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

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Mt Oldoinyo Lengai - view from the Natron lake.

Mt Oldoinyo Lengai, Arusha Region, Tanzania
Strombolian eruption of the new crater of the volcano 08.10.2017

Mt Oldoinyo Lengai, Arusha Region, Tanzania
Mt Oldoinyo Lengai - view from the Natron lake.

Mt Oldoinyo Lengai, Arusha Region, Tanzania
Strombolian eruption of the new crater of the volcano 08.10.2017

Mt Oldoinyo Lengai, Arusha Region, Tanzania
Mt Oldoinyo Lengai - view from the Natron lake.

Mt Oldoinyo Lengai, Arusha Region, Tanzania
Latitude & Longitude (WGS84): 2° 45' 0'' South , 35° 55' 59'' East
Latitude & Longitude (decimal): -2.75000,35.93333
GeoHash:G#: kz983emu5
Locality type:Mountain
Köppen climate type:Aw : Tropical savanna, wet


The world's only active carbonatite volcano, with jacupirangite, nepheline syenite and other rocks. Extremely alkali-rich lava, 30 % Na2O.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Mt Oldoinyo Lengai, Arusha Region, Tanzania

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


61 valid minerals. 4 (TL) - type locality of valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Aegirine
Formula: NaFe3+Si2O6
Reference: Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Reference: Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384
Alabandite
Formula: MnS
Description: "Fe-alabandite"
Reference: Mitchell, R.H. (2000) "The July 2000 expedition to the natrocarbonatite volcano Oldoinyo Lengai. Newsletter of the Mineralogical Association of Canada, # 63 (Dec. 2000).; Mineralogical Magazine 1997 61 : 779-789; Mitchell, R. H. (1997). Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine, 61(6), 779-789.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Jago, B. C., & Gittins, J. (1999). Mn-and F-bearing rasvumite in natrocarbonatite at Oldoinyo Lengai volcano, Tanzania. Mineralogical Magazine, 63(1), 53-55.
Alumoåkermanite (TL)
Formula: (Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
Reference: Wiedenmann, D., Zaitsev A.N., Britvin S.N., Krivovichev, S.V., Keller, J. (2009): Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine, 73, 373-384.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: www.koeln.netsurf.de/~w.steffens/other.htm; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Andradite var: Melanite
Formula: Ca3Fe3+2(SiO4)3
Reference: Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384
Anhydrite
Formula: CaSO4
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
'Apatite'
Reference: www.koeln.netsurf.de/~w.steffens/other.htm; Mineralogical Magazine 1997 61 : 779-789; Mitchell, R. H. (1997). Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine, 61(6), 779-789.
Aphthitalite
Formula: (K,Na)3Na(SO4)2
Reference: Mitchell, R.H. (2006) Mineralogy of stalactites formed by subaerial weathering of natrocarbonatite hornitos at Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 70: 437-444
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Baryte
Formula: BaSO4
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Calcite
Formula: CaCO3
Reference: Keller, J., & Zaitsev, A. N. (2006). Calciocarbonatite dykes at Oldoinyo Lengai, Tanzania: the fate of natrocarbonatite. The Canadian Mineralogist, 44(4), 857-876.; Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Celestine
Formula: SrSO4
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Chalcopyrite
Formula: CuFeS2
Reference: Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
'Clinopyroxene Subgroup'
Reference: Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Combeite
Formula: Na4.5Ca3.5Si6O17.5(OH)0.5
Reference: www.koeln.netsurf.de/~w.steffens/other.htm; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.; Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384
Cuspidine
Formula: Ca4(Si2O7)(F,OH)2
Description: Occurs in a solid solution with niocalite.
