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Tomboarivo pegmatite, Sahanivotry Commune, Antsirabé 2 District, Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar

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(Tomboarivo, Kaominina Sahanivotry Manandona, Distrikan' i Antsirabe II, Faritra Vakinankaratra, Faritany Antananarivo, Madagasikara)

A pegmatite worked for betafite situated about 2-3 km west of the small town Sahanivotry in the Manandona valley about 30 km south of the city Antsirabe in the central highland of Madagascar.



References:
- Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p.71 + 390





Mineral List:
  		•  Aeschynite-(Y)
    (Y,Ca,Fe,Th)(Ti,Nb)
     
    2
    		(O,OH)
     
    6
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
    Site Photo
    Tomboarivo pegmatite, Sahanivotry Commune, Antsirabé 2 District, Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar
    © ARLIGUIE M
  		•  'Allanite'
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p.71]
  		•  Anatase
    TiO
     
    2
    Description: Variety xanthitane. As microscopic crystals in pseudomorphs after titanite
    Reference: [Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p 15]
  		•  Beryl
    Be
     
    3
    		Al
     
    2
    		Si
     
    6
    		O
     
    18
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Betafite
    (Ca,U)
     
    2
    		(Ti,Nb)
     
    2
    		O
     
    6
    		(OH)
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
    Site Photo
    Tomboarivo pegmatite, Sahanivotry Commune, Antsirabé 2 District, Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar
    © Arliguie M
  		•  Bismutite
    (BiO)
     
    2
    		CO
     
    3
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  'Fergusonite'
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Hematite
    Fe
     
    2
    		O
     
    3
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Microcline
    K[AlSi
     
    3
    		O
     
    8
    		]
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Microcline
    var: Amazonite
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  'Monazite'
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Quartz
    SiO
     
    2
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Rutile
    TiO
     
    2
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Rutile
    var: Ilmenorutile
    Fe
     
    x
    		(Nb,Ta)
     
    2x
    		·4Ti
     
    1-x
    		O
     
    2
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Thorite
    (Th,U)[SiO
     
    4
    		]
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Thorite
    var: Orangite
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Titanite
    CaTi[O|SiO
     
    4
    		]
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  'Tourmaline'
    AD
     
    3
    		G
     
    6
    		(BO
     
    3
    		)
     
    3
    		[T
     
    6
    		O
     
    18
    		]Y
     
    3
    		Z
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Vermiculite
    (Mg,Fe,Al)
     
    3
    		(Al,Si)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]
  		•  Zircon
    Zr[SiO
     
    4
    		]
    Reference: [Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 71]


    21 entries listed. 14 valid minerals.

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