东风山群和塔东群位于松嫩-张广才岭地块东缘，作为该地块最重要的所谓“早期”地质单元，它们当中不同性质变质单元的识别和不同时代、不同变质作用类型的确定，是揭示松嫩-张广才岭地块的构造属性和区域构造演化历史的关键。本项目拟通过系统的岩石学、矿物学、年代学和地球化学等研究，查明东风山群和塔东群的岩石成因类型与组合关系，确定不同变质单元的原岩性质、原岩时代、变质作用类型、变质时代、变质温压条件及其时空演化规律，揭示东风山群和塔东群原岩建造和变质作用性质。结合区域岩浆作用、沉积作用以及区域构造演化历史的研究，最终揭示东风山群和塔东群变质作用的地球动力学背景，为区域地质演化提供重要约束。

The Dongfengshan and Tadong groups, previously considered as the most important ‘Proterozoic’ geological units in NE China, are located in the eastern margin of the Songnen–Zhangguangcai Range Massif. The identification of the metamorphic units with different properties and different types of metamorphisms with different times within them is the key to reveal the tectonic attribution of the Songnen–Zhangguangcai Range Massif and regional tectonic evolution. Based on the petrology, mineralogy, geochronology and geochemistry of metamorphic rocks from the Dongfengshan and Tadong groups, this program ① ascertains the petrogenesis of these rocks and the relationship between different types of the rock associations; ② determines not only their protolith nature and formation ages, and metamorphic type, time and P-T condition, but also the spatial-temporal evolution of different metamorphic units; and ③ reveals the protolith formation and nature of metamorphisms of these two groups. Combined with the regional magmatism, sedimentation, and tectonic evolution history, this program finally reveals the geodynamic setting of the metamorphisms within the Dongfengshan and Tadong groups, and further constrains the regional geological evolutionary history.