苏北盆地作为中国东部中、新生代的张性盆地之一,其断裂构造发育,岩浆活动频繁,新生代以来火成岩多为基性喷发岩和浅成侵入岩,具有时代越新,越偏碱性的特点,说明了岩浆源较深、拉张作用导致的深大断裂活动与岩浆岩关系密切。岩浆活动是板块构造运动的产物,是区域构造运动的表现形式之一,通过对火成岩特征和演化的分析,可以研究构造运动的强弱和对构造圈闭的影响。 As one of the Meso-Cenozoic extensional basins in the eastern part of China, the northern Jiangsu basin developed fractured tectonics and magmatic activity. Most of igneous rocks are basic eruption rocks and shallow intrusive rocks since Cenozoic, It shows that the deep magmatic source is closely related to the magmatic rocks due to the deep magmatic source. Magmatic activity is a product of plate tectonics and is one of the manifestations of regional tectonic movement. By analyzing the characteristics and evolution of igneous rocks, we can study the strength of tectonic movement and the impact on tectonic traps.