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在板块构造体制中,海沟—岛弧—弧后(沟—弧—弧后)体系的位置被认为和消减带的位置一致,沟—弧—弧后体系的各种重要特征由消减作用直接引起。而这些特征的某些方面,象岛弧地震、地震波速衰减结构及海沟地貌用消减模式能够得到合理的解释。但是要解释下列两个基本问题却很困难:(1)岛弧—弧后区高热流的热态和岛弧
In the plate tectonics, the location of the trench-island arc-back arc (back-arc-back arc) system is considered consistent with the location of the abatement zone. Various important features of the trench-arc-back arc system are directly induced by the abatement . Some aspects of these features, such as the Xiangyao earthquake, the attenuation structure of seismic velocity attenuation and the reduction pattern of trench topography, can be reasonably explained. However, it is difficult to explain the following two basic problems: (1) island arc - the thermal state of the high heat flux in the back arc region and the island arc