One of the most famous of the more than 100 pegmatites in the Sahatany Pegmatite Field. It is situated in a ravine about 2 km W of the village Ihasy in the Sahatany Valley, about 25 km SW of the town Antsirabe. It is sometimes labeled as "Manjaka, Mt. Ibity". Mt. Ibity or the Ibity Massif is forming the eastern border of the Sahatany Pegmatite Field. Duparc et al (1911) and A. Lacroix (1911) erroneously called the locality "Ampakita" (Bulletin de la Société francaise de Minéralogie, 34, 131-139). The locals now refer to the site as "Sahananana". A complex LCT pegmatite is hosted in a marble and has been worked for gem tourmaline since the beginning of the 20th century. The pegmatite body is now exhausted. A large number of minerals has been found, mostly in the many miarolitic cavities in the pegmatite.
References:
- Duparc, L., Wunder, M. & Sabot , R. (1911): Contribution á la connaissance des minéraux de Madagascar. 2e note. Bulletin de la Société française de Minéralogie, Paris 34, 131-134. (on rhodizite p. 136-138]
- Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris 35 , 76-84
- Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A. Challamel (Éditeur), Paris. 624p
- Behier, J (1953): Les mineraux de la pegmatite de Manjaka, Vallee de la Sahatany. Archive Service Gélogique Madagascar. A.581
- Behier, J. (1960): Travaux mineralogiques. Rapport Annuel 1960 Service Géologiques, Rep. Malgache., Tananarive. 186-187 [Abstract in American Mineralogist 46 (1961), 767-8]
- Mrose, M.E. & Rose jr, J. (1961): Behierite, (Ta, Nb)BO4, a new mineral from Manjaka, Madagascar. Geol. Soc. Am, Abstracts 1961 Ann. Meetings, p 111A. [abstract in American Mineralogist 47 (1962), 414]
- Behier, J. (1962): Travaux mineralogiques. Rapport Annuel 1962 Service Géologiques, Rep. Malgache., Tananarive. p 257
- Frondel, C. & Ito, J. (1965): Composition of Rhodizite. Tschermaks mineralogische und petrographische Mitteilungen 10, (1-4):409-412 [Chemical analysis of rhodizite from Manjaka]
- Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de doctorat de L'Universite Paul Sabatier, Toulouse
- Ertl, A. & Tillmanns, E. (2008): Al- and B-rich tourmaline from the Sahatany Pegmatite Field, Madagascar and its relevance on a new barometer. Goldschmidt 2008 Conferance Abstract A 247
24 entries listed. 20 valid minerals. 1 erroneous literature entry.
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