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:
Tok District, Southeast Fairbanks Census Area, Alaska, USA

Oldest recorded age at locality: 390
Youngest recorded age at locality: 360

mindat Locality ID: 203138
mindat URL: http://www.mindat.org/loc-203138.html

Tectonic Settings:

Total number of sublocalities beneath "Tok District, Southeast Fairbanks Census Area, Alaska, USA": 60
Total number of bottom-level sublocalities: 60

Number of Child Localities: 60
Child Localities:
Big Mac Occurrence
Cascade Occurrence
CC Barite Occurrence
CC South Occurrence
DD North Prospect
DD South Prospect
DDX Occurrence
DDY Occurrence
DG Prospect
DW East Occurrence
DW Prospect
Epidote Glacier Occurrence
Goat Occurrence
LBB Occurrence
Lo Goat Occurrence
LP Prospect
LPH Prospect
LPH South Occurrence
LPP Occurrence
LZ East Prospect
LZ Prospect
MB Occurrence
MID Prospect
Noah Prospect
Nunatak Prospect
PG East Occurrence
PG Northeast Occurrence
PG Occurrence
PG Southeast Occurrence
PG West Occurrence
PGX Prospect
PP Prospect
PP2 Prospect
RC East Prospect
RC Occurrence
RC West Occurrence
Robertson River Prospect
Rum North Prospect
Rum South Prospect
SB Occurrence
SC East; Super Cub East Occurrence
Super Cub Ridge Occurrence
TA Occurrence
Tiger Paw Occurrence
Tok Antimony; Stibnite; A Lucky Leak; Gamblin; Caulk Mine
Tok Prospect
Trio East Occurrence
Trio Occurrence
Trio West Occurrence
Unnamed Occurrence (ARDF - MH244; South Side Of The West Fork Robertson River Valley)
Unnamed Occurrence (ARDF - MH245; Near The Mouth Of Rock Candy Creek)
Unnamed Occurrence (ARDF - MH248; Southwest Of The Head Of Snowslide Creek)
Unnamed Occurrence (ARDF - MH249; On Rock Candy Creek)
Unnamed Occurrence (ARDF - MH253; Near Peak 7360)
Unnamed Occurrence (ARDF - MH256; North Of Kimball Glacier)
Unnamed Occurrence (ARDF - MH257; Northeast Of Peak 7360)
Unnamed Occurrence (ARDF - MH264; Southeast Of Peak 7057)
UPP Occurrence
Val Prospect
Zygoat Occurrence

Latitude: 63°15'40"N
Longitude: 144°15'7"W
Decimal Degree (lat, lon): 63.261111111111,-144.25194444444

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 Cu Fe H K Mg O Pb S Sb Si Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleAndalusiteArsenopyriteBaryteCalciteChalcanthiteChalcopyriteClayClinozoisiteCopper
EpidoteGypsumKaoliniteMarcasiteMicaNickelineNonePyriteQuartzRocksalt
SphaleriteSpinelStibniteTetrahedrite

