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:
Arusha Region, Tanzania

Oldest recorded age at locality: 610.6
Youngest recorded age at locality: 0

mindat Locality ID: 3246
mindat URL: http://www.mindat.org/loc-3246.html

Tectonic Settings:

Total number of sublocalities beneath "Arusha Region, Tanzania": 28
Total number of bottom-level sublocalities: 18

Number of Child Localities: 15
Child Localities:
Arusha
Deeti Volcanic Cone
Dumbawanga District
Engusero Sambu
Kerimasi Volcano
Ketito (Kiteto?)
Lake Manyara
Lake Natron
Longido
Minjingu Quarry
Mt Oldoinyo Lengai (Ol Doinyo Lengai)
Mundarara Mine (Mdarara)
Ngorongoro Conservation Area
Ngorongoro District
Sadiman Volcano

Latitude: 3°15'30"S
Longitude: 35°47'27"E
Decimal Degree (lat, lon): -3.2583333333333,35.790833333333

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.

Amorphous	Amphibole	Analcime	Apatite	Aphthitalite	Aragonite	Axinite	Baddeleyite	Baryte	Beryl
Calcite	Cancrinite-sodalite	Chalcopyrite	Chevkinite	Clay	Corundum	Diaspore	Djerfisherite	Epidote	Erionite
Eudialyte	Fairchildite	Feldspar	Fluorite	Garnet	Gypsum	Humite	Jorgkellerite	Lovozerite	Melilite
Mica	Natrolite	Nickeline	None	Not in a structural group	Olivine	Pentlandite	Perovskite	Phenakite	Pyroxene
Quartz	Rocksalt	Rutile	Sapphirine	Sodalite	Sphalerite	Spinel	Staurolite	Sulphur	Titanite
Tourmaline	Tridymite	Wollastonite	Wöhlerite

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 B Ba Be C Ca Ce Cl Cu F Fe H K Mg Mn Na Nb Ni O P Pb S Si Sr Ti Zn Zr

Elements from minerals reported directly at this locality: Al B Ca H Mg O Si

Structural Groups for minerals in this locality:
Amorphous Amphibole Analcime Apatite Aphthitalite Aragonite Axinite Baddeleyite Baryte Beryl
Calcite Cancrinite-sodalite Chalcopyrite Chevkinite Clay Corundum Diaspore Djerfisherite Epidote Erionite
Eudialyte Fairchildite Feldspar Fluorite Garnet Gypsum Humite Jorgkellerite Lovozerite Melilite
Mica Natrolite Nickeline None Not in a structural group Olivine Pentlandite Perovskite Phenakite Pyroxene
Quartz Rocksalt Rutile Sapphirine Sodalite Sphalerite Spinel Staurolite Sulphur Titanite
Tourmaline Tridymite Wollastonite Wöhlerite

107 IMA Minerals at location:

Aegirine ()*	Aegirine-augite ()*	Aenigmatite ()*	Alabandite ()*	Albite ()*
Alumoåkermanite ()*	Analcime ()*	Andradite ()*	Anhydrite ()*	Anorthite ()*
Aphthitalite ()*	Aragonite ()*	Augite ()*	Axinite-(Mg) ()*	Baddeleyite ()*
Baryte ()*	Barytolamprophyllite ()*	Beryl ()*	Calcite ()*	Celestine ()*
Cerianite-(Ce) ()*	Chalcopyrite ()*	Chevkinite-(Ce) ()*	Chondrodite ()*	Chrysoberyl ()*
Combeite ()*	Corundum ()*	Cuspidine ()*	Dawsonite ()*	Diaspore ()*
Diopside ()*	Djerfisherite ()*	Dolomite ()*	Dravite ()*	Erionite-Na ()*
Eudialyte ()*	Fluorapatite ()*	Fluorite ()*	Forsterite ()*	Franklinite ()*
Galena ()*	Gaylussite ()*	Götzenite ()*	Graphite ()*	Gregoryite ()*
Gypsum ()*	Halite ()*	Haüyne ()*	Hematite ()*	Hercynite ()*
Ilmenite ()*	Jacobsite ()*	Jörgkellerite ()*	Kalicinite ()*	Kerimasite ()*
Kimzeyite ()*	Kogarkoite ()*	Kyanite ()*	Lamprophyllite ()*	Larnite ()*
Magnesio-hastingsite ()*	Magnesioferrite ()*	Magnesite ()*	Magnetite ()*	Monohydrocalcite ()*
Monticellite ()*	Muscovite ()*	Nahcolite ()*	Natrolite ()*	Neighborite ()*
Nepheline ()*	Niocalite ()*	Nyerereite ()*	Omphacite ()*	Opal ()*
Oxo-magnesio-hastingsite ()*	Pargasite ()*	Pentlandite ()*	Perovskite ()*	Phenakite ()*
Phlogopite ()*	Pirssonite ()*	Pyrope ()*	Pyrrhotite ()*	Quartz ()*
Rutile ()*	Sanidine ()*	Schairerite ()*	Sellaite ()*	Shortite ()*
Sodalite ()*	Spessartine ()*	Sphalerite ()*	Spinel ()*	Staurolite ()*
Strontianite ()*	Sulphohalite ()*	Sulphur ()*	Sylvite ()*	Thénardite ()*
Thermonatrite ()*	Titanite ()*	Trona ()*	Villiaumite ()*	Witherite ()*
Wollastonite ()*	Zoisite ()*

