全球范围内在新太古代时期发育强烈的富钾花岗质岩浆作用，是探索新太古代-古元古代过渡期地壳演化和壳幔动力学机制转变的重要窗口。本项目拟对华北克拉通北缘辽东变质地块中代表性的新太古代富钾质花岗岩体进行系统的野外地质、岩石学、全岩地球化学以及锆石、独居石等副矿物U-Th-Pb-Lu-Hf-O同位素和微量元素研究，重点解剖富钾质花岗岩体的岩石组合、时空分布、岩浆演化期次、不同期次岩浆作用的源区性质、岩石成因及其反映的壳幔作用和动力学机制，分析地壳生长和再循环过程，明确钾质的来源和富集机制。这对解决华北克拉通新太古代地壳生长方式和壳幔动力学过程、探讨太古宙-元古宙过渡阶段地壳演化转折和壳幔动力学机理等重大科学问题具有重要的意义。

Neoarchean potassium-rich granitoid magmatism was intensively developed within ancient cratons globally, and they can provide valuable insights into the transformation mechanism of crustal evolution and crust-mantle geodynamics during the transition from Neoarchean to Paleoproterozoic era. In this proposal, systematic field geological, petrological, and whole-rock geochemical data are going to be carried out for the representative Neoarchean potassium-rich granitoid plutons in the Eastern Liaoning Province along the northern margin of the NCC. Combined with comprehensive U-Th-Pb-Lu-Hf-O isotopic and trace element analyses for the accessory minerals, e.g., zircon and monazite, these data are aimed to (1) decipher the lithological assemblages, temporal-spatial distributions, magmatic evolution stages as well as the magma sources, petrogenesis, crust-mantle interactions, and geodynamic regime for each magmatic stage; (2) discuss related crustal growth and recycling processes; and (3) clarify the sources and enrichment mechanism of potassium in the magmatic system. This study is not only critical for unraveling the Neoarchean crustal growth modes and crust-mantle geodynamic processes for the NCC, but also important for exploring the crustal-mantle geodynamic regime responsible for the global transformation of crustal evolution pattern during the Archean-Proterozoic transition in general.