Reference: Mitchell, R.H. and Belton, F. (2004) Niocalite-cuspidine solid solution and manganoan monticellite from natrocarbonatite, Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 68: 787-799.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Diopside
Formula: CaMgSi2O6
Reference: Zaitsev (2012): Mineral chemistry and crystal structure of haüyne from the Oldoinyo Lengai volcano, northern Tanzania. Eifel-Symposium 2012, "Variability and complexity of minerals and their synthetic analogues of the Vulkaneifel and related provinces”, Christian Albrechts University, Kiel, 23.04. - 30.04.2012. ; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Djerfisherite
Formula: K6(Fe,Cu,Ni)25S26Cl
Reference: Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Keller, J., & Zaitsev, A. N. (2006). Calciocarbonatite dykes at Oldoinyo Lengai, Tanzania: the fate of natrocarbonatite. The Canadian Mineralogist, 44(4), 857-876.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Fluorite
Formula: CaF2
Reference: Mitchell, R.H. (2000) "The July 2000 expedition to the natrocarbonatite volcano Oldoinyo Lengai. Newsletter of the Mineralogical Association of Canada, # 63 (Dec. 2000).; Mineralogical Magazine 1997 61 : 779-789; Keller, J., & Zaitsev, A. N. (2006). Calciocarbonatite dykes at Oldoinyo Lengai, Tanzania: the fate of natrocarbonatite. The Canadian Mineralogist, 44(4), 857-876.; Mitchell, R. H. (1997). Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine, 61(6), 779-789.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Forsterite
Formula: Mg2SiO4
Reference: Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Galena
Formula: PbS
Reference: Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Gaylussite
Formula: Na2Ca(CO3)2 · 5H2O
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Gregoryite (TL)
Formula: (Na2,K2,Ca)CO3
Reference: Lithos 13 (1980), 213; American Mineralogist, 66, pp. 879 (1981); Mineralogical Magazine 1997 61 : 779-789; Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.; Mitchell, R. H. (1997). Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine, 61(6), 779-789.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Gypsum
Formula: CaSO4 · 2H2O
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Halite
Formula: NaCl
Reference: Mitchell, R.H. (2006) Mineralogy of stalactites formed by subaerial weathering of natrocarbonatite hornitos at Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 70: 437-444; Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Haüyne
Formula: (Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
Reference: Zaitsev (2012): Mineral chemistry and crystal structure of haüyne from the Oldoinyo Lengai volcano, northern Tanzania. Eifel-Symposium 2012, "Variability and complexity of minerals and their synthetic analogues of the Vulkaneifel and related provinces”, Christian Albrechts University, Kiel, 23.04. - 30.04.2012.
Jörgkellerite (TL)
Formula: (Na,☐)3Mn3+3(PO4)2(CO3)(O,OH)2·5H2O
Reference: Zaitsev, A.N., Britvin, S.N., Kearsley, A., Wenzel, T. and Kirk, C. (2015) Jörgkellerite, IMA 2015-020. CNMNC Newsletter No. 26, August 2015, page 942; Mineralogical Magazine, 79, 941-947; Zaitsev, A.N., Britvin, S.N., Kearsley, A., Wenzel, T., Kirk, C. (2017): Jörgkellerite, Na3Mn3+3(PO4)2(CO3)O2·5H2O, a new layered phosphate-carbonate mineral from the Oldoinyo Lengai volcano, Gregory rift, northern Tanzania. Mineralogy and Petrology 111, 373–381.
Kalicinite
Formula: KHCO3
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Kogarkoite
Formula: Na3(SO4)F
Reference: Mitchell, R.H. (2006) Mineralogy of stalactites formed by subaerial weathering of natrocarbonatite hornitos at Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 70: 437-444
Lamprophyllite
Formula: (Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
Reference: www.koeln.netsurf.de/~w.steffens/other.htm
Larnite
Formula: Ca2SiO4
