【摘要】 东北亚中生代火山岩包括大陆边缘北北东向线型火山岩带，以及大陆内部俄罗斯西伯利亚、蒙古、中国大兴安岭等面型火山岩带。它们是东北亚古亚洲洋构造域向太平洋构造域转换时期，深部地幔地球化学过程以及东亚大陆与古太平洋板块相互作用的产物。对它们的研究涉及古生代古亚洲构造域闭合过程的深部地幔的动力学和地球化学演化历史，以及东亚大陆边缘由被动边缘向活动大陆边缘转换历史。古亚洲域大洋岩石圈向地幔深部潜入而引发的热地幔柱的上升，是东北亚中生代大地构造演化和岩浆作用的重要控制因素。更多还原

【Abstract】 Mesozoic volcanic rocks in northest Asia can be grouped into three volcanic belts, i. e. intracontinental circular volcanic belt, latitudinal volcanic belt and continental marginal NNEoriented volcanic belt. The formation of the volcanic rocks was related to the complicated geodynamical processes, such as the tectonic evolution of both Paleo-Asia and Pacific tectonic regimes and the geochemical processes of deep mantle. As the oceanic lithsphere of Paleo-Asian regime was subducted down into deep mantle, the uprising of hot mantle plume at the 670 km discontinuity was the key factor that controlled the Mesozoic tectonic evolution and volcanic activities in northeast Asia.The relationship among mantle plume and lithospheric evolution and igneous activities will be the key task in the future study on the tectonic evolution and the origin of the megascale volcanic province in northeast Asia.更多还原