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Ashanti Mine, Obuasi Gold Project, Obuasi Municipal District, Ashanti Region, Ghanai
Regional Level Types
Ashanti MineMine
Obuasi Gold ProjectProject
Obuasi Municipal DistrictDistrict
Ashanti RegionRegion
GhanaCountry

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03324840017272028796280.jpg
View of the Obuasi gold mining area, ca. 1910.

Ashanti Mine, Obuasi Gold Project, Obuasi Municipal District, Ashanti Region, Ghana
02333810017272028807311.jpg
View of the Obuasi gold mining area, ca. 1910.

Ashanti Mine, Obuasi Gold Project, Obuasi Municipal District, Ashanti Region, Ghana
00063120017272028813691.jpg
View of the Obuasi gold mining area, ca. 1910.

Ashanti Mine, Obuasi Gold Project, Obuasi Municipal District, Ashanti Region, Ghana
03324840017272028796280.jpg
View of the Obuasi gold mining area, ca. 1910.

Ashanti Mine, Obuasi Gold Project, Obuasi Municipal District, Ashanti Region, Ghana
02333810017272028807311.jpg
View of the Obuasi gold mining area, ca. 1910.

Ashanti Mine, Obuasi Gold Project, Obuasi Municipal District, Ashanti Region, Ghana
00063120017272028813691.jpg
View of the Obuasi gold mining area, ca. 1910.

Ashanti Mine, Obuasi Gold Project, Obuasi Municipal District, Ashanti Region, Ghana
03324840017272028796280.jpg
View of the Obuasi gold mining area, ca. 1910.

Ashanti Mine, Obuasi Gold Project, Obuasi Municipal District, Ashanti Region, Ghana
02333810017272028807311.jpg
View of the Obuasi gold mining area, ca. 1910.

Ashanti Mine, Obuasi Gold Project, Obuasi Municipal District, Ashanti Region, Ghana
Latitude & Longitude (WGS84):
6° 14' North , 1° 39' West
Latitude & Longitude (decimal):
6.23333,-1.65000
GRN:
N05W02
Type:
Mine
Köppen climate type:
Aw : Tropical savanna, wet
Nearest Settlements:
PlacePopulationDistance
Obuase137,856 (2017)4.0km
Bekwai4,260 (2017)25.5km
Dunkwa33,379 (2018)33.5km
Kumasi1,468,609 (2011)50.7km
Tafo50,457 (2017)55.5km
Mindat Locality ID:
9929
Long-form identifier:
mindat:1:2:9929:8
GUID (UUID V4):
0


A gold property producing an average of 7,500 kg Au (1983-1984).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