Reference: Martínez-Frías, J., Benito, R., Wilson, G., Delgado, A., Boyd, T., and Marti, K. (2004): Journal of Materials Processing Technology 147, 204–210.; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Zaitsev (2012): Mineral chemistry and crystal structure of haüyne from the Oldoinyo Lengai volcano, northern Tanzania. Eifel-Symposium 2012, "Variability and complexity of minerals and their synthetic analogues of the Vulkaneifel and related provinces”, Christian Albrechts University, Kiel, 23.04. - 30.04.2012. ; Keller, J., & Zaitsev, A. N. (2006). Calciocarbonatite dykes at Oldoinyo Lengai, Tanzania: the fate of natrocarbonatite. The Canadian Mineralogist, 44(4), 857-876.; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Magnetite var: Titaniferous Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
Reference: Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
'Melilite Group'
Formula: Ca2M(XSiO7)
Reference: Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384
Monohydrocalcite
Formula: CaCO3 · H2O
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Monticellite
Formula: CaMgSiO4
Description: Manganoan variety.
Reference: Mitchell, R.H. and Belton, F. (2004) Niocalite-cuspidine solid solution and manganoan monticellite from natrocarbonatite, Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 68: 787-799.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Nahcolite
Formula: NaHCO3
Reference: Mitchell, R.H. (2006) Mineralogy of stalactites formed by subaerial weathering of natrocarbonatite hornitos at Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 70: 437-444; Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
'Natrocarbonatite'
Reference: Jago, B. C., & Gittins, J. (1999). Mn-and F-bearing rasvumite in natrocarbonatite at Oldoinyo Lengai volcano, Tanzania. Mineralogical Magazine, 63(1), 53-55.
Neighborite
Formula: NaMgF3
Reference: Mitchell, R.H. (1997) Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine: 61: 779-789.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Nepheline
Formula: Na3K(Al4Si4O16)
Reference: www.koeln.netsurf.de/~w.steffens/other.htm; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.; Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Niocalite
Formula: (Ca,Nb)4(Si2O7)(O,OH,F)2
Description: Occurs in a solid solution with cuspidine.
Reference: Mitchell, R.H. and Belton, F. (2004) Niocalite-cuspidine solid solution and manganoan monticellite from natrocarbonatite, Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 68: 787-799.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Nyerereite (TL)
Formula: Na2Ca(CO3)2
Description: Carbonatite lava, 1963 flow.
Reference: McKie, D., Frankis, E.J. (1977) Nyerereite: A new volcanic carbonate mineral from Oldoinyo Lengai, Tanzania. Zeitschrift für Kristallographie: 145: 73-95.; Geol.Soc.Amer.,Progr. Annual. Meet.(1968) 202; Mineralogical Magazine 1997 61 : 779-789; Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Pentlandite
Formula: (FexNiy)Σ9S8
Reference: Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Perovskite
Formula: CaTiO3
Reference: www.koeln.netsurf.de/~w.steffens/other.htm; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Pirssonite
Formula: Na2Ca(CO3)2 · 2H2O
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Pyrrhotite
Formula: Fe7S8
Reference: Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Quartz
Formula: SiO2
Reference: Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Sanidine
Formula: K(AlSi3O8)
Reference: Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Schairerite
Formula: Na21(SO4)7ClF6
Reference: Mitchell, R.H. (2006) Mineralogy of stalactites formed by subaerial weathering of natrocarbonatite hornitos at Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 70: 437-444
Sellaite
Formula: MgF2
Reference: Mineralogical Magazine 1997 61 : 779-789; Mitchell, R. H. (1997). Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine, 61(6), 779-789.
Shortite
Formula: Na2Ca2(CO3)3
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Sodalite
Formula: Na8(Al6Si6O24)Cl2
Reference: www.koeln.netsurf.de/~w.steffens/other.htm; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.; Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384
