再论板块构造与地幔柱构造的相互关系——从研究日本列岛—松辽盆地深部构造得到的启示

Re-Discussion on the Relationship between Plate Tectonics and Mantle Plume Tectonics——Inspiration from the Study of the Deep Structures of the Japanese Archipelago-Songliao Basin

近半个世纪以来,由于板块构造及地幔柱构造学说日臻完善,已广泛受到中国地学界和地勘界的赞同和应用。论文是从对两者形成时代和板块驱动力的基本问题入手,进行了分析、讨论与商榷。主要是通过对自太平洋西缘的俯冲带,经日本列岛—日本海—长白山—松辽盆地的地质情况,根据最新的地震层析资料分析、研究,初步认为均与板块俯冲、碰撞和挤压作用及地幔柱活动的形成机制密不可分。由于当前对板块及幔柱运动年代学测定的精准度,存在着一定的不确定性,故提出"板块构造与幔柱构造相辅相成"的概念模型,无疑对今后松辽盆地深部勘查油气资源、长白山地区监测和预防火山灾害工作,都具有理论的指导意义。但对松辽盆地的冷幔柱运移及成藏时代集中在57～40 Ma的机理,尚需进一步深入研究。

In the last half century, the theory of plate tectonics and mantle plume tectonics has been widely accepted and applied by the geosciences and geodesy in our country due to the improvement of the theory of plate tectonics and slow-column tectonics. This paper begins with the basic problems of the forming times and the driving forces of the plate, and discusses them. Mainly through the geological conditions of the subduction zone from the western margin of the Pacific Ocean through the Japan Islands, the Sea of Japan, the Changbai Mountain and the Songliao Basin, and according to the latest seismic tomography data, the preliminary study shows that bothsubduction and slabstone subduction. Collision and compression are closely related to the formation mechanism of mantle plume activity. Due to the accuracy of current geochronological measurements of plate and mantle plume movements, the concept model of "plate tectonics and mantle plume structure complement each other" is proposed, which is suspected to be helpful to the exploration of oil and gas resources in the deep part of Songliao Basin in the future, and to the detection and prevention of volcanic disasters in Changbai Mountain area. All have the guiding significance of theory. However, the mechanism of cold mantle plume migration and accumulation age concentrated in 57~40 Ma in Songliao Basin needs to be further studied.