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:
Omai Gold Mine, Omai, Upper Takutu-Upper Essequibo Region, Guyana

Oldest recorded age at locality: 2095
Youngest recorded age at locality: 1997

mindat Locality ID: 16661
mindat URL: http://www.mindat.org/loc-16661.html

Tectonic Settings:

Total number of sublocalities beneath "Omai Gold Mine, Omai, Upper Takutu-Upper Essequibo Region, Guyana": 6
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Broccoli Hill
Fennell Pit
Fennell West
Wenot East Extension
Wenot Pit
Wenot West Extension

Latitude: 5°26'26"N
Longitude: 58°45'37"W
Decimal Degree (lat, lon): 5.4405555555556,-58.760277777778
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 Au B Bi C Ca Cr Cu Fe H Hg K Li Mg Mo Na Ni O Pb S Si Te Ti W Zn 

Elements from minerals reported directly at this locality: Al B Bi Ca Cr Fe H K Li Mg Na O S Si Te Ti 

Structural Groups for minerals in this locality: 
ArsenicCalciteChalcopyriteClayClinozoisiteCopperCorrensiteCorundumDiasporeEpidote
FeldsparKaoliniteMeloniteMicaMolybdeniteNickelineNonePyriteQuartzRocksalt
RutileScheeliteSphaleriteSpinelTetradymiteTitaniteTourmaline

36 IMA Minerals at location:
Albite  (*)Altaite  (*)Ankerite  (*)Bismuth  (*)Calaverite  (*)
Calcite  (*)Chalcopyrite  (*)Coloradoite  (*)Copper  (*)Corrensite  (*)
Dravite  (*)Ephesite  (*)Epidote  (*)Galena  (*)Goethite  (*)
Gold  (*)Guyanaite  (*)Hematite  (*)Hessite  (*)Kaolinite  (*)
Magnetite  (*)Melonite  (*)Molybdenite  (*)Muscovite  (*)Nacrite  (*)
Petzite  (*)Pyrite  (*)Pyrrhotite  (*)Quartz  (*)Rutile  (*)
Scheelite  (*)Sphalerite  (*)Tellurobismuthite  (*)Tetradymite  (*)Titanite  (*)
Volynskite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)209519971647608803
Altaite  (*)RocksaltPbTe20951997164760489
Ankerite  (*)NoneCa(Fe2+,Mg)(CO3)2209519971647603092
Bismuth  (*)ArsenicBi2095199701966
Calaverite  (*)MeloniteAuTe220951997164760361
Calcite  (*)CalciteCa(CO3)2095199716476027770
Chalcopyrite  (*)ChalcopyriteCuFeS22095199716476027198
Coloradoite  (*)SphaleriteHgTe20951997164760169
Copper  (*)CopperCu209519971647603846
Corrensite  (*)Corrensite Clay(Ca,Na,K)1-x(Mg,Fe,Al)9(Si,Al)8O20(OH)10·nH2O20951997049
Dravite  (*)TourmalineNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)209519970648
Ephesite  (*)MicaNaLiAl2(Si2Al2)O10(OH)220951997021
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)209519971647608173
Galena  (*)RocksaltPbS2095199716476024243
Goethite  (*)DiasporeFeO(OH)2095199707437
Gold  (*)CopperAu20951997264760,6476330554
Guyanaite  (*)NoneCrO(OH)2095199706
Hematite  (*)CorundumFe2O32095199716476014640
Hessite  (*)NoneAg2Te20951997164760804
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)42095199705591
Magnetite  (*)SpinelFe2+Fe3+2O42095199716476014899
Melonite  (*)MeloniteNiTe220951997164760207
Molybdenite  (*)MolybdeniteMoS2209519971647605800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22095199716476017380
Nacrite  (*)Clay KaoliniteAl2Si2O5(OH)4209519970112
Petzite  (*)NoneAg3AuTe220951997164760409
Pyrite  (*)PyriteFeS22095199716476039462
Pyrrhotite  (*)NickelineFe7S8209519971647609056
Quartz  (*)QuartzSiO220951997264760,6476361156
Rutile  (*)RutileTiO2209519971647605614
Scheelite  (*)ScheeliteCa(WO4)209519971647604894
Sphalerite  (*)SphaleriteZnS2095199716476021482
Tellurobismuthite  (*)TetradymiteBi2Te320951997164760276
Tetradymite  (*)TetradymiteBi2Te2S209519970510
Titanite  (*)TitaniteCaTi(SiO4)O2095199704899
Volynskite  (*)NoneAgBiTe22095199716476064


2 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
Alexandra-0302200719972002±5U-PbAge og hydrothermal mineralizationfeldspar, titanite, apatite, rutileOM95-2, OM95-26, OM95-28   Au16661Omai Gold Mine, Omai, Upper Takutu-Upper Essequibo Region, GuyanaOmaiNorcross et al. (2000)10.1016/S0301-9268(99)00102-3PR102_69 
Alexandra-0303209520932094±1U-PbAge og hydrothermal mineralizationtitanite, apatiteOM95-2, OM95-4   Au16661Omai Gold Mine, Omai, Upper Takutu-Upper Essequibo Region, GuyanaOmaiNorcross et al. (2000)10.1016/S0301-9268(99)00102-3PR102_69 

SampleSource LocalityReference URL

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