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Ambatonapetraka pegmatites (Miandrarivo pegmatites), Sahatany Valley, Sahatany Pegmatite Field (Mt Ibity area), Vakinankaratra Region, Antananarivo Province, Madagascar

Latitude: 19°58'43"S
Longitude: 46°57'4"E

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The locality-name Ambatonapetraka refers in the literature to a small numbers of pegmatite dikes of complex type (LCT) that has been worked for gem tourmaline situated N of the village Ambatonapetraka. These dikes are located in the northern part of the Sahatany Pegmatite Field.
This is the same locality that Lacroix (1922) refers to as the Miandrarivo pegmatites (and also as Antsofimbato), and by Guigues (1954) as Antsofimbato IV. It is located about 500 NV of the Antsofimbato pegmatites (see that entry in MinDat)
The pegmatite dikes is hosted in an altered sillimanite-garnet mica schsist
Rakotoarison (1964) locality nr 1.

Mineral List

24 entries listed. 21 valid minerals.

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References

Guigues, J. (1954): Étude des gisements de pegmatites de Madagascar (première partie). Service Geologique Tananarive. Travaux du Bureau Géologique 82. 119p. [p 85]

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

Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de Doctorat de l`Universite Paul Sabatier, Toulouse

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Copyright © Jolyon Ralph and Ida Chau 1993-2013. 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. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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