冲绳海槽是一个正在扩张的年轻弧后海盆。对这个海盆的研究在地层学、古海洋学、构造学、地震学及海底资源勘探等方面均具重要意义。这个海槽处在大陆地壳向大洋地壳转化的过渡性地壳域,许多人试图从冲绳海槽的研究中,获得关于洋盆早期演化的知识。本文根据反射地震资料(图1)就该海槽成因进行初步探讨。 Okinawa Trough is an expanding young backwater basin. The study of this basin is of great significance in terms of stratigraphy, paleoceanography, tectonics, seismology and exploration of seabed resources. This trough is located in the transitional crustal area where the continental crust is transformed into the oceanic crust and many attempt to obtain knowledge of the early evolution of the ocean basin from the study of the Okinawa Trough. Based on the reflection seismic data (Figure 1), this paper discusses the causes of the trough.