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	0.015	0	2	115647,115651	1022
Aegirine-augite ()*	Pyroxene	(Ca,Na)(Fe³⁺,Mg,Fe²⁺)Si₂O₆	0.015	0	1	115647	286
Aenigmatite ()*	Sapphirine	Na₄[Fe²⁺₁₀Ti₂]O₄[Si₁₂O₃₆]	4.9	3.26	2	115651,115657	133
Alabandite ()*	Rocksalt	MnS	0.015	0	1	115647	312
Albite ()*	Feldspar	Na(AlSi₃O₈)			1	115648	8803
Alumoåkermanite ()*	Melilite	(Ca,Na)₂(Al,Mg,Fe²⁺)(Si₂O₇)	0.015	0	1	115647	7
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O			1	115650	1627
Andradite ()*	Garnet	Ca₃Fe³⁺₂(SiO₄)₃	0.015	0	1	115647	1534
Anhydrite ()*	Not in a structural group	Ca(SO₄)	0.015	0	1	115647	1588
Anorthite ()*	Feldspar	Ca(Al₂Si₂O₈)	610.6	609.4	1	115643	1036
Aphthitalite ()*	Aphthitalite	K₃Na(SO₄)₂	0.015	0	1	115647	77
Aragonite ()*	Aragonite	Ca(CO₃)			1	115642	3250
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	0.015	0	1	115647	2060
Axinite-(Mg) ()*	Axinite	Ca₄Mg₂Al₄[B₂Si₈O₃₀](OH)₂	610.6	0	0		12
Baddeleyite ()*	Baddeleyite	ZrO₂	0.6	0.4	1	115636	238
Baryte ()*	Baryte	Ba(SO₄)	0.6	0	2	115636,115647	11547
Barytolamprophyllite ()*	None	(BaK)Ti₂Na₃Ti(Si₂O₇)₂O₂(OH)₂	4.9	3.26	1	115657	21
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈			2	115634,115641	4286
Calcite ()*	Calcite	Ca(CO₃)	610.6	0	5	115636,115642,115645,115646,115647	27770
Celestine ()*	Baryte	Sr(SO₄)	0.015	0	1	115647	1252
Cerianite-(Ce) ()*	Fluorite	CeO₂	0.6	0.4	1	115636	94
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	4.9	3.26	2	115647,115657	27198
Chevkinite-(Ce) ()*	Chevkinite	Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂			1	115651	89
Chondrodite ()*	Humite	Mg₅(SiO₄)₂F₂			1	115641	285
Chrysoberyl ()*	Olivine	BeAl₂O₄			2	115634,115641	321
Combeite ()*	Lovozerite	Na_4.5Ca_3.5Si₆O_17.5(OH)_0.5	0.015	0	1	115647	3
Corundum ()*	Corundum	Al₂O₃	610.6	609.4	6	115634,115639,115641,115643,115645,115648	1797
Cuspidine ()*	Wöhlerite	Ca₈(Si₂O₇)₂F₄	4.9	3.26	2	115647,115657	67
Dawsonite ()*	None	NaAl(CO₃)(OH)₂			1	115650	90
Diaspore ()*	Diaspore	AlO(OH)			1	115648	481
Diopside ()*	Pyroxene	CaMgSi₂O₆	4.9	3.26	3	115632,115647,115657	4135
Djerfisherite ()*	Djerfisherite	K₆(Fe,Cu,Ni)₂₅S₂₆Cl	0.015	0	1	115647	60
Dolomite ()*	None	CaMg(CO₃)₂	0.6	0.4	2	115636,115646	9895
Dravite ()*	Tourmaline	NaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)			2	115635,115656	648
Erionite-Na ()*	Erionite	Na₁₀[Si₂₆Al₁₀O₇₂]·30H₂O			1	115642	13
Eudialyte ()*	Eudialyte	Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂			1	115651	182
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	0.6	0	3	115636,115646,115647	2740
Fluorite ()*	Fluorite	CaF₂	4.9	3.26	3	115642,115647,115657	9617
Forsterite ()*	Olivine	Mg₂(SiO₄)	0.6	0	2	115636,115647	1188
Franklinite ()*	Spinel	ZnFe³⁺₂O₄	0.6	0.4	1	115636	52
Galena ()*	Rocksalt	PbS	4.9	3.26	2	115647,115657	24243
Gaylussite ()*	None	Na₂Ca(CO₃)₂·5H₂O	0.015	0	2	115642,115647	57
Götzenite ()*	None	Ca₄NaCa₂Ti(Si₂O₇)₂(OF)F₂	4.9	3.26	1	115657	27
Graphite ()*	None	C			1	115648	2812
Gregoryite ()*	None	Na₂(CO₃)	0.015	0	1	115647	3
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	0.015	0	1	115647	6890
Halite ()*	Rocksalt	NaCl	0.015	0	2	115642,115647	1398
Haüyne ()*	Sodalite Cancrinite-sodalite	Na₃Ca(Si₃Al₃)O₁₂(SO₄)	0.015	0	1	115647	158
Hematite ()*	Corundum	Fe₂O₃			1	115656	14640
Hercynite ()*	Spinel	Fe²⁺Al₂O₄	610.6	609.4	1	115645	407
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	4.9	3.26	1	115657	5433
Jacobsite ()*	Spinel	Mn²⁺Fe³⁺₂O₄	0.6	0.4	1	115636	172
Jörgkellerite ()*	Jorgkellerite	Na₃Mn³⁺₃(PO₄)₂(CO₃)O₂·5H₂O	0.015	0	1	115647	1
Kalicinite ()*	None	KH(CO₃)	0.015	0	1	115647	7
