First occurrence of zirconolite in the South Bahia Alkaline Province: syenite intrusion of Floresta Azul Alkali Complex, Bahia, NE Brazil
DOI:
https://doi.org/10.14808/sci.plena.2015.095301Keywords:
Mineralogy, Zirconolite, Bahia StateAbstract
Zirconolite crystals (CaZrTi2O7) anhedral, subhedral and sizes less than 20 μm were first identified in the South Bahia Alkaline Province from syenites the Floresta Azul Alkaline Complex. In this study we used a scanning electron microscope with secondary electron detectors, backscattered electrons and energy dispersive spectrometer. The zirconolite is included in antiperthite oligoclase and perthite microcline, usually being in association with baddeleyite, zircon, monazite, ilmenite and pyrite. The chemical data for zirconolite crystals studied revealed that they are homogeneous and their compositions are similar to those described in the literature for the zirconolita from foid syenites and carbonatites.
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