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从全球板块系统来看,中国大陆周边板块活动是其地壳运动的主要外部力源,明确周边板块与中国大陆间较精细的三维几何接触方式对中国大陆动力学研究具有实际意义.本文首先基于研究区域地震活动参数,引用Hayes等在2009和2010年提出的Slab1.0模型,对其进行改造以适用于研究缅甸弧俯冲带处欧亚大陆与印度板块接触的几何产状.其次,沿缅甸弧俯冲边界带截取了166个剖面,依次考察各剖面的震源深度分布情况,对其进行线性平面与非线性曲面拟合,定量地给出了缅甸弧俯冲带东向俯冲的三维几何产状及俯冲范围.最后,针对缅甸弧俯冲带上6个典型剖面的震源深度分布情况,并联合震源机制解和地质构造背景讨论并初步给出了该俯冲带可能的动力作用模式.本文企望为研究中国大陆与周边板块边界几何接触方式提供一个初步方案,并为板块间的动力作用及相关地球动力学研究提供基础研究资料.
From the perspective of the global plate system, plate activities around the Chinese mainland are the main external sources of crustal movement, and it is of practical significance to clarify the finer three-dimensional geometric contact between the surrounding plate and the Chinese mainland for the study of dynamics in China .Firstly, Regional seismicity parameters, the Slab1.0 model proposed by Hayes et al in 2009 and 2010 is cited and adapted to study the geometrical shape of the contact between Eurasia and India plate at Burma’s arc subduction zone.Secondly, A total of 166 sections were taken from the subducting boundary zone. The focal depth distribution of each section was investigated in turn. The linear and non-linear curves were fitted to the surface of the subduction boundary zone. The 3D geometric shape and subduction Range.Finally, according to the focal depth distribution of 6 typical sections in the Burma arc subduction zone, the possible dynamical mode of this subduction zone is discussed and discussed in combination with focal mechanism solutions and geological tectonics. Provide a preliminary solution to the geometrical contact with the boundary of the adjacent plate and provide the dynamic action and the related earth movement Studies provide the basis for research data.