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1.序言硫黄岛是由伊豆小笠原山火弧-七岛硫黄岛海岭南部的火山列岛构成的一个火山岛。通过对现存的许多海成阶地的考察,测定阶地面上的珊瑚年代,对比新旧地形图,观察原来海岸附近存在的地物,以及高度测量、水准测量等得知,该岛每年有10多厘米的明显变化。而除了喷气活动外,还存在很多新断层,目前正在观测其发展。此外,还了解了该岛屿的地质
1. Preface Sulfur Island is a volcanic island formed by the volcano arc in the Izu Ogasawara Hills - the southern part of the Qudao Sulfur Huangdao Ridge. By examining many existing sea-level terrains, determining the age of the coral on the terraces, comparing the old and the new topographic maps, observing the features existing near the coast, and measuring the height and leveling, it is found that there are more than 10 centimeters The obvious change. In addition to jet activities, there are still many new faults, and its development is being observed. In addition, we learned about the geology of the island