In-situ Determination of Trace Element and REE Partitioning in a Natural Apatite-Carbonatite Melt System using Synchrotron XRF Microprobe Analysis

摘要

Inclusions of calcite within large euhedral apatite crystals from the pyroxenite-carbonatite-syenite complex of Sevattur, Tamil Nadu, south India, were identified to represent inclusions of a primary carbonatitic melt (calcite I) from which the apatites have crystallized. The apatites themselves are embedded into a younger batch of calcite-carbonatitic melt (calcite II).