Selected thin section micro-photographs illustrating the studied apatite crystals. A) Optical image showing apatite associated to primary ilmenite; B) BSE image showing apatite associated to primary ilmenite; C-D) cathodoluminiscence micro-photographs of the studied apatite crystals, E-F) Thin section micro-photographs showing apatite related to primary clinopyroxene. The apatite appears as acicular crystals (Ap) associated to the primary plagioclases, clinopyroxene (Cpx) and ilmenite (Ilm).