太古宙绿岩带发育大量的变质火山岩，是研究早期地壳形成演化、地幔性质、壳幔相互作用及地球动力学过程的重要载体。本项目拟选择吉林夹皮沟绿岩带~2.7Ga变质火山岩为研究对象，通过全岩主微量元素与Sm-Nd同位素、地质年代学、锆石Hf-O同位素研究，解剖~2.7Ga变质火山岩的岩石组合特征、岩浆作用期次、地幔源区属性、岩石成因机制与壳幔动力学过程。通过与夹皮沟绿岩带大量分布的~2.6-2.5Ga变质火山岩研究成果的对比分析，讨论与总结2.7Ga与2.6-2.5Ga两期绿岩带的岩石组合与形成机制上的差异，分析华北克拉通东北部新太古代不同时期地壳形成演化的壳幔动力学过程。

The widespread metavolcanic rocks in Archean greenstone belt are important carriers to study the formation and evolution of early continental crust, the nature of mantle and crust-mantle interactions, and explore the relevant geodynamic processes. In this proposal, systematic whole-rock major and trace elements and Sm-Nd isotopes, geochronological and zircon Hf-O isotopes analyses will be implemented for the ~2.7 Ga metavolcanic rocks of the Jiapigou greenstone belt in Jilin Province, North China Craton. On the basis of these analyses, we aim to investigate the lithological assemblages, magmatism periods, source attribute, petrogenesis and crust-mantle dynamic processes of ~2.7 Ga metavolcanic rocks in the Jiapigou greenstone belt. By the contrastive research in ~2.6-2.5 Ga metavolcanic rocks in the Jiapigou greenstone belt, we discuss and conclude the differences in lithological assemblages, petrogenesis mechanism as well as geodynamic processes between these two periods of magmatism in the Jiapigou greenstone belt, and probe into the formation and evolution of crust and crust-mantle dynamics processes for different times of Neoarchean in northeastern part of North China Craton.