辽北地区位于华北克拉通的北缘增生带,其晚古生代-早中生代不同类型火成岩的成因及形成的动力学背景研究是解决西拉木伦-长春缝合带地质演化的关键。本项目选择该区广泛出露的晚古生代-早中生代花岗质侵入体 (包括辉长岩和闪长岩)和高镁安山岩开展系统的年代学、岩石学、矿物学和地球化学研究，旨在查明区域晚古生代-早中生代岩浆活动的时空格架，明确其时空分布规律特征,查明该期侵入岩和火山岩的主要岩石类型及其组合，确定该期花岗质岩浆和高镁安山岩岩浆的源区性质及岩浆作用过程，进而理解这些不同岩类的岩浆成因和可能的关系，探讨区域晚古生代-早中生代岩浆作用的本质和可能的深部动力学过程。该项研究不仅对揭示古亚洲洋的地质演化具有重要意义，而且对理解大陆增生型造山带演化不同阶段的深部岩石圈演化等动力学过程具有重要的理论价值。

The northern Liaoning is located in the northern accretionary belt of the North China Craton, the study of petrogenesis and geodynamical setting of the late Paleozoic-early Mesozoic igneous rocks of different types from this region is the key to figure out the geological evolution of the Xra Moron–Changchun suture. This project conducts an integrated geochronological, petrological and geochemical study of the widespread late Paleozoic-early Mesozoic granitic intrusions (include gabbros and diorites) and high-Mg volcanic rocks in the northern Liaoning, in order to (1) investigate the geochronological framework and temporal-spatial variations of the late Paleozoic-early Mesozoic magmatism; (2) ascertain the rock types and association of the intrusive and volcanic rocks of this period; (3) determine the source nature and magmatic processes of these granitic and high-Mg andesitic magmas; (4) further understand the petrogenesis and their relationships of the rocks of different types; and (5) accordingly discuss the essence of the regional late Paleozoic-early Mesozoic magmatism and its possible deep dynamic process. This project is of not only important significance for revealing the geological evolution of the Paleo-Asian Ocean, but also significant theory value for understanding different stages of evolution of the deep lithosphere in the continental accretionary orogenic belt.