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:
Island Mountain Mine (Dahrman Group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USA

Oldest recorded age at locality: 108
Youngest recorded age at locality: 108

mindat Locality ID: 12058
mindat URL: http://www.mindat.org/loc-12058.html

Tectonic Settings: Backarc Environment

Total number of sublocalities beneath "Island Mountain Mine (Dahrman Group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 40°1'0"N
Longitude: 123°28'60"W
Decimal Degree (lat, lon): 40.016666666667,-123.48333333333

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 C Ca Co Cu Fe H Mg Ni O S Si Zn 

Elements from minerals reported directly at this locality: Al As C Ca Co Cu Fe H Mg Ni O S Si Zn 

Structural Groups for minerals in this locality: 
ArsenoliteArsenopyriteCalciteChalcanthiteChalcopyriteCopiapiteCopperCoquimbiteCubaniteEpsomite
GypsumHalotrichiteKieseriteMalachiteMelanteriteNickelineNoneNot in a structural groupOrpimentPyrite
QuartzRömeriteSphaleriteWurtzite

29 IMA Minerals at location:
Aluminocopiapite  (*)Arsenolite  (*)Arsenopyrite  (*)Azurite  (*)Bieberite  (*)
Bornite  (*)Calcite  (*)Chalcanthite  (*)Chalcocite  (*)Chalcopyrite  (*)
Copiapite  (*)Copper  (*)Coquimbite  (*)Cubanite  (*)Fibroferrite  (*)
Goslarite  (*)Gypsum  (*)Halotrichite  (*)Kornelite  (*)Malachite  (*)
Melanterite  (*)Morenosite  (*)Orpiment  (*)Pyrite  (*)Pyrrhotite  (*)
Quartz  (*)Römerite  (*)Sphalerite  (*)Szomolnokite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Aluminocopiapite  (*)Copiapite(Al,Mg)Fe3+4(SO4)6(OH,O)2·20H2O108108050
Arsenolite  (*)ArsenoliteAs2O31081080231
Arsenopyrite  (*)ArsenopyriteFeAsS10810809052
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)210810805509
Bieberite  (*)MelanteriteCo(SO4)·7H2O108108050
Bornite  (*)NoneCu5FeS410810805516
Calcite  (*)CalciteCa(CO3)108108027770
Chalcanthite  (*)ChalcanthiteCu(SO4)·5H2O1081080925
Chalcocite  (*)NoneCu2S10810805707
Chalcopyrite  (*)ChalcopyriteCuFeS2108108027198
Copiapite  (*)CopiapiteFe2+Fe3+4(SO4)6(OH)2·20H2O1081080382
Copper  (*)CopperCu10810803846
Coquimbite  (*)CoquimbiteAlFe3(SO4)6(H2O)12·6H2O1081080136
Cubanite  (*)Cubanite WurtziteCuFe2S31081080802
Fibroferrite  (*)Not in a structural groupFe3+(SO4)(OH)·5H2O1081080107
Goslarite  (*)EpsomiteZn(SO4)·7H2O1081080188
Gypsum  (*)GypsumCa(SO4)·2H2O10810806890
Halotrichite  (*)HalotrichiteFe2+Al2(SO4)4·22H2O1081080409
Kornelite  (*)Not in a structural groupFe3+2(SO4)3·7H2O (?)108108021
Malachite  (*)MalachiteCu2(CO3)(OH)2108108012537
Melanterite  (*)MelanteriteFe(SO4)·7H2O1081080915
Morenosite  (*)EpsomiteNi(SO4)·7H2O108108084
Orpiment  (*)OrpimentAs2S31081080511
Pyrite  (*)PyriteFeS2108108039462
Pyrrhotite  (*)NickelineFe7S810810809056
Quartz  (*)QuartzSiO2108108061156
Römerite  (*)RömeriteFe2+Fe3+2(SO4)4·14H2O1081080115
Sphalerite  (*)SphaleriteZnS108108021482
Szomolnokite  (*)KieseriteFe(SO4)·H2O1081080139



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
vms-01032108108Early to Middle Cretaceous       S12058Island Mountain Mine (Dahrman Group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USAIsland MountainMoiser et al. (2009) USGSOFR2009_1034 


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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