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:
Kodiak Island Borough, Alaska, USA

Oldest recorded age at locality: 135
Youngest recorded age at locality: 135

mindat Locality ID: 203086
mindat URL: http://www.mindat.org/loc-203086.html

Tectonic Settings:

Total number of sublocalities beneath "Kodiak Island Borough, Alaska, USA": 73
Total number of bottom-level sublocalities: 70

Number of Child Localities: 3
Child Localities:
Alaska Peninsula District
Bristol Bay District
Kodiak District

Latitude: 57°43'45"N
Longitude: 154°52'6"W
Decimal Degree (lat, lon): 57.729166666667,-154.86833333333

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 Au Ba C Ca Cr Cu Fe H K Mo O Pb S Sb Si W Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmorphousArsenopyriteBaryteCalciteChalcopyriteClayCopperMicaMolybdeniteNickeline
NonePyriteQuartzRocksaltScheeliteSphaleriteSpinelStibniteTetrahedrite

19 IMA Minerals at location:
Arsenopyrite  (*)Baryte  (*)Bornite  (*)Calcite  (*)Chalcopyrite  (*)
Chromite  (*)Galena  (*)Gold  (*)Jordisite  (*)Magnetite  (*)
Molybdenite  (*)Muscovite  (*)Pyrite  (*)Pyrrhotite  (*)Quartz  (*)
Scheelite  (*)Sphalerite  (*)Stibnite  (*)Tetrahedrite-(Zn)  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Arsenopyrite  (*)ArsenopyriteFeAsS10130826,130828,130829,130831,130833,130834,130853,130869,130870,1308749052
Baryte  (*)BaryteBa(SO4)113081011547
Bornite  (*)NoneCu5FeS411308525516
Calcite  (*)CalciteCa(CO3)2130859,13086327770
Chalcopyrite  (*)ChalcopyriteCuFeS212130805,130820,130831,130833,130839,130840,130852,130858,130859,130863,130869,13087427198
Chromite  (*)SpinelFe2+Cr2O413513518130836,130837,130838,130839,130841,130842,130843,130844,130845,130846,130847,130848,130849,130850,130851,130856,130861,1308653902
Galena  (*)RocksaltPbS6130803,130814,130829,130859,130863,13087424243
Gold  (*)CopperAu31130803,130804,130807,130811,130814,130816,130818,130824,130825,130826,130827,130828,130829,130830,130832,130834,130835,130853,130854,130855,130859,130860,130862,130863,130864,130867,130870,130871,130872,130873,13087430554
Jordisite  (*)AmorphousMoS21130818102
Magnetite  (*)SpinelFe2+Fe3+2O4113081414899
Molybdenite  (*)MolybdeniteMoS22130803,1308145800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22130828,13086317380
Pyrite  (*)PyriteFeS219130810,130814,130815,130816,130818,130821,130824,130825,130826,130828,130829,130831,130833,130834,130835,130858,130859,130863,13087439462
Pyrrhotite  (*)NickelineFe7S89130828,130835,130839,130840,130852,130858,130863,130869,1308749056
Quartz  (*)QuartzSiO224130803,130814,130815,130816,130818,130821,130824,130825,130826,130827,130828,130829,130834,130835,130853,130854,130855,130859,130863,130869,130870,130871,130873,13087461156
Scheelite  (*)ScheeliteCa(WO4)2130831,1308334894
Sphalerite  (*)SphaleriteZnS3130810,130821,13087421482
Stibnite  (*)StibniteSb2S33130803,130814,1308743418
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S1311308145317



8 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
podchrome-00918135135Late Jurassic-Cretaceous       Cr197880Halibut Bay 41 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USAHalibut Bay 41Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00919135135Late Jurassic-Cretaceous       Cr197882Halibut Bay 43 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USAHalibut Bay 43Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00920135135Late Jurassic-Cretaceous       Cr197883Halibut Bay 44 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USAHalibut Bay 44Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00921135135Late Jurassic-Cretaceous       Cr197884Halibut Bay 45 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USAHalibut Bay 45Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00923135135Late Jurassic-Cretaceous       Cr197885Halibut Bay 46 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USAHalibut Bay 46Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00924135135Late Jurassic-Cretaceous       Cr197887Halibut Bay 48 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USAHalibut Bay 48Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00925135135Late Jurassic-Cretaceous       Cr197889Halibut Bay 50 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USAHalibut Bay 50Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00926135135Late Jurassic-Cretaceous       Cr197890Halibut Bay 51 Occurrence, Kodiak District, Kodiak Island Borough, Alaska, USAHalibut Bay 51Moiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


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