阿尔山火山地区宽频带流动地震观测与深部结构研究

针对兴蒙造山带南段阿尔山火山岩浆源区的起源深度及成因机制这两个基本科学问题、以及现有观测资料的不足，拟在阿尔山火山地区布设宽频带流动地震台阵，进行为期两年的观测，获取地震观测资料，开展接收函数偏移成像、背景噪声格林函数和天然地震面波层析成像、接收函数和面波频散联合反演、远震体波走时层析成像等研究，获得阿尔山火山地区的壳幔三维速度结构，为甄别阿尔山火山是起源于软流圈还是地幔过渡带、是岩石圈拆沉还是俯冲滞留板片脱水或其他因素造成，提供地震学观测证据。

Based on the problems related to the depth of magma source and genic mechanism as well as the resolving potential of the available data about the Aershan volcanoes, the famous Quaternary intraplate volcanoes located in the southern Xing’an-Mongolian orogeny, we propose to deploy mobile broadband seismometers around the Aershan volcanoes, to record continuous seismic data for 2 years. Receiver function migration, surface wave dispersion tomography of ambient noise Green function and earthquake data, joint inversion of receiver function and surface wave dispersion, teleseismic body wave travel time tomography are conducted to obtain the 3D crustal and mantle velocity model about the Aershan volcanoes, to provide the seismological evidences to address the problems whether the Aershan volcanoes originate from the asthenosphere or mantle transition zone, induced by the lithospheric delamination or the dehydration of stagnated slab or other mechanism.