吉黑东部中生代增生杂岩为我国东部地区古太平洋板块俯冲-增生过程的关键直接记录，对限定古太平洋的俯冲-增生历史具有重要的理论意义。本项目拟以该增生杂岩为研究对象，在详细的大比例尺构造-岩浆-混杂岩地质填图基础上，结合变质-变形与构造几何学、运动学特征分析，查明以逆冲断层-叠瓦状褶皱-构造混杂为代表增生杂岩的构造组合特征及其与俯冲极性的关系；研究典型增生杂岩的空间分布规律与典型物质组成，结合地球化学测试，以确定其构造属性和成因；应用锆石和各类变质矿物的现代同位素定年技术，综合限定成岩与不同变质阶段的变质事件年龄，进而刻画该增生杂岩的形成与增生就位过程。在此基础上，综合探讨东北中生代增生杂岩的时空演化过程及其与古太平洋板块俯冲-增生的关系。研究成果不仅为西太平洋板块对欧亚大陆的作用过程提供关键证据，也为创新和引领国际相关研究提供了最佳机遇。

The Mesozoic accretionary complex (MAC), located in the eastern part of the Jilin-Heilongjiang Provinces，is the key record to reconstruct the history of the Paleo-Pacific subduction-accretion system. Here，we propose to carry out a comprehensive investigation on the MAC in NE China integrating field mapping and petrological, geochronological and geochemical analyses, aiming to improve our understanding in the following aspects: (1) construct the polarity of subduction and tectonic assemblages of the MAC by the units of thrust faults, imbricate folds and tectonic mélange, based on detailed structural mapping, deformation and metamorphism, and geometry and kinematic analysis. (2) trace the origin and tectonic setting of the MAC, based on detailed analyses of the spatial and temporal distribution, rock assemblages and geochemical data. (3) define the ages of protoliths and metamorphism, based on dating of zircons and metamorphic minerals, respectively, using cutting-edge geochronological techniques. These multidisciplinary studies are expected to provide important new data to assess the spatial and temporal evolution of the MAC and its relationship to the Paleo-Pacific subduction-accretion system, which is essential to advance our understanding of the geodynamic interaction between the Western Pacific plate and the Eurasia continent. The proposed study would enhance the leading role of Chinese scientists in the international innovative research in the Pacific-related fields.