板片深部俯冲动力学研究的新进展

New progress on geodynamics of slab deep subduction

高精度的层析成像结果显示了全球范围内形态各异的俯冲板片,这充分表明地球动力学过程的复杂性.本文简单回顾了影响板片俯冲的主要因素和对俯冲板片有关的,如对地震、火山、弧后变形等地球物理现象的各种合理解释.讨论中国东北新生代火山的地球动力学背景可能是不同于一般俯冲带火山的成因.

Global seismic tomography results with high resolution show that the slabs may have complex forms, which indicates the complicated process of geodynamics. Here, we collect main factors which influence slab subduction and reasonable views on geophysical scenarios related to slab subduction,such as earthquake, volcanism, and back-arc deformation, and discuss geodynamic settings of Cenozoic volcanism in NE China, which may be different from common volcanism related to subduction.