The locality designed by "Ilapa" consists of several workings around Mt. Ilapa in the NE part of the Sahatany Valley, about 25 km SW of the town Antsirabe. The pegmatites has been worked for gem polychromatic tourmalines and are hosted in a dolomitique marble.
Rakotoarison (1964) describes 3 workings along a 60m long pegmatite at the NNW flanc of Mt. Ilapa, and another one about 350 m further NE.
Minerals, especially pieces of bityite found in the late 1980s originating from the Antanetinilapa quarry in the same area are sometimes wrongly labelled as coming from Ilapa.
Rakotoarison(1964) locality nr 14.
References:
- Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, 39 p
- Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de Doctorat de l`Universite Paul Sabatier, Toulouse.
Mineral List:26 entries listed. 20 valid minerals.
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