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:
Mbale District, Eastern Region, Uganda

Oldest recorded age at locality: 66
Youngest recorded age at locality: 2.6

mindat Locality ID: 31314
mindat URL: http://www.mindat.org/loc-31314.html

Tectonic Settings:

Total number of sublocalities beneath "Mbale District, Eastern Region, Uganda": 9
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Budeda Complex
Bukusu Complex
Kapchorwa
Mbale Meteorite
Mbale Pegmatite
Namekara Mine

Latitude: 1°0'1"N
Longitude: 34°18'21"E
Decimal Degree (lat, lon): 1.0002777777778,34.305833333333

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.

Alunite	Analcime	Apatite	Baddeleyite	Baryte	Calcite	Calzirtite	Cancrinite	Clay	Corundum
Diaspore	Feldspar	Iron	None	Pyroxene	Quartz	Smectite-vermiculite	Spinel	Titanite	Zircon

Aegirine ()*	Aegirine-augite ()*	Analcime ()*	Augelite ()*	Baddeleyite ()*
Baryte ()*	Bismite ()*	Calcite ()*	Calzirtite ()*	Cancrinite ()*
Crandallite ()*	Fluorapatite ()*	Goethite ()*	Hematite ()*	Iron ()*
Magnetite ()*	Microcline ()*	Quartz ()*	Titanite ()*	Vermiculite ()*
Zircon ()*

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 Ba Bi C Ca F Fe H K Mg Na O P S Si Ti Zr

Elements from minerals reported directly at this locality: Al H O P

Structural Groups for minerals in this locality:
Alunite Analcime Apatite Baddeleyite Baryte Calcite Calzirtite Cancrinite Clay Corundum
Diaspore Feldspar Iron None Pyroxene Quartz Smectite-vermiculite Spinel Titanite Zircon

21 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
Aegirine ()*	Pyroxene	NaFe³⁺Si₂O₆			1	116855	1022
Aegirine-augite ()*	Pyroxene	(Ca,Na)(Fe³⁺,Mg,Fe²⁺)Si₂O₆			1	116855	286
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O			1	116855	1627
Augelite ()*	None	Al₂(PO₄)(OH)₃	66	2.6	0		79
Baddeleyite ()*	Baddeleyite	ZrO₂	66	2.6	1	116857	238
Baryte ()*	Baryte	Ba(SO₄)	66	2.6	1	116857	11547
Bismite ()*	None	Bi₂O₃			1	116862	214
Calcite ()*	Calcite	Ca(CO₃)			1	116855	27770
Calzirtite ()*	Calzirtite	Ca₂Zr₅Ti₂O₁₆	66	2.6	1	116856	32
Cancrinite ()*	Cancrinite	(Na,Ca, )₈(Al₆Si₆)O₂₄(CO₃,SO₄)₂·2H₂O			1	116855	232
Crandallite ()*	Alunite	CaAl₃(PO₄)(PO₃OH)(OH)₆	66	2.6	1	116857	310
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	66	2.6	1	116857	2740
Goethite ()*	Diaspore	FeO(OH)	66	2.6	1	116857	7437
Hematite ()*	Corundum	Fe₂O₃	66	2.6	1	116857	14640
Iron ()*	Iron	Fe			1	116861	1089
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	66	2.6	1	116857	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)			1	116855	4924
Quartz ()*	Quartz	SiO₂			1	116862	61156
Titanite ()*	Titanite	CaTi(SiO₄)O			1	116855	4899
Vermiculite ()*	Clay Smectite-vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄·8H₂O	66	2.6	2	116857,116863	652
Zircon ()*	Zircon	Zr(SiO₄)	66	2.6	1	116857	5251

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000400	carbonatite complex with transitional alkali basalt composition
Jen_0000642	MAGMATIC STYLE: Arcuate (?cone sheets) and irregular intrusions. ASSOCIATED SILICATE ROCKS: Melteigite, ijolite, pyroxenite, hornblendite, nepheline syenite, phoscorite, vent agglomerate, carbonated silicate rocks and K-rich fenites.
Jen_0000643	MAGMATIC STYLE: Arcuate (?cone sheets) and irregular intrusions. ASSOCIATED SILICATE ROCKS: Melteigite, ijolite, pyroxenite, hornblendite, nepheline syenite, phoscorite, vent agglomerate, carbonated silicate rocks and K-rich fenites.
Jen_0000644	MAGMATIC STYLE: Arcuate (?cone sheets) and irregular intrusions. ASSOCIATED SILICATE ROCKS: Melteigite, ijolite, pyroxenite, hornblendite, nepheline syenite, phoscorite, vent agglomerate, carbonated silicate rocks and K-rich fenites.

5 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Jen_0000400	27.5	22.5	25±2.5	K-Ar		274363	Bukusu Complex, Mbale District, Eastern Region, Uganda	Bukusu Complex	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000642	32.5	32.5	32.5			274363	Bukusu Complex, Mbale District, Eastern Region, Uganda	Bukusu	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000643	27.5	22.5	25±2.5	K-Ar	biotite	274363	Bukusu Complex, Mbale District, Eastern Region, Uganda	Bukusu	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000644	40	40	40	Nd, Sr		274363	Bukusu Complex, Mbale District, Eastern Region, Uganda	Bukusu	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
ree-00642	66	2.6	Tertiary			30485	Busumbu Deposit, Bukusu Complex, Mbale District, Eastern Region, Uganda	Bukusu Complex (Busumbu, Busumu, Busuku)	Orris and Grauch (2002)		USGSOFR02_189

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...