TECTONIC HISTORY OF THE ROKKO-AWAJI ACTIVE FAULT ZONE (THE SEISMIC SOURCE FAULT OF THE 1995 SOUTHERN HYOGO PREFECTURE EARTHQUAKE)

六甲淡路活动断裂带（1995年兵库县南部地震震源断层）的构造历史

• 批准号: 09640544
• 负责人: LIN Aiming
• 金额: $ 2.37万
• 依托单位: KOBE UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640544/
• 关键词: Paleoseismic event; Keicho-Fushimi earthquake; Gosukebashi fault; Rokko-Awaji active fault zone; Ashiya fault; Otsuki fault; S-C cataclasite; fault rock; 六甲-淡路活断層系; 五助断層; 活断層; 慶長-伏見地震; トレンチ発掘調査; 活動周期; 横ずれ

The following major research results have been obtained. (1) The results of trench surveys show that (i) there are at least four large seismic events produced by slip on the Gosukebashi fault in the Holocene in the southeastern Rokko Mountains of Japan, they are : the youngest event is associated with the 1596 y.A.D.Keicho-Fushimi large earthquake which occurred in the area around Kyoto-Kobe City ; the second younger event is probably correlated with the 416 y.A.D.Yamato earthquake which is the oldest historic earthquake in Japanese historic records ; (ii) the horizontal displacement produced by an individual event is about 1.5 m, and the recurrence of seismic events intervals about 1,200 years in the Gosukebashi fault. (2) The Otsuki fault and Ashiya fault zone are presently active, the former having a slip-rate of about lmm/y and the latter having a slip-rate of 0.5-0.85 mm/y in vertical in the late Quaternary. (3) Foliated cataclasites which display S-C fabrics similar to those of mylonites are found in granitic rocks along the Rokko-Awaji fault zone, Japan. It is revealed clearly that the S-C cataclasites in the Rokko-Awaji fault zone formed at temperatures between 150-250 0C corresponding to depths of 5-8 kin, at a continental geothermal gradient of 30 0C/km, before being uplifted and exposed. This study of cataclastically deformed rocks shows that the fault zone theology of the upper 5-10 km of crust is greatly influenced by deformational processes in S-C cataclasites.

取得了以下主要研究成果。(1)探槽调查结果表明：（1）全新世以来，在日本六甲山东南部的五辅桥断裂上至少发生了4次大地震，它们是：最年轻的一次与1596年发生在京都-神户一带的京町伏见大地震有关;第二次较年轻的地震可能与日本历史记载中最古老的大和地震有关;（ii）单次地震产生的水平位移约为1.5米，地震事件重现的间隔约为1，在五助桥断层200年。(2)大月断裂和芦屋断裂带目前都是活动的，前者在晚第四纪的垂直滑动速率约为1 mm/y，后者在晚第四纪的垂直滑动速率为0.5- 0.85mm/y。(3)在日本沿着六古-淡路断裂带的花岗质岩石中发现了具有与糜棱岩相似的S-C组构的片理化碎裂岩。研究表明，六古-淡路断裂带中的S-C碎裂岩形成于150-250 ℃，对应于5-8 km的深度，大陆地温梯度为30 ℃/km，然后被抬升出露。对碎裂变形岩石的研究表明，S-C碎裂岩中的变形过程对地壳上部5-10 km的断裂带流变性有很大影响。

项目成果

林 愛明: "六甲活動系の活動史-芦屋断層の分岐断層(鷲林寺断層◆)の第四紀後期の活動性" 平成10年度神戸大学都市安全センター研究報告. (印刷中). (1999)

林爱明：“六甲活动系的活动史-芦屋断层分支断层（Washirinji断层◆）的晚第四纪活动”1998年神户大学城市安全中心研究报告（1999年出版）。

Aiming Lin, Tadashi Maruyama and Takao Miyata: "Late Holocene activity of the Gosukebashi fault revealed by excavation study at the Nishigatani valley in the eastern Rokko Mountains, Japan." Active Fault Research. 18 (in press). (1999)

Aiming Lin、Tadashi Maruyama 和 Takao Miyata：“日本六甲山脉东部西河谷山谷的挖掘研究揭示了五助桥断层的晚全新世活动。”

Aiming Lin: "S-C fabrics of foliated cataclasites from the Rokko-Awaji fault zone, Japan. Extended abstract in "The GJS WORKSHOP on fault rocks and seismogenic process-Deformation of fault materials : Field observations, laboratory studies, and modeling""

林爱明：“来自日本六甲淡路断裂带的叶状碎裂岩的 S-C 结构。“关于断层岩石和地震过程的 GJS 研讨会 - 断层材料的变形：现场观察、实验室研究和建模”中的扩展摘要”

Aiming Lin, Takuya Wata and Tadashi Maruyama: "Late Quaternary activity of the Ashiaya fault." The Journal of Geological Society of Japan. 105 (in press). (1999)

Aiming Lin、Takuy​​a Wata 和 Tadashi Maruyama：“芦屋断层的晚第四纪活动”。

Aiming Lin: "Tree damage and surface displacement:The 1931 M8.0 Fuyun earthquake" The Journal of Geology. 106. 751-757 (1998)

林爱明：“树木损坏与地表位移：1931 年富蕴 M8.0 地震”地质杂志。