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Ambatofotsy pegmatite, Mahavelona Commune, Soavinandriana District, Itasy Region, Antananarivo Province, Madagascar

Betafite (of Hogarth 1977)
Ambatofotsy pegmatite, Mahavelona Commune, Soavinandriana District, Itasy Region, Antananarivo Province, Madagascar

Photo: Arliguie M
Ambatofotsy, Kaominina Mahavelona, Distrikan' i Soavinandriana, Faritra Itasy, Faritanin' Antananarivo, Madagasikara

A granite LCT pegmatite, subtype Beryll-Columbite-Uranium that is famous for producing very large Betafites. One of the largest crystal group weighted 104 kg!
It is located 22 km WSW of the town Soavinandriana in the central highland of Madagascar.

Mineral List

Aeschynite-(Y)
Albite
var: Oligoclase
Anatase
Beryl
Biotite
Bismuthinite
Bismutite
Fergusonite-(Y)
Microcline
'Perthite'
Pyrochlore Supergroup
var: Betafite (of Hogarth 1977)

Quartz
var: Amethyst
var: Smoky Quartz
Rutile
Thorite
var: Orangite
Titanite
Vermiculite
Zircon
var: Malacon



21 entries listed. 13 valid minerals.

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References

- Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A. Challamel (Éditeur), Paris. pp. 379-381.
- Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
- Besairie H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive, 34, 92p

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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