早期地壳生长与克拉通化过程是前寒武纪地质研究的重要科学问题。华北早前寒武纪地质演化过程存在很大争议，并存在 ~2.5 Ga和~1.8 Ga克拉通化两种观点。新太古代早期和古元古代岩浆事件研究可为重塑华北早期历史提供重要的地质约束。本项目选择华北克拉通中部阜平杂岩中~2.7Ga片麻岩和2.1~2.0 Ga花岗岩（部分基性岩）为研究对象，以野外地质和岩石学研究为基础，以锆石SHRIMP（部分LA-ICPMS锆石/榍石/斜锆石）U-Pb定年、全岩地球化学（部分矿物化学）和Sr-Nd-Pb-O-Hf同位素示踪为主要手段，查明区域内新太古代早期片麻岩的分布规模、成因与构造环境，探究古元古代中期岩浆事件的构造动力学机制。该项目对深入认识华北~2.7 Ga的地壳生长特征，构建客观、合理的华北克拉通早期演化模式提供重要的限定资料。

The crustal growth and processes of cratonization are key subjects on the Precambrian geology of the Earth. Hot debate occurs on the evolutionary history of the North China Craton (NCC). Some researchers propose 2.5 Ga amalgamation of the NCC by several microblocks. Whereas, others consider that the NCC finished cratonization at ca. 1.8 Ga. Study on the early Neoarchean and Paleoproterozoic magmatic events will provide the better constraints on the evolutionary process of the NCC. In this proposal, we study on the ca. 2.7 Ga gneisses and 2.1-2.0 Ga intrusions (granitic and some mafic plutons) in Fuping Complex, central of the NCC. Based on the detailed geological investigation and petrological studies, we choose samples for zircon SHRIMP and/or LA-ICPMS U-Pb dating (to the mafic rocks by sphene and baddeleyite U-Pb dating), whole rock geochemical (mineral composition analyses for the mafic plutons) and Sr-Nd-Pb-O-Hf isotopic analyses. We intend to: 1) discover the scale of the early Neoarchean gneisses, and disclose their petrogenesis and tectonic setting, and meanwhile, 2) reveal the tectonic mechanism of the middle Paleoproterozoic magmatism. The results are of great significance to research the 2.7 Ga crustal growth, and build the reasonable evolutionary model on the NCC.