华南是我国最重要的稀有-稀土金属矿床的分布区域。前人对这些矿床和相关的花岗质岩石开展了广泛的研究，取得了丰硕的成果。但是对这些成矿作用的物质来源，以及相关的花岗岩与出露的前寒武纪基底变质岩的关系的研究非常薄弱。本项目拟以华南(扬子南缘江南造山带和华夏地块)的前寒武纪基底变质岩作为研究对象，开展岩石学、矿物学、元素-同位素地球化学和年代学研究，以期查明华南基底变质岩中稀有-稀土金属元素的丰度和分布规律、稀有元素在基底岩石中的赋存状态、以及它们的富集机制。本项研究将解决华南稀有-稀土元素成矿作用的”源”的问题，并为揭示“成矿元素从地幔到地壳：地球多圈层相互作用与关键金属元素富集机制”以及华南稀有-稀土金属成矿花岗岩与基底变质岩的成因联系提供重要的科学依据。

South China is one of the most important regions of the rare-metal and rare-earth metal deposits in China. Previous researches mainly focus on the metallogenesis of these deposits and the origin of the related granites. However, the source of the ore-forming materials of these deposits and the relationship between the related granites and Precambrian basement rocks in South China are not well constrained. This project will carry out the integrated petrologic, mineralogical, element-isotope geochemical and geochronological studies on the Precambrian basement rocks in the Cathaysia Block and the Jiangnan Orogenic Belt, southern Yangtze Block, in order to find out the abundance and distribution patterns of these rare-metal and rare-earth metal elements in the Precambrian basement, the occurrence of these elements in the basement rocks, their enrichment mechanism during rock formation. This project will also reveal the source of the rare-metal and rare-earth metal deposits in South China, and provide important evidence for unraveling the interaction among the multilayers, enrichment mechanism of the critical metal elements, and petrogenetic link between the deposit-bearing granites and Precambrian basement metamorphic rocks.