河流水系沉积物中的碎屑锆石在示踪河流物源和探索大陆地壳的形成与演化过程中起到了不可替代的作用，目前国内外在这方面已经开展了大量研究。本项目拟选择江西省的最大河流—赣江流域不同区段河沙中的碎屑锆石作为研究对象，综合应用背散射(BSE)和阴极发光(CL)显微照相技术及拉曼光谱分析技术，在此基础上选择典型的锆石颗粒/区域开展激光剥蚀电感耦合等离子体质谱(LA-ICP-MS)和装备有激光熔样系统的多接收器电感耦合等离子体质谱(LA-MC-ICP-MS)原位分析，系统研究碎屑锆石所具有的内部结构、矿物包裹体、微量元素、U-Pb年代学和Lu-Hf同位素特征。综合前人的有关成果，查明赣江河流碎屑锆石的年龄谱特征及其物质来源，探讨华夏陆块尤其是华夏陆块西部地壳的形成和演化特征，厘清赣江流域水系沉积物中碎屑锆石的地壳居留时间和锆石循环时限特征及其与构造-岩浆作用之间的关系。

Modern rivers have large drainage areas and strong transport capacities, so detrital zircons from river sediments can provide a valuable opportunity to trace sediment provenances of the river and to explore the crustal growth and evolution history. Ganjiang River, one of eight major tributaries of Yangtze River, mainly located in the hinderland of Cathaysia Block, southeastern China, has a length of 823 km and a drainage area of 82809 km2. In the current project, we will choose detrital zircons from Ganjiang River to carry out zircon internal structure, mineral inclusion, trace element, U-Pb and Lu-Hf isotope analyses. The zircon internal structure, mineral inclusion, trace element data can provide rigorous constraints on its origin. Integrated zircon U-Pb age spectra and Lu-Hf isotope data can be used to trace sediment provenances of the Ganjiang River and to depict the crustal growth and evolution history of Cathaysia Block. Additionally, the relationship between zircon residence and recycling times and tectonic-magmatic activity is also an important topic of this study.