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Befanamo pegmatite, Anjozorobe District, Ankazobe Pegmatite Field, Analamanga Region, Antananarivo Province, Madagascar

Befanamite
Befanamo pegmatite, Anjozorobe District, Ankazobe Pegmatite Field, Analamanga Region, Antananarivo Province, Madagascar

Photo: Arliguie M

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Befanamo, Distrikan'i Anjozorobe, Pegmatitan' i Ankazobe, Faritra Analamanga, Faritanin' Antananarivo, Madagasikara

A granite NYF pegmatite, Monazite-Thortveitite subtype that is hosted in an amphibolite-gneis. This scandium-rich pegmatite has produced more than 40 kg of "befanamite" (Y-Free variety of thortveitite) since its discovery in 1908 (especially in the early 1950s). It is situated 2 km W of the village Ambalabako, about 20 NE of Ambatomanoina, and about 80 km N of the capitol Antananarivo.
"Befanamite" was first described from this locality. It was discovered in the eluvials of the pegmatite in 1918 by J. B. Rasamoel.

Mineral List

26 entries listed. 17 valid minerals.

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References

Guigues, J. (1955): Etude des gisements de pegmatite de Madagascar (Deuxième partie). Travaux du Bureau Géologiques de Madagascar 67, Service Geologique, Tananarive, p 6-8

Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, 19-20 [on befanamite]

Pezzotta, F. (1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. ExtraLapis nr 17, 44-46 [german version, a short notice]

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