本项目拟以滇东南-越南北部和湘桂粤出露的基底岩石、基性-超基性岩、花岗岩以及基性火山岩或岩脉中的深源捕虏体和/或捕掳晶作为研究对象，经过对前加里东基底沉积岩组成的锆石U-Pb年代学三维填图和沉积相（盆地）分析，基性-超基性岩和花岗岩的岩石地球化学研究，变质-变形解译和构造分析，对比不同地区基底岩石和深部地壳的物质组成和形成历史，确定它们与扬子地块与华夏地块的亲缘关系，从而揭示扬子地块与华夏地块聚合过程中的造山作用的性质、形成时间和演化历史，以及扬子地块与华夏两地块西部分界线的确切位置。将华南西南的地壳演化过程与全球超大陆的形成事件对比，阐述华南地块对超大陆聚合和裂解事件的响应。根据不同地块基底岩石中成矿元素的丰度和分布规律，分析基底物质组成对华南不同地区某些矿床（如U,W矿）形成可能存在的控制作用，为矿床成因研究提供依据。

The objects of this project are pre-Devonian basement rocks and granites, mafic-ultramafic rocks, mafic dykes and their xenoliths and xenocrystic zircons in the southeastern Yunan Province - northern Vietnam and Hunan-Guangxi-Guangdong areas. The means include three - dimensional (locations - time) U-Pb age mapping of detrital zircons in the basement sedimentary rocks, analyses of sedimentary facies and basin type, geochemical study of mafic-ultramafic and granitic rocks, metamorphism-deformation analyses and the deciphering of structure. This project will use these comparisons between different areas to determine the affinity relationship of different areas with the Yangtze or Cathaysia Blocks, the western boundary between the Yangtze and Cathaysian Blocks and the position of the western extension of the Jiangnan Orogen, and further to reveal the orogeny process and Precambrian evolution histories of the Yangtze and Cathaysia Blocks. On the basis of the comparison of the tectonothermal events in the South China with the assembly and breakup of supercontinents in the whole earth evolution, this project attempt to unravel the relationship of the South China and these supercontinents. Based on the distribution and abundance of some metallogenic elements in the basement rocks in the different regions, the effect of the basement composotions on the formation of some mineral deposits (e.g. U, W, Sn) in the South China will be evaluated. It is very helpful to explore more effectively the ore deposits.