Sphalerite
Formula: ZnS
Reference: Mineralogical Magazine 1997 61 : 779-789; Mitchell, R. H. (1997). Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine, 61(6), 779-789.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Spinel
Formula: MgAl2O4
Reference: www.koeln.netsurf.de/~w.steffens/other.htm; Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384
Sulphur
Formula: S8
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Sylvite
Formula: KCl
Reference: Mitchell, R.H. (2006) Mineralogy of stalactites formed by subaerial weathering of natrocarbonatite hornitos at Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 70: 437-444; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.; Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.; Mitchell, R. H. (1997). Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine, 61(6), 779-789.; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
'Thénardite'
Formula: Na2SO4
Reference: Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Thermonatrite
Formula: Na2CO3 · H2O
Reference: Mitchell, R.H. (2006) Mineralogy of stalactites formed by subaerial weathering of natrocarbonatite hornitos at Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 70: 437-444; Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Tilleyite ?
Formula: Ca5(Si2O7)(CO3)2
Reference: Mineralogical Magazine 1997 61 : 779-789; Mitchell, R. H. (1997). Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine, 61(6), 779-789.
Titanite
Formula: CaTi(SiO4)O
Reference: www.koeln.netsurf.de/~w.steffens/other.htm; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.; Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Trona
Formula: Na3H(CO3)2 · 2H2O
Reference: Mitchell, R.H. (2006) Mineralogy of stalactites formed by subaerial weathering of natrocarbonatite hornitos at Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 70: 437-444; Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Villiaumite
Formula: NaF
Reference: Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Witherite
Formula: BaCO3
Reference: Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
Wollastonite
Formula: CaSiO3
Reference: www.koeln.netsurf.de/~w.steffens/other.htm; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.; Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J (2009) Alumoåkermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania. Mineralogical Magazine 73, 373-384; Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Sulphur1.CC.05S8
Group 2 - Sulphides and Sulfosalts
'Alabandite'2.CD.10MnS
'Chalcopyrite'2.CB.10aCuFeS2
'Djerfisherite'2.FC.05K6(Fe,Cu,Ni)25S26Cl
'Galena'2.CD.10PbS
Pentlandite2.BB.15(FexNiy)Σ9S8
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 3 - Halides
'Fluorite'3.AB.25CaF2
'Halite'3.AA.20NaCl
Neighborite3.AA.35NaMgF3
Sellaite3.AB.15MgF2
Sylvite3.AA.20KCl
Villiaumite3.AA.20NaF
Group 4 - Oxides and Hydroxides
'Magnetite'4.BB.05Fe2+Fe3+2O4
var: Titaniferous Magnetite4.BB.05Fe2+(Fe3+,Ti)2O4
Perovskite4.CC.30CaTiO3
Quartz4.DA.05SiO2
Spinel4.BB.05MgAl2O4
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
'Gaylussite'5.CB.35Na2Ca(CO3)2 · 5H2O
'Gregoryite' (TL)5.AA.10(Na2,K2,Ca)CO3
'Kalicinite'5.AA.20KHCO3
Monohydrocalcite5.CB.20CaCO3 · H2O
Nahcolite5.AA.15NaHCO3
Nyerereite (TL)5.AC.10Na2Ca(CO3)2
Pirssonite5.CB.30Na2Ca(CO3)2 · 2H2O
Shortite5.AC.25Na2Ca2(CO3)3
Thermonatrite5.CB.05Na2CO3 · H2O
Trona5.CB.15Na3H(CO3)2 · 2H2O
Witherite5.AB.15BaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Anhydrite'7.AD.30CaSO4
'Aphthitalite'7.AC.35(K,Na)3Na(SO4)2
'Baryte'7.AD.35BaSO4
'Celestine'7.AD.35SrSO4
'Gypsum'7.CD.40CaSO4 · 2H2O
'Kogarkoite'7.BD.15Na3(SO4)F
Schairerite7.BD.10Na21(SO4)7ClF6
Thénardite7.AC.25Na2SO4
Group 8 - Phosphates, Arsenates and Vanadates
'Fluorapatite'8.BN.05Ca5(PO4)3F
Group 9 - Silicates
'Aegirine'9.DA.25NaFe3+Si2O6
'Aegirine-augite'9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
'Alumoåkermanite' (TL)9.BB.10(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
'Andradite'9.AD.25Ca3Fe3+2(SiO4)3
