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:
Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania

Oldest recorded age at locality: 0.015
Youngest recorded age at locality: 0

mindat Locality ID: 14962
mindat URL: http://www.mindat.org/loc-14962.html

Tectonic Settings:

Total number of sublocalities beneath "Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania": 0
Total number of bottom-level sublocalities: 0

Latitude: 2°45'"S
Longitude: 35°55'59"E
Decimal Degree (lat, lon): -2.75,35.933055555556

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.

Apatite	Aphthitalite	Aragonite	Baryte	Calcite	Cancrinite-sodalite	Chalcopyrite	Clay	Djerfisherite	Fairchildite
Feldspar	Fluorite	Garnet	Gypsum	Jorgkellerite	Lovozerite	Melilite	Mica	Nickeline	None
Not in a structural group	Olivine	Pentlandite	Perovskite	Pyroxene	Quartz	Rocksalt	Rutile	Sodalite	Sphalerite
Spinel	Sulphur	Titanite	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 Ba C Ca Cl Cu F Fe H K Mg Mn Na Nb Ni O P Pb S Si Sr Ti Zn

Elements from minerals reported directly at this locality: Al Ba C Ca Cl Cu F Fe H K Mg Mn Na Nb Ni O P Pb S Si Sr Ti Zn

Structural Groups for minerals in this locality:
Apatite Aphthitalite Aragonite Baryte Calcite Cancrinite-sodalite Chalcopyrite Clay Djerfisherite Fairchildite
Feldspar Fluorite Garnet Gypsum Jorgkellerite Lovozerite Melilite Mica Nickeline None
Not in a structural group Olivine Pentlandite Perovskite Pyroxene Quartz Rocksalt Rutile Sodalite Sphalerite
Spinel Sulphur Titanite Tridymite Wollastonite Wöhlerite

