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Omai gold mine, Omai, Cuyuni-Mazaruni Region, Guyanai
Regional Level Types
Omai gold mineMine
Omai- not defined -
Cuyuni-Mazaruni RegionRegion
GuyanaCountry

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07820590017272032184849.jpg
View of the Omai gold mining area, ca. 1900.

Omai gold mine, Omai, Cuyuni-Mazaruni Region, Guyana
07820590017272032184849.jpg
View of the Omai gold mining area, ca. 1900.

Omai gold mine, Omai, Cuyuni-Mazaruni Region, Guyana
07820590017272032184849.jpg
View of the Omai gold mining area, ca. 1900.

Omai gold mine, Omai, Cuyuni-Mazaruni Region, Guyana
Latitude & Longitude (WGS84):
5° 25' 42'' North , 58° 45' 40'' West
Latitude & Longitude (decimal):
5.42846,-58.76115
GRN:
N04W41
Type:
Mine
Köppen climate type:
Af : Tropical rainforest climate
Nearest Settlements:
PlacePopulationDistance
Mahdia4,200 (2013)46.6km
Owned/operated by:
Mahdia Gold Corporation
Mindat Locality ID:
16661
Long-form identifier:
mindat:1:2:16661:9
GUID (UUID V4):
0


Located on the west bank of the Essequibo River.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

38 valid minerals.

Detailed Mineral List:

ⓘ Aikinite ?
Formula: CuPbBiS3
ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Altaite
Formula: PbTe
ⓘ Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
ⓘ 'Apatite'
Formula: Ca5(PO4)3A
ⓘ Calaverite
Formula: AuTe2
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Coloradoite
Formula: HgTe
ⓘ Corrensite
Formula: (Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
ⓘ Dravite
Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ Ephesite
Formula: NaLiAl2(Al2Si2O10)(OH)2
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ 'Feldspar Group'
ⓘ Galena
Formula: PbS
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Guyanaite
Formula: CrO(OH)
ⓘ Hematite
Formula: Fe2O3
ⓘ Hessite
Formula: Ag2Te
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Melonite
Formula: NiTe2
ⓘ 'Mica Group'
ⓘ Molybdenite
Formula: MoS2
ⓘ 'Monazite Group'
Formula: REE(PO4)
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Nacrite
Formula: Al2(Si2O5)(OH)4
ⓘ Nagyágite ?
Formula: [Pb3(Pb,Sb)3S6](Au,Te)3
ⓘ Native Bismuth
Formula: Bi
ⓘ Native Copper
Formula: Cu
ⓘ Native Gold
Formula: Au
ⓘ Petzite
Formula: Ag3AuTe2
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Milky Quartz
Formula: SiO2
ⓘ Quartz var. Smoky Quartz
Formula: SiO2
ⓘ Rutile
Formula: TiO2
ⓘ Scheelite
Formula: Ca(WO4)
ⓘ 'Smectite Group'
Formula: A0.3D2-3[T4O10]Z2 · nH2O
ⓘ Sphalerite
Formula: ZnS
ⓘ Tellurobismuthite
Formula: Bi2Te3
ⓘ Tetradymite
Formula: Bi2Te2S
ⓘ Titanite
Formula: CaTiO(SiO4)
ⓘ 'Tourmaline'
Formula: AD3G6(T6O18)(BO3)3X3Z
ⓘ Volynskite
Formula: AgBiTe2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
ⓘNative Gold1.AA.05Au
ⓘNative Bismuth1.CA.05Bi
Group 2 - Sulphides and Sulfosalts
ⓘHessite2.BA.60Ag2Te
ⓘPetzite2.BA.75Ag3AuTe2
ⓘColoradoite2.CB.05aHgTe
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘAltaite2.CD.10PbTe
ⓘGalena2.CD.10PbS
ⓘTellurobismuthite2.DC.05Bi2Te3
ⓘTetradymite2.DC.05Bi2Te2S
ⓘCalaverite2.EA.10AuTe2
ⓘMelonite2.EA.20NiTe2
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
ⓘAikinite ?2.HB.05aCuPbBiS3
ⓘNagyágite ?2.HB.20a[Pb3(Pb,Sb)3S6](Au,Te)3
ⓘVolynskite2.JA.20AgBiTe2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘvar. Smoky Quartz4.DA.05SiO2
ⓘvar. Milky Quartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
ⓘGuyanaite4.FD.10CrO(OH)
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘAnkerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘScheelite7.GA.05Ca(WO4)
Group 9 - Silicates
ⓘTitanite9.AG.15CaTiO(SiO4)
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘDravite9.CK.05NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘEphesite9.EC.20NaLiAl2(Al2Si2O10)(OH)2
ⓘCorrensite9.EC.60(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
ⓘNacrite9.ED.05Al2(Si2O5)(OH)4
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Feldspar Group'-
ⓘ'Monazite Group'-REE(PO4)
ⓘ'Tourmaline'-AD3G6(T6O18)(BO3)3X3Z
ⓘ'Mica Group'-
ⓘ'Smectite Group'-A0.3D2-3[T4O10]Z2 · nH2O
ⓘ'Apatite'-Ca5(PO4)3A