var: Melanite9.AD.25Ca3Fe3+2(SiO4)3
'Augite'9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
'Combeite'9.CJ.15aNa4.5Ca3.5Si6O17.5(OH)0.5
'Cuspidine'9.BE.17Ca4(Si2O7)(F,OH)2
'Diopside'9.DA.15CaMgSi2O6
'Forsterite'9.AC.05Mg2SiO4
'Haüyne'9.FB.10(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
'Lamprophyllite'9.BE.25(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
'Larnite'9.AD.05Ca2SiO4
Monticellite9.AC.10CaMgSiO4
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Nepheline9.FA.05Na3K(Al4Si4O16)
Niocalite9.BE.17(Ca,Nb)4(Si2O7)(O,OH,F)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Sanidine9.FA.30K(AlSi3O8)
Sodalite9.FB.10Na8(Al6Si6O24)Cl2
Tilleyite ?9.BE.82Ca5(Si2O7)(CO3)2
Titanite9.AG.15CaTi(SiO4)O
Wollastonite9.DG.05CaSiO3
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Clinopyroxene Subgroup'-
'Garnet Group'-X3Z2(SiO4)3
'Jörgkellerite' (TL)-(Na,☐)3Mn3+3(PO4)2(CO3)(O,OH)2·5H2O
Melilite Group-Ca2M(XSiO7)
Natrocarbonatite-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Sulphur1.3.5.1S8
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 9:8
Pentlandite2.7.1.1(FexNiy)Σ9S8
AmXp, with m:p = 1:1
Alabandite2.8.1.4MnS
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Chlor-sulfides
Djerfisherite2.15.2.1K6(Fe,Cu,Ni)25S26Cl
Group 4 - SIMPLE OXIDES
A2X3
Perovskite4.3.3.1CaTiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Spinel7.2.1.1MgAl2O4
Group 9 - NORMAL HALIDES
AX
Halite9.1.1.1NaCl
Sylvite9.1.1.2KCl
Villiaumite9.1.1.3NaF
AX2
Fluorite9.2.1.1CaF2
Sellaite9.2.2.1MgF2
Group 11 - HALIDE COMPLEXES
AmBX3
Neighborite11.1.1.1NaMgF3
Group 13 - ACID CARBONATES
Miscellaneous
Kalicinite13.1.2.1KHCO3
Nahcolite13.1.1.1NaHCO3
Trona13.1.4.1Na3H(CO3)2 · 2H2O
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Gregoryite (TL)14.1.2.2(Na2,K2,Ca)CO3
Witherite14.1.3.2BaCO3
A2B(XO3)2
Nyerereite (TL)14.3.4.1Na2Ca(CO3)2
Miscellaneous
Shortite14.4.1.1Na2Ca2(CO3)3
Group 15 - HYDRATED NORMAL CARBONATES
A(XO3)·xH2O
Monohydrocalcite15.1.3.1CaCO3 · H2O
Thermonatrite15.1.1.1Na2CO3 · H2O
AmBn(XO3)p·xH2O, with (m+n):p > 1:1
Gaylussite15.2.2.1Na2Ca(CO3)2 · 5H2O
Pirssonite15.2.1.1Na2Ca(CO3)2 · 2H2O
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
A2XO4
Aphthitalite28.2.2.1(K,Na)3Na(SO4)2
'Thénardite'28.2.3.1Na2SO4
AXO4
Anhydrite28.3.2.1CaSO4
Baryte28.3.1.1BaSO4
Celestine28.3.1.2SrSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq, where m:p>2:1
Kogarkoite30.1.6.1Na3(SO4)F
Schairerite30.1.9.1Na21(SO4)7ClF6
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Monticellite51.3.2.1CaMgSiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Larnite51.5.1.1Ca2SiO4
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 55 - SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
Si2O7 Groups, Generally with No Additional Anions with cations in [8] and lower coordination
Alumoåkermanite (TL)55.4.1.5(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Cuspidine56.2.4.3Ca4(Si2O7)(F,OH)2
Lamprophyllite56.2.6c.4(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
Niocalite56.2.4.6(Ca,Nb)4(Si2O7)(O,OH,F)2
Tilleyite ?56.2.9.1Ca5(Si2O7)(CO3)2
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Combeite61.1.2a.5Na4.5Ca3.5Si6O17.5(OH)0.5
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Aegirine65.1.3c.2NaFe3+Si2O6
Aegirine-augite65.1.3b.2(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Diopside65.1.3a.1CaMgSi2O6
Single-Width Unbranched Chains, W=1 with chains P=3
Wollastonite65.2.1.1cCaSiO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Sanidine76.1.1.2K(AlSi3O8)
Al-Si Framework Feldspathoids and related species
Haüyne76.2.3.3(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
Nepheline76.2.1.2Na3K(Al4Si4O16)
Sodalite76.2.3.1Na8(Al6Si6O24)Cl2
Unclassified Minerals, Rocks, etc.
Andradite
var: Melanite
-Ca3Fe3+2(SiO4)3
'Apatite'-
'Clinopyroxene Subgroup'-
'Garnet Group'-X3Z2(SiO4)3
Jörgkellerite (TL)-(Na,☐)3Mn3+3(PO4)2(CO3)(O,OH)2·5H2O
Magnetite
var: Titaniferous Magnetite
-Fe2+(Fe3+,Ti)2O4
'Melilite Group'-Ca2M(XSiO7)
'Natrocarbonatite'-

