiteBi2Te2S110011001224081510
Uraninite  (*)FluoriteUO21100110002718
Uranophane-α  (*)NoneCa(UO2)2(SiO3OH)2·5H2O110011000890
Yarrowite  (*)NoneCu9S811001100122408270


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
EG105_1057_010110011001100       Ni, Cu, Pt, Pd, Rh, Ir, Os, Ru167667Western Margin Duluth Complex, St. Louis Co., Minnesota, USADuluthBegg et al. (2010)10.2113/econgeo.105.6.1057EG105_1057 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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