利用接收函数和多次反射波成像联合约束华南岩石圈结构

自显生宙以来，华南块体既经历了早期多期次的拼合，又经历了后期伸展环境及岩浆作用的强烈改造。复杂的构造活动不仅改变了块体内部的构造格局和深部结构，尤其是岩石圈的结构和性质，而且必然在块体拼合和相互作用的区域、造山带及边界区域留下演化的印迹。因此，深入了解华南块体内部及边界区域的岩石圈结构和性质的差异性，尤其是岩石圈底界面的深度和性质，不仅能够对大规模花岗岩浆和成矿作用的分布和成因机制提供岩石圈底部热状态和流变性特征信息，同时可以为区域构造演化及深部动力学机制提供有效的地震学约束。因此，本项目拟收集区域内分布的宽频带流动地震台阵和国家及省级台网布设的地震台站的波形数据，采用接收函数和多次反射波成像方法获取华南块体全区域的岩石圈精细结构信息。并结合其他地球物理学观测结果，共同探讨华南块体不同构造单元的岩石圈结构特征差异及相关的动力学过程。

Since the Phanerozoic, there is a complicated tectonic history of South China, including the multiple stages of collision and amalgamation, the intensive extensional deformation, and widespread magmatism. Tectonic pattern and deep structure of South China, especially the lithospheric structure, thus have been reformed. The tectonic diversity inevitable left imprints on the lithospheric structure in the different tectonic domains of South China. Thus, studies on the detailed lithospheric structure beneath different tectonic domains could not only provide information on the thermal and rheological characteristics of the lithosphere-asthenosphere boundary for the widespread granite magma and mineralization, but also provide constrains on the tectonic evolution and the associated dynamic mechanism of South China. In this project, we intend to collect as more as possible waveform data recorded by temporary and permanent seismic stations distributed in South China, and to get the detailed lithospheric structure by the joint of receiver function and multiple reflection waves migration. Combined with other geophysical observations, we could investigate the inherent heterogeneity of lithospheric structure, the associated tectonic evolution, and dynamic mechanism of South China.