List of minerals for each chemical element

HHydrogen
H CombeiteNa4.5Ca3.5Si6O17.5(OH)0.5
H GaylussiteNa2Ca(CO3)2 · 5H2O
H GypsumCaSO4 · 2H2O
H Jörgkellerite(Na,☐)3Mn33+(PO4)2(CO3)(O,OH)2·5H2O
H KaliciniteKHCO3
H Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
H MonohydrocalciteCaCO3 · H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H NahcoliteNaHCO3
H PhlogopiteKMg3(AlSi3O10)(OH)2
H PirssoniteNa2Ca(CO3)2 · 2H2O
H ThermonatriteNa2CO3 · H2O
H TronaNa3H(CO3)2 · 2H2O
CCarbon
C CalciteCaCO3
C GaylussiteNa2Ca(CO3)2 · 5H2O
C Gregoryite(Na2,K2,Ca)CO3
C Jörgkellerite(Na,☐)3Mn33+(PO4)2(CO3)(O,OH)2·5H2O
C KaliciniteKHCO3
C MonohydrocalciteCaCO3 · H2O
C NahcoliteNaHCO3
C NyerereiteNa2Ca(CO3)2
C PirssoniteNa2Ca(CO3)2 · 2H2O
C ShortiteNa2Ca2(CO3)3
C ThermonatriteNa2CO3 · H2O
C TilleyiteCa5(Si2O7)(CO3)2
C TronaNa3H(CO3)2 · 2H2O
C WitheriteBaCO3
OOxygen
O AegirineNaFe3+Si2O6
O Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
O Alumoåkermanite(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
O AndraditeCa3Fe23+(SiO4)3
O AnhydriteCaSO4
O Aphthitalite(K,Na)3Na(SO4)2
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O BaryteBaSO4
O CalciteCaCO3
O CelestineSrSO4
O CombeiteNa4.5Ca3.5Si6O17.5(OH)0.5
O CuspidineCa4(Si2O7)(F,OH)2
O DiopsideCaMgSi2O6
O FluorapatiteCa5(PO4)3F
O ForsteriteMg2SiO4
O Garnet GroupX3Z2(SiO4)3
O GaylussiteNa2Ca(CO3)2 · 5H2O
O Gregoryite(Na2,K2,Ca)CO3
O GypsumCaSO4 · 2H2O
O Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
O Jörgkellerite(Na,☐)3Mn33+(PO4)2(CO3)(O,OH)2·5H2O
O KaliciniteKHCO3
O KogarkoiteNa3(SO4)F
O Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
O LarniteCa2SiO4
O MagnetiteFe2+Fe23+O4
O Andradite (var: Melanite)Ca3Fe23+(SiO4)3
O Melilite GroupCa2M(XSiO7)
O MonohydrocalciteCaCO3 · H2O
O MonticelliteCaMgSiO4
O MuscoviteKAl2(AlSi3O10)(OH)2
O NahcoliteNaHCO3
O NephelineNa3K(Al4Si4O16)
O Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2
O NyerereiteNa2Ca(CO3)2
O PerovskiteCaTiO3
O PhlogopiteKMg3(AlSi3O10)(OH)2
O PirssoniteNa2Ca(CO3)2 · 2H2O
O QuartzSiO2
O SanidineK(AlSi3O8)
O SchaireriteNa21(SO4)7ClF6
O ShortiteNa2Ca2(CO3)3
O SodaliteNa8(Al6Si6O24)Cl2
O SpinelMgAl2O4
O ThénarditeNa2SO4
O ThermonatriteNa2CO3 · H2O
O TilleyiteCa5(Si2O7)(CO3)2
O Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
O TitaniteCaTi(SiO4)O
O TronaNa3H(CO3)2 · 2H2O
O WitheriteBaCO3
O WollastoniteCaSiO3
FFluorine
F CuspidineCa4(Si2O7)(F,OH)2
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
F KogarkoiteNa3(SO4)F
F Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
F NeighboriteNaMgF3
F Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2
F SchaireriteNa21(SO4)7ClF6
F SellaiteMgF2
F VilliaumiteNaF
NaSodium
Na AegirineNaFe3+Si2O6
Na Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Na Alumoåkermanite(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
Na Aphthitalite(K,Na)3Na(SO4)2
Na CombeiteNa4.5Ca3.5Si6O17.5(OH)0.5
Na GaylussiteNa2Ca(CO3)2 · 5H2O
Na Gregoryite(Na2,K2,Ca)CO3
Na HaliteNaCl
Na Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
Na Jörgkellerite(Na,☐)3Mn33+(PO4)2(CO3)(O,OH)2·5H2O
Na KogarkoiteNa3(SO4)F
Na Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
Na NahcoliteNaHCO3
Na NeighboriteNaMgF3
Na NephelineNa3K(Al4Si4O16)
Na NyerereiteNa2Ca(CO3)2
Na PirssoniteNa2Ca(CO3)2 · 2H2O
Na SchaireriteNa21(SO4)7ClF6
Na ShortiteNa2Ca2(CO3)3
Na SodaliteNa8(Al6Si6O24)Cl2
Na ThénarditeNa2SO4
Na ThermonatriteNa2CO3 · H2O
Na TronaNa3H(CO3)2 · 2H2O
Na VilliaumiteNaF
MgMagnesium
Mg Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mg Alumoåkermanite(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg DiopsideCaMgSi2O6
Mg ForsteriteMg2SiO4
Mg MonticelliteCaMgSiO4
Mg NeighboriteNaMgF3
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg SellaiteMgF2
Mg SpinelMgAl2O4
AlAluminium
Al Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Al Alumoåkermanite(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
Al Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al NephelineNa3K(Al4Si4O16)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al SanidineK(AlSi3O8)
