Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Antanetinilapa (Estatoby), Sahatany Valley, Sahatany Pegmatite Field (Mt Bity (Ibity) area), Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar

StandardDetailedBy ChemistryMineral Photos (9)Site Photos (1)MapsSearch Google

Antanetinilapa pegmatite/quarry is situated on a small hill behind the village Antanetinilapa east of Mt.Ilapa, south of a small affluent to the Sahatany river on the western side of the Sahatany river in the NE part of the Sahatany Valley. The local population calls the very quarry today "Estatoby" , but the name known in literature is Antanetinilapa. (Malagasy place names often changes)
Minerals, especially bityite (found here at the end of 1980s), are often mislabeled as coming from the Ilapa quarry. This is an entire other locality nearby, but totally different from Antanetinilapa. So far bityite has not been reported from Ilapa. Some recent literature also wrongly spells the name of this locality as "Antanety ny Ilapa" probably cause to a misunderstanding of the malagasy language.

Rakotoarison (1964) locality nr 15.



References:
- Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A. 1983, 1-39.

- Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, nr 19, 15-28





 Map Reference: 20°3'26"S , 46°57'16"E

This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.



Mineral List:
  		•  Albite
    Na[AlSi
     
    3
    		O
     
    8
    		]
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, 19, 15-28]
  		•  Allanite-(Ce)
    {CaCe}{Al
     
    2
    		Fe
    2+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    Reference: [Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Bergverksmuseets skrifter 25, 5-18 (in norwegian)]
    Site Photo
    Antanetinilapa (Estatoby), Sahatany Valley, Sahatany Pegmatite Field (Mt Bity (Ibity) area), Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar
    © K.E.Larsen
  		•  Amesite
    Mg
     
    2
    		Al[(OH)
     
    4
    		|AlSiO
     
    5
    		]
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, nr 19, 15-28]
  		•  'Apatite'
    Reference: [Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Bergverksmuseets skrifter 25, 5-18 (in norwegian); Lefevre, M. & Thomas, L. (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. Le Règne Minéral no 19, 15-28 ]
  		•  Axinite-(Mn)
    Ca
     
    2
    		Mn
    2+
     
    		Al
     
    2
    		[OH|BSi
     
    4
    		O
     
    15
    		]
    Description: Knut Edvard Larsen collection, identified by XRD at MGM, Oslo 1998.
    Reference: [ Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Bergverksmuseets skrifter 25, 5-18 (in norwegian) ]
  		•  Beryl
    Be
     
    3
    		Al
     
    2
    		Si
     
    6
    		O
     
    18
    Colour: green
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, nr 19, 15-28]
  		•  Bityite
    CaLiAl
     
    2
    		[(OH)
     
    2
    		|BeAlSi
     
    2
    		O
     
    10
    		]
    Habit: pseudohexagonal barrelshaped polysyntetic twin crystals (to 5mm long)
    Colour: colorless, sometimes with a tint of pale yellow
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, nr 19, 15-28]
    Site Photo
    Antanetinilapa (Estatoby), Sahatany Valley, Sahatany Pegmatite Field (Mt Bity (Ibity) area), Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar
    © Knut Eldjarn
  		•  Chevkinite-(Ce)
    (Ce,La,Ca,Th)
     
    4
    		(Fe
    2+
     
    		,Mg)(Fe
    2+
     
    		,Ti,Fe
    3+
     
    		)
     
    2
    		(Ti,Fe
    3+
     
    		)
     
    2
    		[O
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
     
    2
    Description: Samples labelled "chevkinite-(Ce) has been showed to be allanite-(Ce). See Larsen (2003)
    Reference: [Lefevre, M. & Thomas, L. (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. Le Règne Minéral no 19, 15-28 ]
    Site Photo
    Antanetinilapa (Estatoby), Sahatany Valley, Sahatany Pegmatite Field (Mt Bity (Ibity) area), Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar
    © luigi chiappino
  		•  Columbite-(Fe)
    FeNb
     
    2
    		O
     
    6
    Reference: [Knut Edvard Larsen collection, Identified at MGM, Oslo 1998 (XRD)]
  		•  Columbite-(Mn)
    (Mn,Fe)(Nb,Ta)
     
    2
    		O
     
    6
    Reference: [K.E.Larsen collection]
  		•  Danburite
    CaB
     
    2
    		Si
     
    2
    		O
     
    8
    Habit: small mm-sized pseudocubic xls & as ortorhombic prismatic xls
    Colour: white, colorless,yellow
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, nr 19, 15-28]
  		•  Elbaite
    [Na][(Li,Al)
     
    3
    		][Al
     
    6
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, 19, 15-28]
  		•  Lepidolite
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, nr 19, 15-28]
  		•  Microcline
    K[AlSi
     
    3
    		O
     
    8
    		]
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, 19, 15-28]
  		•  Microcline
    var: Amazonite
    Reference: [Rakotoarison, W: Les pegmatites de la Sahatany, Madagascar. Archive du Service Geologique Madagascar A.1983. 1-39]
  		•  'Monazite'
    Reference: [Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Bergverksmuseets skrifter 25, 5-18 (in norwegian)]
  		•  Phenakite
    Be
     
    2
    		[SiO
     
    4
    		]
    Reference: [Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Bergverksmuseets skrifter 25, 5-18 (in norwegian)]
  		•  'Pyrochlore Group'
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, p. 19, 15-28]
  		•  Quartz
    SiO
     
    2
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, 19, 15-28]
  		•  Schorl
    [Na][Fe
    2+
    3
    		][Al
     
    6
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, nr 19, 15-28]
  		•  Spessartine
    Mn
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [Rakotoarison, W: Les pegmatites de la Sahatany, Madagascar. Archive du Service Geologique Madagascar A. 1983. 1-39]
  		•  Spodumene
    LiAl[Si
     
    2
    		O
     
    6
    		]
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, 19, 15-28]
  		•  'Tourmaline'
    AD
     
    3
    		G
     
    6
    		(BO
     
    3
    		)
     
    3
    		[T
     
    6
    		O
     
    18
    		]Y
     
    3
    		Z
    Reference: [Rakotoarison, W: Les pegmatites de la Sahatany, Madagascar. Archive du Service Geologique Madagascar A.1983. 1-39]
  		•  Zoisite
    {Ca
     
    2
    		}{Al
     
    3
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    Reference: [Lefevre & Thomas (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. La Règne Minéral, 19, 15-28]


    24 entries listed. 17 valid minerals. 1 erroneous literature entry.

    The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
    This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 28th Nov 2009 22:03:30