佳木斯地块是兴蒙造山带东部最重要的一个微陆块，该地块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佳木斯地块东缘晚古生代地质演化的关键。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，并结合其东部跃进山增生杂岩带开展精细的年代学、岩石学、矿物学和元素-同位素地球化学研究，以及锆石的微区原位Hf-O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关系，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兴蒙造山带的地质演化的研究具有重要意义，而且对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。

Jiamusi Massif is one of the most important microcontinents in the Xing'an-Mongolian Orogenic Belt (XMOB), the study of petrogenesis and geodynamical setting of the Late Paleozoic igneous rocks of different types from this massif is the key to figure out Late Paleozoic geological evolution of the eastern margin of the Jiamusi Massif. This project focuses on the Late Paleozoic granitic intrusions (include gabbros and diorites) and volcanic rocks, exposed over a large area, and the rocks from the Yuejinshan accretionary complex belt in the east as well. Geochronological, petrological, mineralogical, element-isotope geochemical studies, together with in situ zircon Hf- and O- isotope analysis, have been conducted for the Late Paleozoic igneous rocks and associated accretionary complexes, in order to (1) investigate the geochronological framework of the Late Paleozoic magmatism and constrain their spatial and temporal variations; (2) ascertain the rock types and association of the intrusive and volcanic rocks of this period and determine the source nature and magmatic processes of these granitic and basaltic magmas; and (3) further understand the petrogenesis and their relationships of the rocks of different types, and also discuss the essence of the regional Late Paleozoic magmatism and its possible deep dynamic process. This study not only makes it an important significance for revealing the geological evolution of the Xing'an-Mongolian Orogenic Belt, but also has an important theory value for understanding different stages of evolution of the deep lithosphere in the continental accretionary orogenic belt.