Geomorphology of Iwo-jima and Surrounding Sea Floor
Geomorphology of Iwo-jima and Surrounding Sea Floor
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硫磺岛及周边海底地貌
DOI：
10.5026/jgeography.94.424
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发表时间：
1985
影响因子：
3.1
通讯作者：
T. Miyauchi
中科院分区：
文献类型：
--
作者：
S. Kaizuka;S. Kato;S. Nagaoka;T. Miyauchi
硫磺岛火山是一座海拔1500-2000米的成层火山，火山口直径约10公里。岛上的海洋阶地分为 20 多个台阶，显示了过去几个世纪的抬升速度和模式。活动断裂的分布，集中在千鸟原地峡，与千鸟原椭圆隆起的模式有关。比较1934年、1945年和1981年的水深测量结果表明，岛屿周围浅水区出现了隆升，但尚未到达火山口边缘。
Iwo-jima volcano is a stratovolcano of 1500-2000 m in elevation, having a caldera of about 10 km in diameter. Marine terraces on the island, classified into more than 20 treads, indicate the rate and mode of uplift during the past several centuries. Distribution of active faults, concentrated in Chidorigahara isthmus, are related to the mode of Chidorigahara elliptical uplift. Comparison among the 1934, 1945 and 1981 bathymetries shows that uplift has occurred at shallow waters around the island but it has not reached the caldera rim.