Holocene tectonics under tensional stress field in the mid-kyushu

九州中部张拉应力场下的全新世构造

• 批准号: 08640575
• 负责人: OKAMURA Makoto
• 金额: $ 1.34万
• 依托单位: Faculty of Science, Kochi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640575/
• 关键词: submarine fault; active fault; Holocene; neotectonics; mid-kyushu; 正断層群; submarine fault; active fault; Holocene; neotectonics; mid-kyushu; 正断層群

1. Submarine active faults distributed in and around the middle part of Kyushu were mapped using by high-resolution seismic survey and sediment sampled by piston coring.2. Submarine active fault found in the Omura Bay has cummulative displacement in the Holonene sdiment. Two cores were sampled from the both-side of the fault. Three times seismic events were recognized from the cores under precise correlation of the cores. The recurrence interval of seismic event estimated 3000 years, and each vertical displacement shows 30cm.3. The Hinagu fault were newly found in the Yatsushiro Sea, which show typical strike-slip drug fault. Fault activities analysed from the cores were two-times at least in the Holocene. Total vertical displacement of the Hinagu submarine fault shows 10 meters among the Holocene sediments.4. In the Ariake Sea, we found three small Holocene gravens extend from east to west.

1。使用高分辨率地震调查和用活塞Coring采样的高分辨率地震调查和沉积物2。在Omura湾发现的海底活性断层在众多的sdiment中具有切片位移。从断层的两侧采样了两个核心。在岩心的精确相关性下，从岩心识别了三次地震事件。地震事件的复发间隔估计为3000年，每个垂直位移均显示30cm.3。在Yatsushiro Sea新发现的Hinagu断层是典型的滑移药物断层。从核心分析的断层活动至少在全新世中为两次。 Hinagu潜艇断层的总垂直位移显示了全新世沉积物中的10米。4。在阿里亚克（Ariake）的海中，我们发现三个小的全新世肉汁从东到西延伸。