Kerimasite ()*	Garnet	Ca₃Zr₂(SiFe³⁺₂)O₁₂	0.6	0.4	3	115636,115637,115638	8
Kimzeyite ()*	Garnet	Ca₃Zr₂(SiAl₂)O₁₂	0.6	0.4	1	115636	17
Kogarkoite ()*	None	Na₃(SO₄)F	0.015	0	2	115642,115647	14
Kyanite ()*	Not in a structural group	Al₂OSiO₄			3	115653,115655,115656	1507
Lamprophyllite ()*	None	(SrNa)Ti₂Na₃Ti(Si₂O₇)₂O₂(OH)₂	0.015	0	1	115647	63
Larnite ()*	Not in a structural group	Ca₂(SiO₄)	0.015	0	1	115647	48
Magnesio-hastingsite ()*	Amphibole	NaCa₂(Mg₄Fe³⁺)(Si₆Al₂)O₂₂(OH)₂			1	115632	80
Magnesioferrite ()*	Spinel	MgFe³⁺₂O₄	0.6	0.4	1	115636	98
Magnesite ()*	Calcite	Mg(CO₃)	610.6	609.4	1	115645	1487
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	4.9	3.26	4	115636,115647,115653,115657	14899
Monohydrocalcite ()*	None	Ca(CO₃)·H₂O	0.015	0	1	115647	55
Monticellite ()*	Olivine	CaMg(SiO₄)	0.015	0	1	115647	153
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	0.015	0	5	115646,115647,115648,115655,115656	17380
Nahcolite ()*	None	NaH(CO₃)	0.015	0	1	115647	78
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O			1	115650	1236
Neighborite ()*	Perovskite	NaMgF₃	0.015	0	1	115647	17
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	4.9	3.26	4	115636,115647,115650,115657	884
Niocalite ()*	Wöhlerite	Ca₇Nb(Si₂O₇)₂O₃F	0.015	0	1	115647	3
Nyerereite ()*	Fairchildite	Na₂Ca(CO₃)₂	0.6	0	2	115636,115647	18
Omphacite ()*	Pyroxene	(Ca,Na)(Mg,Fe,Al)Si₂O₆	610.6	609.4	1	115645	229
Opal ()*	Amorphous	SiO₂·nH₂O			1	115634	2994
Oxo-magnesio-hastingsite ()*	Amphibole	NaCa₂(Mg₂Fe³⁺₃)(Si₆Al₂)O₂₂O₂			1	115632	3
Pargasite ()*	Amphibole	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂	610.6	609.4	3	115643,115645,115648	313
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈	0.015	0	1	115647	1512
Perovskite ()*	Perovskite	CaTiO₃	4.9	3.26	3	115636,115647,115657	495
Phenakite ()*	Phenakite	Be₂(SiO₄)			1	115641	326
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	610.6	0	5	115632,115641,115643,115647,115648	2273
Pirssonite ()*	None	Na₂Ca(CO₃)₂·2H₂O	0.015	0	1	115647	19
Pyrope ()*	Garnet	Mg₃Al₂(SiO₄)₃	610.6	609.4	1	115645	341
Pyrrhotite ()*	Nickeline	Fe₇S₈	4.9	3.26	3	115636,115647,115657	9056
Quartz ()*	Quartz	SiO₂	2.2	0	7	115631,115641,115646,115647,115651,115655,115656	61156
Rutile ()*	Rutile	TiO₂			2	115641,115656	5614
Sanidine ()*	Feldspar	K(AlSi₃O₈)	4.9	3.26	2	115647,115657	598
Schairerite ()*	None	Na₂₁(SO₄)₇ClF₆	0.015	0	1	115647	4
Sellaite ()*	Rutile	MgF₂	0.015	0	1	115647	46
Shortite ()*	None	Na₂Ca₂(CO₃)₃	0.015	0	1	115647	37
Sodalite ()*	Cancrinite-sodalite Sodalite	Na₄(Si₃Al₃)O₁₂Cl	4.9	3.26	3	115647,115651,115657	444
Spessartine ()*	Garnet	Mn²⁺₃Al₂(SiO₄)₃			2	115655,115656	1214
Sphalerite ()*	Sphalerite	ZnS	0.015	0	1	115647	21482
Spinel ()*	Spinel	MgAl₂O₄	0.015	0	2	115641,115647	1934
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)			1	115653	978
Strontianite ()*	Aragonite	Sr(CO₃)	0.6	0.4	1	115636	589
Sulphohalite ()*	None	Na₆(SO₄)₂ClF	0.6	0.4	1	115636	4
Sulphur ()*	Sulphur	S	0.015	0	1	115647	2045
Sylvite ()*	Rocksalt	KCl	0.015	0	1	115647	275
Thénardite ()*	None	Na₂(SO₄)	0.015	0	1	115647	299
Thermonatrite ()*	None	Na₂(CO₃)·H₂O	0.015	0	2	115642,115647	64
Titanite ()*	Titanite	CaTi(SiO₄)O	4.9	3.26	2	115647,115657	4899
Trona ()*	None	Na₃(HCO₃)(CO₃)·2H₂O	0.015	0	2	115642,115647	129
Villiaumite ()*	Rocksalt	NaF	0.015	0	1	115647	31
Witherite ()*	Aragonite	Ba(CO₃)	0.015	0	1	115647	251
Wollastonite ()*	Wollastonite	CaSiO₃	4.9	3.26	2	115647,115657	1247
Zoisite ()*	Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)	610.6	609.4	3	115643,115645,115648	1025

