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岩浆的上涌会沿着板块扩张轴形成新的洋壳。这一现象似乎不只发生在扩张轴下面的狭窄地带。确切地说,熔融物质分布在宽度与深度均超过100km 的区域范围内。此外,熔融带位于快速运动板块轴下方一侧的中部。
The upwelling of the magma will form a new oceanic crust along the plate expansion axis. This phenomenon does not seem to occur only in the narrow axis below the expansion shaft. Specifically, the molten material is distributed over a range of 100 km in width and depth. In addition, the molten zone is located in the middle of the side below the axis of rapid traverse.