大兴安岭中-北部是古亚洲洋演化研究的重要地区之一，该区不同类型晚古生代火成岩的成因及动力学背景研究是解决贺根山-黑河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花岗质岩石侵入体 (包括辉长岩和闪长岩)和火山岩开展精细的年代学、岩石学、矿物学和元素-同位素地球化学研究，尤其是锆石的微区原位Hf同位素研究工作，旨在查明区域晚古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玄武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联系，探讨区域晚古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，而且对兴蒙造山带的地质演化及上古生界油气资源潜力的研究具有重要意义。

The middle-northern segment of the Great Xing'an Range is one of the vital areas for looking insight into the evolution of the Paleo-Asian Ocean. Petrogenesis and geodynamic settings of the widespread late Paleozoic igneous rocks in the area are essential for revealing the geological evolutionary history of the Hegenshan-Heihe suture zone. The late Paleozoic granitoids, including gabbros and diorites, and volcanic rocks are selected for systematic geochronological, mineralogical, petrological, geochemical and isotopic studies, as well as in situ zircon Hf isotopic analysis, in order to uncover the temporal- and spatial-distribution of the late Paleozoic magmatism, and further the rock types and associations of the granitoids and volcanic rocks. The purpose of the this integrated study is to look insight into the characteristics of the magma sources, genesis, magmatic processes and the possible genetic relationships of the granitic and basaltic magmas; and then the nature and possible deep geodynamic processes of the magmatism in the period. This research is essential for revealing not only the deep dynamic process of the lithosphere in continental accretionary orogenic belt in different stages, but also the geological evolutionary history and the potential of the oil and gas resources of the late Paleozoic in the Xing'an-Mongolian Orogenic belt.