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Soamiakatra, Antsirabé 2 District, Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar

Corundum-bearing clinopyroxenite xenoliths in Cenozoic alkali basalts intruding graphitic gneisses and migmatites.



References:
- Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Oxygen isotope systematics of gem corundum deposits in Madagascar: relevance for their geological origin. Mineralium Deposita 42, 251-270.

- Rakotondrazafy, A.F.M., Giuliani, G., Ohnenstetter, D., Fallick, A.E., Rakotosamizanany, S., Andriamamonjy, A., Ralantoarison, T., Razanatseheno, M., Offant, Y., Garnier, V., Maluski, H., Dunaigre, C., Schwarz, D., and Ratrimo, V. (2008): Gem corundum deposits of Madagascar: A review. Ore Geology Reviews 34, 134-154.





Map Reference: 19°55'S , 47°7'E

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Mineral List:
Albite
'Almandine-Pyrope Series'
Anorthite
var: Bytownite

var: Labradorite
Corundum
var: Ruby

Ilmenite
Phlogopite
Rutile
'Scapolite'
Spinel
var: Chromspinel

Zircon


11 entries listed. 5 valid minerals.

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