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对于岩石圈板块的演化来说,板块构造体系的关键因素是板块俯冲作用的发生。但是,现在对于板块俯冲的下伏机制还不清楚。由于使大洋岩石圈破裂需要千巴级的应力,所以板块破裂是产生新的俯冲带过程的一个重要方面。因此,在原先就比较薄弱的地带或者受到预应力的区域就将会首先发生俯冲作用。结果,在受到沉积负荷影响时,岩石圈发生下挠的部位就产生了转换断层和被动边缘。根据对被动边缘演化模式的研究,我们发现,仅被动边缘的老化还不足以使它们成为适于俯冲作用发生的场所。但是,年青岩石圈上大量沉积物负荷对于小洋盆的封闭可能是一种有效的机制。
For the lithospheric plate evolution, the key factor of the plate tectonic system is the plate subduction. However, the underlying mechanism for plate subduction is unclear. Since fractures of the oceanic lithosphere require thousands of bar-like stresses, plate tearing is an important aspect of the process leading to new subduction zones. As a result, subduction will first occur in regions that were previously weak or under prestressed conditions. As a result, the transitional fault and the passive edge were created at the site of deflection of the lithosphere when subjected to sedimentary loading. Based on the study of evolutionary patterns of passive edges, we find that the aging of passive margins alone is not enough to make them suitable sites for subduction. However, the large sediment load on the young lithosphere may be an effective mechanism for the closure of small oceanic basins.