Al SodaliteNa8(Al6Si6O24)Cl2
Al SpinelMgAl2O4
SiSilicon
Si AegirineNaFe3+Si2O6
Si Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Si Alumoåkermanite(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
Si AndraditeCa3Fe23+(SiO4)3
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si CombeiteNa4.5Ca3.5Si6O17.5(OH)0.5
Si CuspidineCa4(Si2O7)(F,OH)2
Si DiopsideCaMgSi2O6
Si ForsteriteMg2SiO4
Si Garnet GroupX3Z2(SiO4)3
Si Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
Si Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
Si LarniteCa2SiO4
Si Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Si Melilite GroupCa2M(XSiO7)
Si MonticelliteCaMgSiO4
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si NephelineNa3K(Al4Si4O16)
Si Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si QuartzSiO2
Si SanidineK(AlSi3O8)
Si SodaliteNa8(Al6Si6O24)Cl2
Si TilleyiteCa5(Si2O7)(CO3)2
Si TitaniteCaTi(SiO4)O
Si WollastoniteCaSiO3
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Jörgkellerite(Na,☐)3Mn33+(PO4)2(CO3)(O,OH)2·5H2O
SSulfur
S AlabanditeMnS
S AnhydriteCaSO4
S Aphthitalite(K,Na)3Na(SO4)2
S BaryteBaSO4
S CelestineSrSO4
S ChalcopyriteCuFeS2
S DjerfisheriteK6(Fe,Cu,Ni)25S26Cl
S GalenaPbS
S GypsumCaSO4 · 2H2O
S Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
S KogarkoiteNa3(SO4)F
S Pentlandite(FexNiy)Σ9S8
S PyrrhotiteFe7S8
S SchaireriteNa21(SO4)7ClF6
S SphaleriteZnS
S SulphurS8
S ThénarditeNa2SO4
ClChlorine
Cl DjerfisheriteK6(Fe,Cu,Ni)25S26Cl
Cl HaliteNaCl
Cl Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
Cl SchaireriteNa21(SO4)7ClF6
Cl SodaliteNa8(Al6Si6O24)Cl2
Cl SylviteKCl
KPotassium
K Aphthitalite(K,Na)3Na(SO4)2
K DjerfisheriteK6(Fe,Cu,Ni)25S26Cl
K Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
K KaliciniteKHCO3
K MuscoviteKAl2(AlSi3O10)(OH)2
K NephelineNa3K(Al4Si4O16)
K PhlogopiteKMg3(AlSi3O10)(OH)2
K SanidineK(AlSi3O8)
K SylviteKCl
CaCalcium
Ca Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Ca Alumoåkermanite(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
Ca AndraditeCa3Fe23+(SiO4)3
Ca AnhydriteCaSO4
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca CalciteCaCO3
Ca CombeiteNa4.5Ca3.5Si6O17.5(OH)0.5
Ca CuspidineCa4(Si2O7)(F,OH)2
Ca DiopsideCaMgSi2O6
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
Ca GaylussiteNa2Ca(CO3)2 · 5H2O
Ca GypsumCaSO4 · 2H2O
Ca Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
Ca LarniteCa2SiO4
Ca Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Ca Melilite GroupCa2M(XSiO7)
Ca MonohydrocalciteCaCO3 · H2O
Ca MonticelliteCaMgSiO4
Ca Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2
Ca NyerereiteNa2Ca(CO3)2
Ca PerovskiteCaTiO3
Ca PirssoniteNa2Ca(CO3)2 · 2H2O
Ca ShortiteNa2Ca2(CO3)3
Ca TilleyiteCa5(Si2O7)(CO3)2
Ca TitaniteCaTi(SiO4)O
Ca WollastoniteCaSiO3
TiTitanium
Ti Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
Ti PerovskiteCaTiO3
Ti Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn AlabanditeMnS
Mn Jörgkellerite(Na,☐)3Mn33+(PO4)2(CO3)(O,OH)2·5H2O
Mn Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
FeIron
Fe AegirineNaFe3+Si2O6
Fe Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Fe Alumoåkermanite(Ca,Na)2(Al,Mg,Fe2+)(Si2O7)
Fe AndraditeCa3Fe23+(SiO4)3
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe ChalcopyriteCuFeS2
Fe DjerfisheriteK6(Fe,Cu,Ni)25S26Cl
Fe Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
Fe MagnetiteFe2+Fe23+O4
Fe Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Fe Pentlandite(FexNiy)Σ9S8
Fe PyrrhotiteFe7S8
Fe Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
NiNickel
Ni DjerfisheriteK6(Fe,Cu,Ni)25S26Cl
Ni Pentlandite(FexNiy)Σ9S8
CuCopper
Cu ChalcopyriteCuFeS2
Cu DjerfisheriteK6(Fe,Cu,Ni)25S26Cl
ZnZinc
Zn SphaleriteZnS
SrStrontium
Sr CelestineSrSO4
Sr Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
NbNiobium
Nb Niocalite(Ca,Nb)4(Si2O7)(O,OH,F)2
BaBarium
Ba BaryteBaSO4
Ba WitheriteBaCO3
PbLead
Pb GalenaPbS

