SpessartineTsilaizina pegmatite, Sahatany Valley, Sahatany Pegmatite Field, Vakinankaratra Region, Antananarivo Province, Madagascar
Photo: 2003 John H. Betts A complex type LCT pegmatite, known for large tabular crystals of pink beryl, a yellow Mn-rich variety of tourmaline called "tsilaisite". It is situated south of the quartzite Ibity Massif (Mt. Ibity), on the northern side of Mt. Tsilaizina, in the Sahatany Pegmatite Field south of the town Antsirabe in the main highland of Madagascar. The pegmatite is hosted by Proterozoic metapelites
Note: Minerals originating from
Antandrokomby (especially rhodizite and small crystals of pigeonblood-red elbaite-schorl etc) have been sold at markets in
Sahanivotry and
Antsirabe as coming (erronously) from Tsiliazina.
Mineral List
29 entries listed. 21 valid minerals.
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References
- Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A.Challamel (Éditeur), Paris. 624p
- Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de Doctorat de l`Universite Paul Sabatier, Toulouse
- Simmons, W.B., Falster A.U. & Laurs, B.M. (2011): A survey of Mn-rich yellow tourmaline from worldwide localities and implications for the petrogenesis of granitic pegmatites. Canadian Mineralogist. 49: 301-319 [with analysis of a yellow elbaite from Tsiliazina]
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