24 IMA Minerals at location:
Actinolite  (*)Andalusite  (*)Ankerite  (*)Arsenopyrite  (*)Baryte  (*)
Calcite  (*)Chalcanthite  (*)Chalcopyrite  (*)Dolomite  (*)Epidote  (*)
Galena  (*)Gold  (*)Graphite  (*)Gypsum  (*)Kaolinite  (*)
Magnetite  (*)Marcasite  (*)Muscovite  (*)Pyrite  (*)Pyrrhotite  (*)
Quartz  (*)Sphalerite  (*)Stibnite  (*)Tennantite-(Fe)  (*)
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)23903902134045,1340553419
Andalusite  (*)AndalusiteAl2SiO511340531310
Ankerite  (*)NoneCa(Fe2+,Mg)(CO3)211340363092
Arsenopyrite  (*)ArsenopyriteFeAsS39036027134011,134012,134014,134016,134017,134022,134023,134024,134026,134027,134029,134031,134037,134038,134039,134040,134041,134044,134045,134047,134054,134055,134058,134060,134061,134062,1340659052
Baryte  (*)BaryteBa(SO4)113400911547
Calcite  (*)CalciteCa(CO3)39036023134008,134011,134012,134013,134014,134020,134025,134026,134027,134028,134032,134035,134037,134038,134049,134050,134051,134056,134058,134060,134062,134063,13406427770
Chalcanthite  (*)ChalcanthiteCu(SO4)·5H2O1134023925
Chalcopyrite  (*)ChalcopyriteCuFeS239036048134008,134009,134010,134011,134012,134013,134014,134015,134016,134017,134020,134022,134023,134024,134025,134026,134027,134028,134029,134031,134032,134033,134034,134035,134036,134037,134038,134039,134041,134042,134044,134045,134046,134047,134049,134050,134054,134055,134056,134057,134058,134059,134060,134061,134062,134063,134064,13406527198
Dolomite  (*)NoneCaMg(CO3)28134008,134020,134025,134026,134027,134038,134063,1340649895
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)11340188173
Galena  (*)RocksaltPbS39036047134008,134009,134010,134011,134012,134013,134014,134016,134017,134020,134022,134023,134024,134025,134026,134027,134028,134029,134031,134033,134034,134036,134037,134038,134039,134040,134041,134042,134044,134045,134046,134047,134049,134050,134053,134054,134055,134056,134057,134058,134059,134060,134061,134062,134063,134064,13406524243
Gold  (*)CopperAu39036018134011,134012,134016,134017,134022,134029,134031,134034,134037,134039,134043,134044,134045,134047,134052,134054,134055,13406530554
Graphite  (*)NoneC8134008,134020,134025,134026,134027,134038,134063,1340642812
Gypsum  (*)GypsumCa(SO4)·2H2O3903603134011,134012,1340376890
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)411340535591
Magnetite  (*)SpinelFe2+Fe3+2O439036018134011,134012,134016,134017,134022,134023,134024,134029,134031,134037,134039,134044,134045,134047,134048,134054,134055,13406514899
Marcasite  (*)MarcasiteFeS23134026,134027,1340385674
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)239036038134008,134009,134010,134011,134012,134013,134014,134015,134016,134017,134020,134022,134023,134024,134025,134026,134027,134028,134029,134031,134032,134033,134035,134037,134038,134039,134042,134046,134048,134049,134050,134051,134053,134057,134059,134063,134064,13406517380
Pyrite  (*)PyriteFeS239036054134007,134008,134009,134010,134011,134012,134013,134014,134015,134016,134017,134019,134020,134021,134022,134023,134024,134025,134026,134027,134028,134029,134031,134032,134033,134035,134036,134037,134038,134039,134040,134041,134042,134044,134045,134046,134047,134049,134050,134051,134053,134054,134055,134056,134057,134058,134059,134060,134061,134062,134063,134064,134065,13406639462
Pyrrhotite  (*)NickelineFe7S839036032134011,134012,134013,134015,134016,134017,134022,134024,134026,134027,134029,134031,134032,134033,134035,134036,134037,134038,134039,134044,134045,134046,134047,134053,134054,134055,134056,134058,134060,134061,134062,1340659056
Quartz  (*)QuartzSiO239036054134007,134008,134009,134010,134011,134012,134013,134014,134015,134016,134017,134019,134020,134021,134022,134023,134024,134025,134026,134027,134028,134029,134031,134032,134033,134035,134036,134037,134038,134039,134040,134041,134042,134044,134045,134046,134047,134048,134049,134050,134051,134053,134054,134056,134057,134058,134059,134060,134061,134062,134063,134064,134065,13406661156
Sphalerite  (*)SphaleriteZnS39036048134008,134010,134011,134012,134013,134014,134015,134016,134017,134020,134022,134023,134024,134025,134026,134027,134028,134029,134031,134033,134034,134036,134037,134038,134039,134040,134041,134042,134044,134045,134046,134047,134048,134049,134050,134053,134054,134055,134056,134057,134058,134059,134060,134061,134062,134063,134064,13406521482
Stibnite  (*)StibniteSb2S37134040,134041,134051,134058,134060,134061,1340623418
Tennantite-(Fe)  (*)TetrahedriteCu6(Cu4Fe2)As4S133134026,134027,1340381803



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-00986390390Devonian       S197159DD North Prospect, Tok District, Southeast Fairbanks Census Area, Alaska, USADD NorthMoiser et al. (2009) USGSOFR2009_1034 
vms-00987360360Devonian       S197160DD South Prospect, Tok District, Southeast Fairbanks Census Area, Alaska, USADD SouthMoiser et al. (2009) USGSOFR2009_1034 
vms-01006390390Devonian       S200428Trio Occurrence, Tok District, Southeast Fairbanks Census Area, Alaska, USATrioMoiser et al. (2009) USGSOFR2009_1034 


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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