41 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Alabandite
Formula: MnS
ⓘ Altaite
Formula: PbTe
ⓘ Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
ⓘ Arsenolite
Formula: As2O3
ⓘ Arsenopyrite
Formula: FeAsS
References:
Bowell, R. J., Foster, R. P., Stanley, C. J. (1990) Telluride mineralization at Ashanti gold mine, Ghana. Mineralogical Magazine, 54 (377) 617-627 doi:10.1180/minmag.1990.054.377.15
Econ Geol (1996) 91:289-301
Oberthür, T., Weiser, T., Amanor, J. A., Chryssoulis, S. L. (1997) Mineralogical siting and distribution of gold in quartz veins and sulfide ores of the Ashanti mine and other deposits in the Ashanti belt of Ghana: genetic implications. Mineralium Deposita, 32 (1) 2-15 doi:10.1007/s001260050068
Bonev, I.K., Petrunov, R., Cook, N.J., Ciobanu, C.L. (2005) Kostovite and its argentian varieties: Deposits and mineral associations. Geochemistry, Mineralogy and Petrology (Bulgarian Academy of Sciences): 42: 1-22.
Craw, D., & Bowell, R. J. (2014). The characterization of arsenic in mine waste. Reviews in Mineralogy and Geochemistry, 79(1), 473-505.
ⓘ Aurostibite
Formula: AuSb2
ⓘ Bornite
Formula: Cu5FeS4
ⓘ Boulangerite
Formula: Pb5Sb4S11
ⓘ Bournonite
Formula: PbCuSbS3
ⓘ Bukovskýite
Formula: Fe3+2(AsO4)(SO4)(OH) · 9H2O
ⓘ Calaverite
Formula: AuTe2
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcocite
Formula: Cu2S
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Coloradoite
Formula: HgTe
ⓘ 'Freibergite Subgroup'
Formula: (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1
ⓘ Galena
Formula: PbS
ⓘ Gersdorffite
Formula: NiAsS
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Graphite
Formula: C
ⓘ Hematite
Formula: Fe2O3
ⓘ Henryite
Formula: (Cu,Ag)3+xTe2 , with x ~ 0.40
ⓘ Hessite
Formula: Ag2Te
ⓘ Kaňkite
Formula: FeAsO4 · 3.5H2O
ⓘ Kostovite
Formula: CuAuTe4
ⓘ Löllingite
Formula: FeAs2
ⓘ Marcasite
Formula: FeS2
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Native Gold
Formula: Au
References:
Bowell, R. J., Foster, R. P., Stanley, C. J. (1990) Telluride mineralization at Ashanti gold mine, Ghana. Mineralogical Magazine, 54 (377) 617-627 doi:10.1180/minmag.1990.054.377.15
Econ Geol (1996) 91:289-301
Oberthür, T., Weiser, T., Amanor, J. A., Chryssoulis, S. L. (1997) Mineralogical siting and distribution of gold in quartz veins and sulfide ores of the Ashanti mine and other deposits in the Ashanti belt of Ghana: genetic implications. Mineralium Deposita, 32 (1) 2-15 doi:10.1007/s001260050068
Bonev, I.K., Petrunov, R., Cook, N.J., Ciobanu, C.L. (2005) Kostovite and its argentian varieties: Deposits and mineral associations. Geochemistry, Mineralogy and Petrology (Bulgarian Academy of Sciences): 42: 1-22.
Craw, D., & Bowell, R. J. (2014). The characterization of arsenic in mine waste. Reviews in Mineralogy and Geochemistry, 79(1), 473-505.
ⓘ Native Gold var. Electrum
Formula: (Au,Ag)
ⓘ Petzite
Formula: Ag3AuTe2
ⓘ Pitticite
Formula: (Fe, AsO4, H2O) (?)
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Smoky Quartz
Formula: SiO2
ⓘ Rickardite
Formula: Cu7Te5
ⓘ Rutile
Formula: TiO2
ⓘ Scorodite
Formula: Fe3+AsO4 · 2H2O
ⓘ Sphalerite
Formula: ZnS
ⓘ Stibnite
Formula: Sb2S3
ⓘ Stützite
Formula: Ag5-xTe3, x = 0.24-0.36
ⓘ Sylvanite
Formula: AgAuTe4
ⓘ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
ⓘ Weissite
Formula: Cu2-xTe