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Holocene - Pleistocene
0 - 2.588 Ma



ID: 2697392
Main-cone volcaniclastic rocks and lava flows

Age: Pleistocene (0 - 2.588 Ma)

Description: Stippled on northwest flank where pyroclastic flow(?) deposits of 2007–08 can be delineated from oblique photography. Less well-defined lava flows are contained within this unit. Lava flows: chiefly nephelinite and phonolite, but includes recent carbonatite on west flank. Subdivided into: Holocene carbonatite lava flows, Pleistocene nephelinite of upper flanks, and Pleistocene phonolite lava flow on lower east-southeast flank. Carbonatite lava flows: Pāhoehoe and ‘a‘ā of 2006 eruption. Nephelinite of upper flanks: remnants of lava flow, highest part of which is sometimes called “Pearly Gates” for the slot traversed through it by westside climbers’ trail

Lithology: Nephelenite and phonolite volcanic rocks

Reference: Sherrod, D.R., Magigita, M.M., and Kwelwa, S. Geologic map of Oldonyo Lengai (Oldoinyo Lengai) and surroundings, Arusha Region, United Republic of Tanzania. doi: 10.3133/ofr20131306. U.S. Geological Survey Open-File Report 2013-1306. [126]

Quaternary
0 - 2.588 Ma



ID: 3306518

Age: Pleistocene (0 - 2.588 Ma)

Lithology: Volcanic

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

Neogene
2.588 - 23.03 Ma



ID: 3186107
Cenozoic volcanic rocks

Age: Neogene (2.588 - 23.03 Ma)

Lithology: Intermediate volcanic rocks; phonolite

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Guest, N.J. (1956) The volcanic activity of Oldoinyo L'Engai, 1954. Rec. Geol. Surv. Tanganyika: 4: 56-59
Dawson, J.B. (1962) Sodium carbonatite lavas from Oldoinyo Lengai, Tanganyika. Nature: 195: 1075-1076
Milton, C. (1968) The "natro-carbonatite lava" of Oldoinyo Lengai, Tanzania. Geological Society of America Special Paper 121: 202 (abstract)
Peterson, T.D. (1986) Sodium metasomatism and mineral stabilities in alkaline ultramafic rocks: implications for the origin of the sodic lavas of Oldoinyo Lengai. Eos: 67: 617 (abstract)
Peterson, T.D. (1989) Peralkaline nephelinites II. Low pressure fractionation and the hypersodic lavas of Oldoinyo Lengai. Contributions to Mineralogy and Petrology: 102: 336-346
Peterson, T.D. (1990) Petrology and genesis of natrocarbonatite. Contributions to Mineralogy and Petrology: 105: 143-155
Mitchell, R.H. (1997) Carbonate-carbonate immiscibility, neighborite and potassium iron sulphide in Oldoinyo Lengai natrocarbonatite. Mineralogical Magazine: 61: 779-789
Dawson, J.B. and Hll, P.G. (1998) Mineral chemistry of peralkaline combeite-lamprophyllite nephelinite from Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 62: 179-196
Pettibon, C.M., Kjarsgaard, B.A., Jenner, G.A., and Jackson, S.E. (1998) Phase relationships of a silicate-bearing natrocarbonatite from Oldoinyo Lengai at 20 and 1000 MPa. Journal of Petrology: 39: 2137-2151
Jago, B. C., & Gittins, J. (1999). Mn-and F-bearing rasvumite in natrocarbonatite at Oldoinyo Lengai volcano, Tanzania. Mineralogical Magazine, 63(1), 53-55.
Genge MJ, Balme B, Jones AP (2001): Salt-bearing fumarole deposits in the summit crater of Oldoinyo Lengai, Northern Tanzania: Interactions between natrocarbonate lava and meteoric water. J. Volcanology 106, 111-122.
Mitchell, R.H. and Belton, F. (2004) Niocalite-cuspidine solid solution and manganoan monticellite from natrocarbonatite, Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 68: 787-799
Mitchell, R.H. (2006) Mineralogy of stalactites formed by subaerial weathering of natrocarbonatite hornitos at Oldoinyo Lengai, Tanzania. Mineralogical Magazine: 70: 437-444
Keller, J., & Zaitsev, A. N. (2006). Calciocarbonatite dykes at Oldoinyo Lengai, Tanzania: the fate of natrocarbonatite. The Canadian Mineralogist, 44(4), 857-876.
Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.
Dawson, B. (2008): A volcanic voyage of discovery. Elements, 4, 138-139
Anatoly N. Zaitsev, A.N., Zaitseva, O.A., Buyko, A.K., Keller, J., Klaudius, J. and Zolotarev. (2009). Gem-quality yellow-green hauyne from Oldoinyo Lengai volcano, Nothern Tanzania. Gems & Gemology, 45(3), 200-203.
Mattsson, H. B., & Reusser, E. (2010). Mineralogical and geochemical characterization of ashes from an early phase of the explosive September 2007 eruption of Oldoinyo Lengai (Tanzania). Journal of African Earth Sciences, 58(5), 752-763.
Bosshard-Stadlin, S. A., Mattsson, H. B., & Keller, J. (2014). Magma mixing and forced exsolution of CO 2 during the explosive 2007–2008 eruption of Oldoinyo Lengai (Tanzania). Journal of Volcanology and Geothermal Research, 285, 229-246.
Zaitsev, A.N., Britvin, S.N., Kearsley, A., Wenzel, T., Kirk, C. (2017): Jörgkellerite, Na3Mn3+3(PO4)2(CO3)O2·5H2O, a new layered phosphate-carbonate mineral from the Oldoinyo Lengai volcano, Gregory rift, northern Tanzania. Mineralogy and Petrology 111, 373–381.

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