胶-辽-吉古元古构造带的构造属性及演化过程长期存在争议，辽东宽甸地区是胶-辽-吉古元古构造带构造属性研究的关键立典地区。项目拟以辽东宽甸地质区出露的多期花岗质岩石、基性侵入岩体及“上覆”变质火山-沉积岩系为重点研究对象，通过岩石学、变质地质学、同位素年代学、构造地质学及地球化学等多学科综合研究，查明古元古代多期花岗质岩石及基性侵入岩体的主要岩石类型，约束其源区性质、成因类型及其形成的构造背景；建立多期岩浆-变质、变形事件演化序列及年代学格架，确定“上覆”变质火山-沉积岩系的性质、原岩形成时代及变质时代、变质演化P-T-t轨迹样式、及其与多期岩浆事件的成因关系；进而综合探讨胶-辽-吉古元古构造带的构造属性及演化模式。该项研究对揭示华北克拉通的形成演化、陆块聚-散的动力学过程及构造背景具有重要的科学意义。

The nature and evolutionary history of the Jiao-Liao-Ji Tectonic Belt (JLJTB) always remain considerable controversies. The Kuandian area is the key area for study on the nature and evolutionary history of the JLJTB. Therefore, we would like to carry out studies on the Paleoproterozoic polyphase granitoids and mafic intrusions, and overlied metamorphic volcanic-sedimentary successions outcropped in the Kuandian area using petrology, metamorphic geology, isotopic geochronology, structural and tectonic geology and geochemistry, to ascertain rock assemblages of the Paleoproterozoic polyphase granitoids and mafic intrusions, to constrain their sources, petrogenesis and tectonic setting, to construct the geochronological framework of polyphase magmatic-metamorphic-deformed events, to define the nature, protolith and metamorphic ages, metamorphic P-T-t path of the metamorphic volcanic-sedimentary successions, to confirm genetic relationship between the metamorphic volcanic-sedimentary successions and polyphase magmatic events. Then, by synthesizing the above results, we will discuss the nature and evolutionary model of the JLJTB. This study is of important implications to better understand the formation, evolution, assembly of blocks and its tectonic setting of the North China Craton.