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Marijao pegmatite, Ankazobe District, Ankazobe Pegmatite Field, Analamanga Region, Antananarivo Province, Madagascar

(Marijao, Distrikan' i Ankazobe, Pegmatitan' i Ankazobe, Faritra Analamanga, Faritra Analamanga, Faritanin'i Antananarivo, Madagasikara)

A LCT pegmatite prospected by the Commisariat á l 'Énergie in the 1950s, situated about 55 km NNE of the town Ankazobe, N of the capitol, Antananarivo.
Large beryl crystals of beryl up to 100 kg were found here in 1971.



References:
- Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
- Petsch, E. J. and Schmetzer, K. (2002): Das Aquamarinvorkommen von Marijao in Madagaskar: einer der grössten jemals bekannt gewordenen Aquamarinfunde. in "Aquamarin & Co". ExtraLapis No. 23: 56-61 [German version]





Mineral List:
  • 'Allanite'
    Reference: [Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871]
  • Beryl
    Be
     
    3
    Al
     
    2
    Si
     
    6
    O
     
    18
    Reference: [Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871]
    Site Photo
    Marijao pegmatite, Ankazobe District, Ankazobe Pegmatite Field, Analamanga Region, Antananarivo Province, Madagascar
    © ARLIGUIE M
  • Beryl
    var: Aquamarine
    Be
     
    3
    Al
     
    2
    Si
     
    6
    O
     
    18
    Reference: [ExtraLapis No. 23: 56-61 [German version]
  • 'Columbite-Tantalite'
    Reference: [Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871]
  • Euxenite-(Y)
    (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)
     
    2
    O
     
    6
    Reference: [Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871]
  • 'Fergusonite'
    Reference: [Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871]
  • Microcline
    var: Amazonite
    Reference: [Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871]
  • Samarskite-(Y)
    (Y,Fe
    3+
     
    ,Fe
    2+
     
    ,U,Th,Ca)
     
    2
    (Nb,Ta)
     
    2
    O
     
    8
    Reference: [Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p 14]


    8 entries listed. 3 valid minerals.

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