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:
McGrath District, Bethel Census Area, Alaska, USA


mindat Locality ID: 203062
mindat URL: http://www.mindat.org/loc-203062.html

Tectonic Settings:

Total number of sublocalities beneath "McGrath District, Bethel Census Area, Alaska, USA": 42
Total number of bottom-level sublocalities: 42

Number of Child Localities: 42
Child Localities:
Anchor Occurrences
Breccia Occurrence (south Of Snowcap Mountain)
Cairn Mountain Occurrences
Ellie's Gold Occurrence
Gagaryah Occurrence
Gagaryah River Occurrences
Jimmy Lake Occurrence
Nunatak Occurrence (south Of Snowcap Mountain)
Only Occurrences
Post Lake Prospect
Post River Pluton Prospect
Sparrevohn Occurrences
Styx River Occurrence
Terra Cotta Mountains Occurrence
Terra Prospect
Three Cub Occurrence
Unnamed Occurrence (ARDF - LH006; Near Swift River)
Unnamed Occurrence (ARDF - LH007; Near Swift River)
Unnamed Occurrence (ARDF - LH011; Head Of Hartman River)
Unnamed Occurrence (ARDF - LH013; Southeast Of Jimmy Lake)
Unnamed Occurrence (ARDF - LH014; Near Styx River)
Unnamed Occurrence (ARDF - LH015; Head Of Hartman River)
Unnamed Occurrence (ARDF - LH016; Head Of Hartman River)
Unnamed Occurrence (ARDF - LH017; Head Of Hartman River)
Unnamed Occurrence (ARDF - LH018; Near Styx River)
Unnamed Occurrence (ARDF - LH019; Head Of South Fork Kuskokwim River)
Unnamed Occurrence (ARDF - LH021; Upper Styx River)
Unnamed Occurrence (ARDF - LH022; Head Of South Fork Kuskokwim River)
Unnamed Occurrence (ARDF - LH024; West Of Snowcap Mountain)
Unnamed Occurrence (ARDF - MG072; Near West Fork Of Post River)
Unnamed Occurrence (ARDF - MG074; East Of Headwaters Of Windy Fork)
Unnamed Occurrence (ARDF - MG079; On Tributary To Dalzell Creek)
Unnamed Occurrence (ARDF - MG080; On Tributary Valley To Happy River)
Unnamed Occurrence (ARDF - MG082; In Terra Cotta Mountains)
Unnamed Occurrence (ARDF - MG083; Near Post River)
Unnamed Occurrence (ARDF - MG085; Near Tributary To South Fork Of Kuskokwim River)
Unnamed Occurrence (ARDF - MG086; At Head Of Tributary To Post River)
Unnamed Occurrence (ARDF - MG087; On Tributary To South Fork Of Kuskokwim River)
Unnamed Occurrence (ARDF - MG088; In Saddle Between Post River And South Fork)
Unnamed Occurrences (ARDF - LH023; Head Of Kuskokwim River)
Unnamed Occurrences (ARDF - MG084)
West Fork-Post River Occurrence

Latitude: 61°44'29"N
Longitude: 153°42'40"W
Decimal Degree (lat, lon): 61.741388888889,-153.71111111111

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 Co Cu F Fe H Hg K Mo Na O P Pb S Sb Si Sn W Y Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ArsenopyriteBaryteCalciteChalcopyriteClayClinozoisiteCopperEpidoteFeldsparFluorite
GeocroniteKaoliniteMalachiteMicaMolybdeniteNickelineNoneNot in a structural groupPyriteQuartz
RocksaltRutileScheeliteSphaleriteSpinelStibniteTetrahedriteZircon

29 IMA Minerals at location:
Albite  (*)Ankerite  (*)Arsenopyrite  (*)Azurite  (*)Baryte  (*)
Bornite  (*)Calcite  (*)Cassiterite  (*)Chalcopyrite  (*)Cinnabar  (*)
Epidote  (*)Fluorite  (*)Galena  (*)Glaucodot  (*)Gold  (*)
Jordanite  (*)Kaolinite  (*)Magnetite  (*)Malachite  (*)Molybdenite  (*)
Muscovite  (*)Pyrite  (*)Pyrrhotite  (*)Quartz  (*)Scheelite  (*)
Sphalerite  (*)Stibnite  (*)Tennantite-(Fe)  (*)Xenotime-(Y)  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)2129158,1291728803
Ankerite  (*)NoneCa(Fe2+,Mg)(CO3)211291913092
Arsenopyrite  (*)ArsenopyriteFeAsS15129153,129158,129159,129161,129165,129166,129167,129171,129174,129175,129183,129185,129187,129190,1291919052
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)211291725509
Baryte  (*)BaryteBa(SO4)2129156,12916711547
Bornite  (*)NoneCu5FeS42129172,1291805516
Calcite  (*)CalciteCa(CO3)4129153,129162,129170,12919127770
Cassiterite  (*)RutileSnO211291925171
Chalcopyrite  (*)ChalcopyriteCuFeS219129153,129158,129159,129161,129162,129165,129166,129167,129170,129172,129174,129175,129176,129177,129179,129180,129184,129191,12919327198
Cinnabar  (*)NoneHgS2129157,1291632600
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)2129153,1291598173
Fluorite  (*)FluoriteCaF211291589617
Galena  (*)RocksaltPbS12129153,129158,129159,129164,129166,129167,129171,129176,129178,129180,129187,12918824243
Glaucodot  (*)Arsenopyrite(Co0.5Fe0.5)AsS1129159131
Gold  (*)CopperAu7129152,129154,129155,129157,129160,129163,12916630554
Jordanite  (*)GeocronitePb14As6S231129166105
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)411291585591
Magnetite  (*)SpinelFe2+Fe3+2O4112915914899
Malachite  (*)MalachiteCu2(CO3)(OH)2112917212537
Molybdenite  (*)MolybdeniteMoS24129158,129166,129170,1291915800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)26129153,129158,129164,129166,129172,12917617380
Pyrite  (*)PyriteFeS223129153,129159,129162,129164,129165,129166,129167,129170,129175,129176,129177,129179,129180,129181,129182,129183,129184,129185,129186,129187,129188,129189,12919139462
Pyrrhotite  (*)NickelineFe7S89129153,129159,129161,129165,129166,129175,129176,129191,1291939056
Quartz  (*)QuartzSiO225129153,129158,129159,129161,129162,129164,129165,129166,129167,129170,129172,129174,129175,129176,129177,129179,129183,129184,129185,129186,129187,129188,129189,129190,12919161156
Scheelite  (*)ScheeliteCa(WO4)2129162,1291674894
Sphalerite  (*)SphaleriteZnS13129153,129158,129159,129164,129166,129167,129171,129175,129176,129178,129180,129191,12919321482
Stibnite  (*)StibniteSb2S33129165,129167,1291733418
Tennantite-(Fe)  (*)TetrahedriteCu6(Cu4Fe2)As4S1311291661803
Xenotime-(Y)  (*)ZirconY(PO4)2129168,129169939



No ages have been assigned to this locality yet.

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All locality data graciously provided by mindat.org

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