In this study, syenite and monzonites from the mid Cretaceous Mount Dromedary were examined by combining new LA-ICP-MS analytical data and published whole rock data. This was done in order to discuss the distribution of trace elements and REEs in radioactive minerals and silicate minerals, and the crystallization differentiation between minerals. The igneous complex is a group of small plutons that occurs at the eastern edge of the mid Paleozoic Lachlan Fold Belt near the east coast between Narooma and Bermagui, New South Wales. The pluton is characterized by concentrically arranged sequence of compositionally and texturally distinct zones. There is a mafic (monzonitic) outer ring, intermediate, and felsic (syenitic) core zones. As well as monazite, allanite and zircon, we suggest that titanite and apatite also can have the potential for controlling Th-U distribution in bulk rock, because these are common accessory minerals.