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000425	carbonatite complex
Jen_0000428	carbonatite complex
Jen_0000430	carbonatite complex
Jen_0000432	carbonatite complex
Jen_0000433	carbonatite complex
Jen_0000559	MAGMATIC STYLE: Lava flows and tuffs. ASSOCIATED SILICATE ROCKS: Phonolitic and nephelinitic tuffs and rare lavas including rare combeite- and melilite-bearing types. Xenolithic blocks include pyroxenite, ijolite series rocks, nepheline syenite and fenite.
Jen_0000576	MAGMATIC STYLE: Tuffs on the Eyasi Plateau probably emanated from Sadiman and include the Laetoli Beds which contain approximately 25 carbonatite and 35 melilitite-carbonatite air-fall layers. ASSOCIATED SILICATE ROCKS: Nephelinitic tuffs and agglomerates with subsidiary lavas of nephelinite, melilite nephelinite, phonolitic trachyte and sodalite phonolite.
Jen_0000577	MAGMATIC STYLE: Tuffs on the Eyasi Plateau probably emanated from Sadiman and include the Laetoli Beds which contain approximately 25 carbonatite and 35 melilitite-carbonatite air-fall layers. ASSOCIATED SILICATE ROCKS: Nephelinitic tuffs and agglomerates with subsidiary lavas of nephelinite, melilite nephelinite, phonolitic trachyte and sodalite phonolite.
Jen_0000578	MAGMATIC STYLE: Tuffs on the Eyasi Plateau probably emanated from Sadiman and include the Laetoli Beds which contain approximately 25 carbonatite and 35 melilitite-carbonatite air-fall layers. ASSOCIATED SILICATE ROCKS: Nephelinitic tuffs and agglomerates with subsidiary lavas of nephelinite, melilite nephelinite, phonolitic trachyte and sodalite phonolite.
Michelle_0058	Active volcano that produces natrocarbonatite lava.
Michelle_0066	Active volcano that produces natrocarbonatite lava. Jorgkellerite occurs as a rare alteration mineral.

