摘要
Abstract Basal conglomerates can preserve some important information for crustal evolution of an orogenic belt.Detailed LA-ICP-MS U-Pb dating and LA-MC-ICP-MS Lu-Hf isotope analysis were carried out on detrital zircons from the basal conglomerates of the Luojiamen,Baizhu and Xiuning Formations in the Jiangnan Orogen,South China.U-Pb dating results suggest that the maximum depositional ages for the above three formations were ~860Ma,~825Ma and ~765Ma respectively.