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold
var. Electrum		1.AA.05(Au,Ag)
ⓘ1.AA.05Au
ⓘGraphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘBornite2.BA.15Cu5FeS4
ⓘRickardite2.BA.30Cu7Te5
ⓘWeissite2.BA.30Cu2-xTe
ⓘHessite2.BA.60Ag2Te
ⓘHenryite2.BA.65(Cu,Ag)3+xTe2 , with x ~ 0.40
ⓘStützite2.BA.65Ag5-xTe3, x = 0.24-0.36
ⓘPetzite2.BA.75Ag3AuTe2
ⓘColoradoite2.CB.05aHgTe
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘAlabandite2.CD.10MnS
ⓘAltaite2.CD.10PbTe
ⓘGalena2.CD.10PbS
ⓘStibnite2.DB.05Sb2S3
ⓘSylvanite2.EA.05AgAuTe4
ⓘCalaverite2.EA.10AuTe2
ⓘKostovite2.EA.15CuAuTe4
ⓘAurostibite2.EB.05aAuSb2
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
ⓘLöllingite2.EB.15aFeAs2
ⓘArsenopyrite2.EB.20FeAsS
ⓘGersdorffite2.EB.25NiAsS
ⓘBournonite2.GA.50PbCuSbS3
ⓘ'Freibergite Subgroup'2.GB.05(Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
ⓘBoulangerite2.HC.15Pb5Sb4S11
Group 4 - Oxides and Hydroxides
ⓘHematite4.CB.05Fe2O3
ⓘArsenolite4.CB.50As2O3
ⓘQuartz4.DA.05SiO2
ⓘvar. Smoky Quartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
ⓘGoethite4.FD.10Fe3+O(OH)
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘAnkerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Group 8 - Phosphates, Arsenates and Vanadates
ⓘScorodite8.CD.10Fe3+AsO4 · 2H2O
ⓘKaňkite8.CE.60FeAsO4 · 3.5H2O
ⓘPitticite8.DB.05(Fe, AsO4, H2O) (?)
ⓘBukovskýite8.DB.40Fe3+2(AsO4)(SO4)(OH) · 9H2O
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ BukovskýiteFe23+(AsO4)(SO4)(OH) · 9H2O
Hⓘ GoethiteFe3+O(OH)
Hⓘ KaňkiteFeAsO4 · 3.5H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Pitticite(Fe, AsO4, H2O) (?)
Hⓘ ScoroditeFe3+AsO4 · 2H2O
CCarbon
Cⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Cⓘ CalciteCaCO3
Cⓘ GraphiteC
OOxygen
Oⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Oⓘ ArsenoliteAs2O3
Oⓘ BukovskýiteFe23+(AsO4)(SO4)(OH) · 9H2O
Oⓘ CalciteCaCO3
Oⓘ GoethiteFe3+O(OH)
Oⓘ HematiteFe2O3
Oⓘ KaňkiteFeAsO4 · 3.5H2O
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Pitticite(Fe, AsO4, H2O) (?)
Oⓘ QuartzSiO2
Oⓘ RutileTiO2
Oⓘ ScoroditeFe3+AsO4 · 2H2O
Oⓘ Quartz var. Smoky QuartzSiO2
MgMagnesium
Mgⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
AlAluminium
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ Quartz var. Smoky QuartzSiO2
SSulfur
Sⓘ AlabanditeMnS
Sⓘ ArsenopyriteFeAsS
Sⓘ BorniteCu5FeS4
Sⓘ BoulangeritePb5Sb4S11
Sⓘ BournonitePbCuSbS3
Sⓘ BukovskýiteFe23+(AsO4)(SO4)(OH) · 9H2O
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcociteCu2S
Sⓘ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Sⓘ GalenaPbS
Sⓘ GersdorffiteNiAsS
Sⓘ MarcasiteFeS2
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ StibniteSb2S3
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Caⓘ CalciteCaCO3
TiTitanium
Tiⓘ RutileTiO2
MnManganese
Mnⓘ AlabanditeMnS
FeIron
Feⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Feⓘ ArsenopyriteFeAsS
Feⓘ BorniteCu5FeS4
Feⓘ BukovskýiteFe23+(AsO4)(SO4)(OH) · 9H2O
Feⓘ ChalcopyriteCuFeS2
Feⓘ GoethiteFe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ KaňkiteFeAsO4 · 3.5H2O
Feⓘ LöllingiteFeAs2
Feⓘ MarcasiteFeS2
Feⓘ Pitticite(Fe, AsO4, H2O) (?)
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ ScoroditeFe3+AsO4 · 2H2O
NiNickel
Niⓘ GersdorffiteNiAsS
CuCopper
Cuⓘ BorniteCu5FeS4
Cuⓘ BournonitePbCuSbS3
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcociteCu2S
Cuⓘ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Cuⓘ Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40
Cuⓘ KostoviteCuAuTe4
Cuⓘ RickarditeCu7Te5
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
Cuⓘ WeissiteCu2-xTe
ZnZinc
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ ArsenoliteAs2O3
Asⓘ ArsenopyriteFeAsS
Asⓘ BukovskýiteFe23+(AsO4)(SO4)(OH) · 9H2O
Asⓘ GersdorffiteNiAsS
Asⓘ KaňkiteFeAsO4 · 3.5H2O
Asⓘ LöllingiteFeAs2
Asⓘ Pitticite(Fe, AsO4, H2O) (?)
Asⓘ ScoroditeFe3+AsO4 · 2H2O
AgSilver
Agⓘ Native Gold var. Electrum(Au,Ag)
Agⓘ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Agⓘ HessiteAg2Te
Agⓘ Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40
Agⓘ PetziteAg3AuTe2
Agⓘ StütziteAg5-xTe3, x = 0.24-0.36
Agⓘ SylvaniteAgAuTe4
SbAntimony
Sbⓘ AurostibiteAuSb2
Sbⓘ BoulangeritePb5Sb4S11
Sbⓘ BournonitePbCuSbS3
Sbⓘ Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1
Sbⓘ StibniteSb2S3
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
TeTellurium
Teⓘ AltaitePbTe
Teⓘ CalaveriteAuTe2
Teⓘ ColoradoiteHgTe
Teⓘ HessiteAg2Te
Teⓘ Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40
Teⓘ KostoviteCuAuTe4
Teⓘ PetziteAg3AuTe2
Teⓘ RickarditeCu7Te5
Teⓘ StütziteAg5-xTe3, x = 0.24-0.36
Teⓘ SylvaniteAgAuTe4
Teⓘ WeissiteCu2-xTe
AuGold
Auⓘ AurostibiteAuSb2
Auⓘ CalaveriteAuTe2
Auⓘ Native Gold var. Electrum(Au,Ag)
Auⓘ Native GoldAu
Auⓘ KostoviteCuAuTe4
Auⓘ PetziteAg3AuTe2
Auⓘ SylvaniteAgAuTe4
HgMercury
Hgⓘ ColoradoiteHgTe
PbLead
Pbⓘ AltaitePbTe
Pbⓘ BoulangeritePb5Sb4S11
Pbⓘ BournonitePbCuSbS3
Pbⓘ GalenaPbS