12 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
Jen_0000428	2.15	2.03	2.09±0.06					283002	Arusha, Arusha Region, Tanzania	Arusha	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000430	2.2	2.1	2.15±0.05	K-Ar				283002	Arusha, Arusha Region, Tanzania	Arusha	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000425	0.6	0.4	0.6-0.4					208416	Kerimasi Volcano, Arusha Region, Tanzania	Kerimasi	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0001538	610.6	609.4	610 ± 0.6	U-Pb	age of formation of protolith ruby	zircon	Zircon	211915	Ruby Occurrence, Muriatata Hills, Longido, Arusha Region, Tanzania	Longido Ruby Occurence	Giuliani et al. (2007)		GOGD37_23
Jen_0000559	0	0	0					14962	Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania	Oldoinyo Lengai	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Michelle_0058	0.005	0.002	0.005-0.002	Stratigraphy	Age of natrocarbonatite			14962	Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania	Mt Oldoinyo Lengai	Hay (1989)	10.1016/0377-0273(89)90114-5	JVGR37_77	Oldest recognizable natrocarbonatite deposit at locality. Cone building began approximately 15,000 years ago but not evident that the gregoryite bearing natrocarbonatite was present.
Michelle_0066	0.015	0	0.015-0.0		Age of Mt Oldoinyo Lengai volcanic activity			14962	Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania	Mt Oldoinyo Lengai	Hay (1989)	10.1016/0377-0273(89)90114-5	JVGR37_77	Volcano is still active. Cone building began approximately 15,000 years ago.
Jen_0000432	3.38	3.26	3.32±0.06	K-Ar				240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman Complex	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000433	4.9	4.1	4.5±0.4	K-Ar				240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman Complex	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000576	3.91	3.91	3.91					240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000577	3.38	3.26	3.32±0.06	K-Ar				240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000578	4.9	4.1	4.5±0.4	K-Ar				240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796

Sample	Source Locality	Reference URL
FKM-68	Longido, Arusha Region, Tanzania	https://www.rockptx.com/fkm-51-to-fkm-75/#FKM-68

All locality data graciously provided by mindat.org

All age data...