In-situ determination of major and trace elements in calcite and apatite, and U–Pb ages of apatite from the Oka carbonatite complex: Insights into a complex crystallization history

This study reports in-situ determination of major and trace element compositions of calcite and apatite, and U–Pb ages of apatite for carbonatites and associated okaites and ijolites from the Oka carbonatite complex (Canada). Both apatite and calcite are rare earth element (REE)-enriched (total REEs > 4 wt.%), with REE and SiO2 contents that correlate positively in apatite. This result supports the previously proposed substitution scheme of...