61 IMA Minerals at location:

Aegirine ()*	Aegirine-augite ()*	Alabandite ()*	Alumoåkermanite ()*	Andradite ()*
Anhydrite ()*	Aphthitalite ()*	Augite ()*	Baryte ()*	Calcite ()*
Celestine ()*	Chalcopyrite ()*	Combeite ()*	Cuspidine ()*	Diopside ()*
Djerfisherite ()*	Fluorapatite ()*	Fluorite ()*	Forsterite ()*	Galena ()*
Gaylussite ()*	Gregoryite ()*	Gypsum ()*	Halite ()*	Haüyne ()*
Jörgkellerite ()*	Kalicinite ()*	Kogarkoite ()*	Lamprophyllite ()*	Larnite ()*
Magnetite ()*	Monohydrocalcite ()*	Monticellite ()*	Muscovite ()*	Nahcolite ()*
Neighborite ()*	Nepheline ()*	Niocalite ()*	Nyerereite ()*	Pentlandite ()*
Perovskite ()*	Phlogopite ()*	Pirssonite ()*	Pyrrhotite ()*	Quartz ()*
Sanidine ()*	Schairerite ()*	Sellaite ()*	Shortite ()*	Sodalite ()*
Sphalerite ()*	Spinel ()*	Sulphur ()*	Sylvite ()*	Thénardite ()*
Thermonatrite ()*	Titanite ()*	Trona ()*	Villiaumite ()*	Witherite ()*
Wollastonite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	# of localities containing mineral
Aegirine ()*	Pyroxene	NaFe³⁺Si₂O₆	0.015	1022
Aegirine-augite ()*	Pyroxene	(Ca,Na)(Fe³⁺,Mg,Fe²⁺)Si₂O₆	0.015	286
Alabandite ()*	Rocksalt	MnS	0.015	312
Alumoåkermanite ()*	Melilite	(Ca,Na)₂(Al,Mg,Fe²⁺)(Si₂O₇)	0.015	7
Andradite ()*	Garnet	Ca₃Fe³⁺₂(SiO₄)₃	0.015	1534
Anhydrite ()*	Not in a structural group	Ca(SO₄)	0.015	1588
Aphthitalite ()*	Aphthitalite	K₃Na(SO₄)₂	0.015	77
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	0.015	2060
Baryte ()*	Baryte	Ba(SO₄)	0.015	11547
Calcite ()*	Calcite	Ca(CO₃)	0.015	27770
Celestine ()*	Baryte	Sr(SO₄)	0.015	1252
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	0.015	27198
Combeite ()*	Lovozerite	Na_4.5Ca_3.5Si₆O_17.5(OH)_0.5	0.015	3
Cuspidine ()*	Wöhlerite	Ca₈(Si₂O₇)₂F₄	0.015	67
Diopside ()*	Pyroxene	CaMgSi₂O₆	0.015	4135
Djerfisherite ()*	Djerfisherite	K₆(Fe,Cu,Ni)₂₅S₂₆Cl	0.015	60
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	0.015	2740
Fluorite ()*	Fluorite	CaF₂	0.015	9617
Forsterite ()*	Olivine	Mg₂(SiO₄)	0.015	1188
Galena ()*	Rocksalt	PbS	0.015	24243
Gaylussite ()*	None	Na₂Ca(CO₃)₂·5H₂O	0.015	57
Gregoryite ()*	None	Na₂(CO₃)	0.015	3
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	0.015	6890
Halite ()*	Rocksalt	NaCl	0.015	1398
Haüyne ()*	Sodalite Cancrinite-sodalite	Na₃Ca(Si₃Al₃)O₁₂(SO₄)	0.015	158
Jörgkellerite ()*	Jorgkellerite	Na₃Mn³⁺₃(PO₄)₂(CO₃)O₂·5H₂O	0.015	1
Kalicinite ()*	None	KH(CO₃)	0.015	7
Kogarkoite ()*	None	Na₃(SO₄)F	0.015	14
Lamprophyllite ()*	None	(SrNa)Ti₂Na₃Ti(Si₂O₇)₂O₂(OH)₂	0.015	63
Larnite ()*	Not in a structural group	Ca₂(SiO₄)	0.015	48
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	0.015	14899
Monohydrocalcite ()*	None	Ca(CO₃)·H₂O	0.015	55
Monticellite ()*	Olivine	CaMg(SiO₄)	0.015	153
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	0.015	17380
Nahcolite ()*	None	NaH(CO₃)	0.015	78
Neighborite ()*	Perovskite	NaMgF₃	0.015	17
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	0.015	884
Niocalite ()*	Wöhlerite	Ca₇Nb(Si₂O₇)₂O₃F	0.015	3
Nyerereite ()*	Fairchildite	Na₂Ca(CO₃)₂	0.015	18
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈	0.015	1512
Perovskite ()*	Perovskite	CaTiO₃	0.015	495
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	0.015	2273
Pirssonite ()*	None	Na₂Ca(CO₃)₂·2H₂O	0.015	19
Pyrrhotite ()*	Nickeline	Fe₇S₈	0.015	9056
Quartz ()*	Quartz	SiO₂	0.015	61156
Sanidine ()*	Feldspar	K(AlSi₃O₈)	0.015	598
Schairerite ()*	None	Na₂₁(SO₄)₇ClF₆	0.015	4
Sellaite ()*	Rutile	MgF₂	0.015	46
Shortite ()*	None	Na₂Ca₂(CO₃)₃	0.015	37
Sodalite ()*	Cancrinite-sodalite Sodalite	Na₄(Si₃Al₃)O₁₂Cl	0.015	444
Sphalerite ()*	Sphalerite	ZnS	0.015	21482
Spinel ()*	Spinel	MgAl₂O₄	0.015	1934
Sulphur ()*	Sulphur	S	0.015	2045
Sylvite ()*	Rocksalt	KCl	0.015	275
Thénardite ()*	None	Na₂(SO₄)	0.015	299
Thermonatrite ()*	None	Na₂(CO₃)·H₂O	0.015	64
Titanite ()*	Titanite	CaTi(SiO₄)O	0.015	4899
Trona ()*	None	Na₃(HCO₃)(CO₃)·2H₂O	0.015	129
Villiaumite ()*	Rocksalt	NaF	0.015	31
Witherite ()*	Aragonite	Ba(CO₃)	0.015	251
Wollastonite ()*	Wollastonite	CaSiO₃	0.015	1247

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
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.
Michelle_0058	Active volcano that produces natrocarbonatite lava.
Michelle_0066	Active volcano that produces natrocarbonatite lava. Jorgkellerite occurs as a rare alteration mineral.

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
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.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...