Sakenite lenses within a series of biotite-sillimanite-cordierite-garnet gneisses of the Ihosy granulite unit in the NW part of the Bongolava-Ranotsara shear zone. The sakenite was first described by A.Lacroix in 1939 in rocks exposed along the beds of the Sakena River NW of the town Ihosy. Samples of this unique rock was collected by Besaire and brought to Alfred Lacroix already in 1928 and given the preliminary description "paragneiss á anorthite" by A. Lacroix (1929). Sakenite is defined as corundum-spinel-sapphirine-anorthite rocks (Raith et al 2008).
References
- Lacroix, A. (1929): Sur un schiste cristallin á saphirine de Madagascar et sur les roches á saphirine en géneral. Bulletin de la Société française de minéralogie et de cristallographie
52:72-84
- Lacroix, A. (1939): Sur un nouveau type de roche métamorphique (sakenite) faisant partie des schistes cristallins du sud de Madagascar. Comptes Rendus d'Academie des Sciences, 209 (17):609-612
- Lacroix, A. (1941): Les gisement de phlogopite de Madagascar et les pyroxenites qui les renferment (Extrait du fasicule XI des Annales Géologiques du Service des Mines), Tananarive, Imprimerie Officielle, 119p
- Raith, M.M. ; Rakotondrazafy, R. & Sengupta, P. (2008): Petrology of corundum-spinel-sapphirine-anorthite rocks (sakenites) from the type locality in southern Madagascar. J. metamorphic Geol.,26: 647-667
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