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:
Ely-Hoyt Lakes Area, St. Louis Co., Minnesota, USA

Oldest recorded age at locality: 1214.42
Youngest recorded age at locality: 1104.42

mindat Locality ID: 167664
mindat URL: http://www.mindat.org/loc-167664.html

Tectonic Settings:

Total number of sublocalities beneath "Ely-Hoyt Lakes Area, St. Louis Co., Minnesota, USA": 6
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Birch Lake Deposit
Dunka Pit (Dunka Road Deposit; North Met Deposit)
Dunka River Area Prospect
Mesaba Deposit (Minnamax Deposit; Babbitt Deposit; Babbitt Lake Deposit; Amax Underground Mine)
Minnamax Exploration Shaft Prospect (Amax Exploration Inc)
Serpentine Deposit

Latitude: 47°41'25"N
Longitude: 91°52'12"W
Decimal Degree (lat, lon): 47.690277777778,-91.87
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 Au Bi C Ca Co Cr Cu Fe H Mg Ni O Pb Pd Pt S Si Sn Te Ti Zn Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleBaddeleyiteCalciteChalcopyriteClayClinozoisiteCobaltiteCopperCorundumCovellite
CubaniteDigeniteEpidoteMilleriteNickelineNonePentlanditePrehnitePyritePyroxene
RocksaltSerpentineSphaleriteSpinelValleriiteWurtziteZircon

46 IMA Minerals at location:
Actinolite  (*)Altaite  (*)Augite  (*)Baddeleyite  (*)Bornite  (*)
Cabriite  (*)Calcite  (*)Chalcocite  (*)Chalcopyrite  (*)Chromite  (*)
Chrysotile  (*)Cobaltite  (*)Copper  (*)Covellite  (*)Cubanite  (*)
Digenite  (*)Epidote  (*)Froodite  (*)Galena  (*)Godlevskite  (*)
Gold  (*)Graphite  (*)Greenalite  (*)Haycockite  (*)Heazlewoodite  (*)
Ilmenite  (*)Mackinawite  (*)Magnetite  (*)Maucherite  (*)Millerite  (*)
Mooihoekite  (*)Nickeline  (*)Gersdorffite-Pa3  (*)Pentlandite  (*)Prehnite  (*)
Pyrite  (*)Pyrrhotite  (*)Silver  (*)Sperrylite  (*)Sphalerite  (*)
Spinel  (*)Talnakhite  (*)Troilite  (*)Valleriite  (*)Violarite  (*)
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)212236573419
Altaite  (*)RocksaltPbTe1223654489
Augite  (*)Pyroxene(Ca,Mg,Fe)2Si2O62223655,2236572060
Baddeleyite  (*)BaddeleyiteZrO21223657238
Bornite  (*)NoneCu5FeS43223654,223655,2236575516
Cabriite  (*)NonePd2CuSn122365712
Calcite  (*)CalciteCa(CO3)122365727770
Chalcocite  (*)NoneCu2S2223654,2236575707
Chalcopyrite  (*)ChalcopyriteCuFeS23223654,223655,22365727198
Chromite  (*)SpinelFe2+Cr2O412236543902
Chrysotile  (*)Serpentine ClayMg3Si2O5(OH)41223657951
Cobaltite  (*)CobaltiteCoAsS1223655966
Copper  (*)CopperCu12236543846
Covellite  (*)CovelliteCuS12236574165
Cubanite  (*)Cubanite WurtziteCuFe2S33223654,223655,223657802
Digenite  (*)DigeniteCu1.8S12236541027
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)12236578173
Froodite  (*)NonePdBi22223655,22365762
Galena  (*)RocksaltPbS2223654,22365524243
Godlevskite  (*)Pentlandite(Ni,Fe)9S8122365740
Gold  (*)CopperAu122365430554
Graphite  (*)NoneC12236572812
Greenalite  (*)Clay Serpentine(Fe2+,Fe3+)2-3Si2O5(OH)4122365761
Haycockite  (*)ChalcopyriteCu4Fe5S8122365412
Heazlewoodite  (*)NoneNi3S22223654,223657205
Ilmenite  (*)CorundumFe2+Ti4+O32223654,2236575433
Mackinawite  (*)None(Fe,Ni)1+xS (x = 0-0.07)3223654,223655,223657451
Magnetite  (*)SpinelFe2+Fe3+2O42223654,22365714899
Maucherite  (*)NoneNi11As82223655,223657161
Millerite  (*)MilleriteNiS2223654,2236551066
Mooihoekite  (*)ChalcopyriteCu9Fe9S16122365420
Nickeline  (*)NickelineNiAs2223655,223657633
Gersdorffite-Pa3  (*)PyriteNiAsS1223655767
Pentlandite  (*)Pentlandite(Ni,Fe)9S83223654,223655,2236571512
Prehnite  (*)PrehniteCa2Al(Si3Al)O10(OH)212236571898
Pyrite  (*)PyriteFeS2122365539462
Pyrrhotite  (*)NickelineFe7S83223654,223655,2236579056
Silver  (*)CopperAg2223654,2236575186
Sperrylite  (*)PyritePtAs21223657337
Sphalerite  (*)SphaleriteZnS3223654,223655,22365721482
Spinel  (*)SpinelMgAl2O42223654,2236571934
Talnakhite  (*)ChalcopyriteCu9Fe8S163223654,223655,22365735
Troilite  (*)NoneFeS2223654,2236571044
Valleriite  (*)Valleriite2[(Fe,Cu)S]·1.53[(Mg,Al)(OH)2]1223655237
Violarite  (*)SpinelFeNi2S41223655380
Zircon  (*)ZirconZr(SiO4)12236575251


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
USGS-Rb-Sr-013431214.421104.421159.42±55Rb-Srage of intrusionbiotite     167437Serpentine Deposit, Ely-Hoyt Lakes Area, St. Louis Co., Minnesota, USA USGS-Rb-Sr USGS-Rb-Sr 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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