| | Journal (article/letter/editorial) | Agostinho Neto, Av. 4 de Fevereiro 7, 815 Luanda, Angola Earth and Ocean Sciences, School of Natural Sciences...of pyrochlores during magmatic evolution: the Tchivira carbonatites occur in a plutonic complex, the...Catanda carbonatites are volcanic in origin. In Tchivira pyrochlore, zoning is poorly developed; fluorine...contents are lower than those in the pyrochlores from Tchivira; and as substitution of Na at the A site increases...exsolution in the volcanic carbonatites. K EY WORDS : Angola, carbonatite, zonation in pyrochlore, fluorine, |
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