List of minerals for each chemical element

HHydrogen
Hⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Hⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ EphesiteNaLiAl2(Al2Si2O10)(OH)2
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ GoethiteFe3+O(OH)
Hⓘ GuyanaiteCrO(OH)
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ NacriteAl2(Si2O5)(OH)4
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Hⓘ Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
LiLithium
Liⓘ EphesiteNaLiAl2(Al2Si2O10)(OH)2
BBoron
Bⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Bⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
CCarbon
Cⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Oⓘ CalciteCaCO3
Oⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Oⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ EphesiteNaLiAl2(Al2Si2O10)(OH)2
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ GoethiteFe3+O(OH)
Oⓘ GuyanaiteCrO(OH)
Oⓘ HematiteFe2O3
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ Monazite GroupREE(PO4)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ NacriteAl2(Si2O5)(OH)4
Oⓘ QuartzSiO2
Oⓘ RutileTiO2
Oⓘ ScheeliteCa(WO4)
Oⓘ Quartz var. Smoky QuartzSiO2
Oⓘ TitaniteCaTiO(SiO4)
Oⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
Oⓘ Quartz var. Milky QuartzSiO2
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
Oⓘ ApatiteCa5(PO4)3A
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Naⓘ EphesiteNaLiAl2(Al2Si2O10)(OH)2
MgMagnesium
Mgⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Mgⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Mgⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Alⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ EphesiteNaLiAl2(Al2Si2O10)(OH)2
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ NacriteAl2(Si2O5)(OH)4
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Siⓘ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ EphesiteNaLiAl2(Al2Si2O10)(OH)2
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ NacriteAl2(Si2O5)(OH)4
Siⓘ QuartzSiO2
Siⓘ Quartz var. Smoky QuartzSiO2
Siⓘ TitaniteCaTiO(SiO4)
Siⓘ Quartz var. Milky QuartzSiO2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
PPhosphorus
Pⓘ Monazite GroupREE(PO4)
Pⓘ ApatiteCa5(PO4)3A
SSulfur
Sⓘ AikiniteCuPbBiS3
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ MolybdeniteMoS2
Sⓘ Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ TetradymiteBi2Te2S
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Caⓘ CalciteCaCO3
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ ScheeliteCa(WO4)
Caⓘ TitaniteCaTiO(SiO4)
Caⓘ ApatiteCa5(PO4)3A
TiTitanium
Tiⓘ RutileTiO2
Tiⓘ TitaniteCaTiO(SiO4)
CrChromium
Crⓘ GuyanaiteCrO(OH)
FeIron
Feⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Feⓘ ChalcopyriteCuFeS2
Feⓘ Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ GoethiteFe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
NiNickel
Niⓘ MeloniteNiTe2
CuCopper
Cuⓘ AikiniteCuPbBiS3
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ Native CopperCu
ZnZinc
Znⓘ SphaleriteZnS
MoMolybdenum
Moⓘ MolybdeniteMoS2
AgSilver
Agⓘ HessiteAg2Te
Agⓘ PetziteAg3AuTe2
Agⓘ VolynskiteAgBiTe2
SbAntimony
Sbⓘ Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
TeTellurium
Teⓘ AltaitePbTe
Teⓘ CalaveriteAuTe2
Teⓘ ColoradoiteHgTe
Teⓘ HessiteAg2Te
Teⓘ MeloniteNiTe2
Teⓘ Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
Teⓘ PetziteAg3AuTe2
Teⓘ TellurobismuthiteBi2Te3
Teⓘ TetradymiteBi2Te2S
Teⓘ VolynskiteAgBiTe2
WTungsten
Wⓘ ScheeliteCa(WO4)
AuGold
Auⓘ CalaveriteAuTe2
Auⓘ Native GoldAu
Auⓘ Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
Auⓘ PetziteAg3AuTe2
HgMercury
Hgⓘ ColoradoiteHgTe
PbLead
Pbⓘ AikiniteCuPbBiS3
Pbⓘ AltaitePbTe
Pbⓘ GalenaPbS
Pbⓘ Nagyágite[Pb3(Pb,Sb)3S6](Au,Te)3
BiBismuth
Biⓘ AikiniteCuPbBiS3
Biⓘ Native BismuthBi
Biⓘ TellurobismuthiteBi2Te3
Biⓘ TetradymiteBi2Te2S
Biⓘ VolynskiteAgBiTe2

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Omai_Mine
Wikidata ID:Q17072538

Localities in this Region

Guyana

Other Regions, Features and Areas containing this locality

South AmericaContinent
South America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Elliott, Roy Graham (1992) The geology and geochemistry of the Omai goldfield, Guyana. Ph.D. Thesis, Oxford Brookes University.
Gabriel, V. (1999) Geology, Geochemistry and Metallogeny of the Omai Gold Deposit, Guiana Shield, South America. PhD Thesis, University of Quebec Chicoutimi. ( https://www.collectionscanada.gc.ca/obj/s4/f2/dsk1/tape8/PQDD_0016/NQ43281.pdf )
Voicu, G., Bardoux, M., Stevenson, R., Jébrak, M. (2000) Nd and Sr isotope study of hydrothermal scheelite and host rocks at Omai, Guiana Shield: implications for ore fluid source and flow path during the formation of orogenic gold deposits. Mineralium Deposita, 35 (4) 302-314 doi:10.1007/s001260050243
Voicu, G., & Bardoux, M. (2002). Geochemical behavior under tropical weathering of the Barama–Mazaruni greenstone belt at Omai gold mine, Guiana Shield. Applied geochemistry, 17(3), 321-336.
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