Other Regions, Features and Areas containing this locality

AfricaContinent
African PlateTectonic Plate
Ghana
West AfricaUN Subregion

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

Mining Annual Review(1985):448.
Bowell, R. J. (1994) Sulfide Oxidation and Production of Gossans, Ashanti Mine, Ghana. International Geology Review, 36 (8) 732-752 doi:10.1080/00206819409465485
Mumin, A. Hamid, Fleet, M. E. (1995) Evolution of gold mineralization in the Ashanti Gold Belt, Ghana: Evidence from carbonate compositions and parageneses. Mineralogy and Petrology, 55 (4) 265-280 doi:10.1007/bf01165121
Mumin, A. H., Fleet, M. E., Longstaffe, F. J. (1996) Evolution of hydrothermal fluids in the Ashanti gold belt, Ghana; stable isotope geochemistry of carbonates, graphite, and quartz. Economic Geology, 91 (1) 135-148 doi:10.2113/gsecongeo.91.1.135
Oberthür, T., Weiser, T., Amanor, J. A., Chryssoulis, S. L. (1997) Mineralogical siting and distribution of gold in quartz veins and sulfide ores of the Ashanti mine and other deposits in the Ashanti belt of Ghana: genetic implications. Mineralium Deposita, 32 (1) 2-15 doi:10.1007/s001260050068
Mumm, A. Schmidt, Oberthür, T., Vetter, U., Blenkinsop, T. G. (1997) High CO 2 content of fluid inclusions in gold mineralisations in the Ashanti Belt, Ghana: a new category of ore forming fluids? Mineralium Deposita, 32 (2). 107-118 doi:10.1007/s001260050078
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