伊豆・小笠原弧の地学現象に見られる南北対立はなぜ生じたか

抄録

The Izu-Ogasawara Arc is divided into two parts, the northern and southern, at its centralpart. There are notable differences between the two parts in submarine topographic feature, rock chemistry, earthquake hypocenter distribution, etc. The two parts of the arc originallyindependent arcs which have different development histories and joined together at the bendingpart of pre-existing arc. They were rifted by the wedge of oceanic crust which is caused by the Parece Vela Basin opening. The different development histories are reflected in the abovementioned differences between them.