岛弧后的边缘盆地,是与海洋岩石圈消减有关的主要特征。这些盆地大多数具有一些能够说明它们可能是由扩张形成的性质。有人已经提出,消减岩石圈在软流圈中诱发的对流,是产生岛弧间扩张的一种机制(Hsui等,1977)。图1表示了这种机制以及俯冲块、诱发流动和 The marginal basins behind the island arc are the main features associated with the subduction of the oceanic lithosphere. Most of these basins have some properties that indicate that they may be formed by expansion. It has been suggested that the reduction of the convection induced by the lithosphere in the asthenosphere is a mechanism that produces inter-island dilatation (Hsui et al., 1977). Figure 1 shows this mechanism as well as subducting blocks that induce flow and flow