Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

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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:
Obuasi, Ashanti Gold Belt, Western Region, Ghana

Oldest recorded age at locality: 2157
Youngest recorded age at locality: 2091

mindat Locality ID: 284908
mindat URL: http://www.mindat.org/loc-284908.html

Tectonic Settings:

Total number of sublocalities beneath "Obuasi, Ashanti Gold Belt, Western Region, Ghana": 8
Total number of bottom-level sublocalities: 8

Number of Child Localities: 8
Child Localities:
Ashanti Mine
Ayeimn Mine
Blackie's Mine
Cote D'Or Mine
Justice Mine
Obussi South Mine
Old Chief Mine
Tom Collins Mine

Latitude: 6°14'0"N
Longitude: 1°38'59"W
Decimal Degree (lat, lon): 6.2333333333333,-1.6497222222222

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The 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.

Arsenolite	Arsenopyrite	Bournonite	Calcite	Chalcopyrite	Clay	Copper	Corundum	Diaspore	Kaňkite
Löllingite	Marcasite	Melonite	Mica	Nickeline	None	Not in a structural group	Pyrite	Quartz	Rocksalt
Rutile	Sphalerite	Stibnite	Tetrahedrite

Alabandite ()*	Altaite ()*	Ankerite ()*	Arsenolite ()*	Arsenopyrite ()*
Aurostibite ()*	Bornite ()*	Boulangerite ()*	Bournonite ()*	Bukovskýite ()*
Calaverite ()*	Calcite ()*	Chalcocite ()*	Chalcopyrite ()*	Coloradoite ()*
Cuprite ()*	Freibergite ()*	Galena ()*	Goethite ()*	Gold ()*
Graphite ()*	Hematite ()*	Henryite ()*	Hessite ()*	Kaňkite ()*
Kostovite ()*	Löllingite ()*	Marcasite ()*	Muscovite ()*	Gersdorffite-Pa3 ()*
Petzite ()*	Pitticite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*
Rickardite ()*	Rutile ()*	Scorodite ()*	Sphalerite ()*	Stibnite ()*
Stützite ()*	Sylvanite ()*	Tetrahedrite-(Zn) ()*	Weissite ()*

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 As Au C Ca Cu Fe H Hg K Mn Ni O Pb S Sb Si Te Ti Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Arsenolite Arsenopyrite Bournonite Calcite Chalcopyrite Clay Copper Corundum Diaspore Kaňkite
Löllingite Marcasite Melonite Mica Nickeline None Not in a structural group Pyrite Quartz Rocksalt
Rutile Sphalerite Stibnite Tetrahedrite

44 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Alabandite ()*	Rocksalt	MnS	2157	2091	1	63876	312
Altaite ()*	Rocksalt	PbTe	2157	2091	1	63876	489
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	2157	2091	1	63876	3092
Arsenolite ()*	Arsenolite	As₂O₃	2157	2091	2	63876,63880	231
Arsenopyrite ()*	Arsenopyrite	FeAsS	2157	2091	2	63876,63880	9052
Aurostibite ()*	Pyrite	AuSb₂	2157	2153	1	63876	73
Bornite ()*	None	Cu₅FeS₄	2157	2091	2	63876,63880	5516
Boulangerite ()*	None	Pb₅Sb₄S₁₁	2157	2091	1	63876	843
Bournonite ()*	Bournonite	CuPbSbS₃	2157	2091	1	63876	1089
Bukovskýite ()*	None	Fe³⁺₂(AsO₄)(SO₄)(OH)·7H₂O	2157	2091	1	63876	13
Calaverite ()*	Melonite	AuTe₂	2157	2153	1	63876	361
Calcite ()*	Calcite	Ca(CO₃)	2157	2091	1	63876	27770
Chalcocite ()*	None	Cu₂S	2157	2091	1	63876	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	2157	2091	2	63876,63880	27198
Coloradoite ()*	Sphalerite	HgTe	2157	2091	1	63876	169
Cuprite ()*	Not in a structural group	Cu₂O	2157	2091	1	63880	2970
Freibergite ()*	Tetrahedrite	Ag₆[Cu₄Fe₂]Sb₄S₁₂	2157	2091	1	63876	663
Galena ()*	Rocksalt	PbS	2157	2091	1	63876	24243
Goethite ()*	Diaspore	FeO(OH)	2157	2091	2	63876,63880	7437
Gold ()*	Copper	Au	2157	2153	2	63876,63880	30554
Graphite ()*	None	C	2157	2091	1	63876	2812
Hematite ()*	Corundum	Fe₂O₃	2157	2091	2	63876,63880	14640
Henryite ()*	None	(Cu,Ag)_3+xTe₂ (x~0.4)	2157	2091	1	63876	4
Hessite ()*	None	Ag₂Te	2157	2091	1	63876	804
Kaňkite ()*	Kaňkite	Fe³⁺(AsO₄)·3.5H₂O	2157	2091	1	63876	38
Kostovite ()*	None	AuCuTe₄	2157	2153	1	63876	21
Löllingite ()*	Löllingite	FeAs₂	2157	2091	1	63876	762
Marcasite ()*	Marcasite	FeS₂	2157	2091	1	63876	5674
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	2157	2091	1	63876	17380
Gersdorffite-Pa3 ()*	Pyrite	NiAsS	2157	2091	1	63876	767
Petzite ()*	None	Ag₃AuTe₂	2157	2153	1	63876	409
Pitticite ()*	None	[Fe,AsO₄,SO₄,H₂O] (?)	2157	2091	1	63876	140
Pyrite ()*	Pyrite	FeS₂	2157	2091	2	63876,63880	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	2157	2091	2	63876,63880	9056
Quartz ()*	Quartz	SiO₂	2157	2091	2	63876,63880	61156
Rickardite ()*	None	Cu_3-xTe₂	2157	2091	1	63876	52
Rutile ()*	Rutile	TiO₂	2105	2091	1	63876	5614
Scorodite ()*	None	Fe³⁺(AsO₄)·2H₂O	2157	2091	2	63876,63880	1153
Sphalerite ()*	Sphalerite	ZnS	2157	2091	2	63876,63880	21482
Stibnite ()*	Stibnite	Sb₂S₃	2157	2091	1	63876	3418
Stützite ()*	None	Ag_5-xTe₃ (x = 0.24-0.36)	2157	2091	1	63876	92
Sylvanite ()*	Melonite	AgAuTe₄	2157	2153	1	63876	337
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	2157	2091	1	63876	5317
Weissite ()*	None	Cu_2-xTe	2157	2091	1	63876	31

2 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	PR89_129-1	2157	2153	2155±2	207Pb/206Pb		high	zircon	20		Yes	Zircon	Gold	Au	192427	Ashanti Gold Belt, Western Region, Ghana	Ashanti belt, Ghana	Oberthür et al. (1998)	10.1016/S0301-9268(97)00075-2	PR89_129	Fig. 4
	PR89_129-2	2105	2091	2098±7	Pb/Pb			rutile	GH789		Yes	Rutile	Gold	Au	192427	Ashanti Gold Belt, Western Region, Ghana	Ashanti belt, Ghana	Oberthür et al. (1998)	10.1016/S0301-9268(97)00075-3	PR89_130	Fig. 8

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...