扬子板块西部古元古代早期岩浆事件的时间和性质

对扬子板块西部出露的古元古代早期岩浆岩进行详细的锆石U-Pb年代学，岩石地球化学及同位素地球化学的研究，结合该时期碎屑岩浆锆石年龄谱结构和O-Hf同位素组成，确定扬子板块西部古元古代早期岩浆作用的时间、性质和形成的构造背景，揭示扬子板块古元古代弧陆碰撞之前的增生拼合历史，为扬子板块早期的演化提供重要的地球化学制约。

In this project, we will carry out an integrated study of zircon U-Pb ages, whole rock major and trace element characteristics, Sr-Nd-O-Hf isotope compositions for early Paleoproterozoic magmatic rocks from the western part of the Yangtze Block. U-Pb ages and O-Hf isotope compositions will also be obtained for detrital magmatic zircons with early Paleoproterozoic ages from the western part of the Yangtze Block. The combined results will be used to discuss the accretion and amalgamation of the western and eastern parts of the Yangtze Block, and thus can provide impotant implications for the early evolution of the Yangtze Block.