野外考察和室内综合分析表明,日本中央构造线的右旋位错自上新世以来一直延续至今.资料表明,晚更新世以来的平均位错速率达6 .1 m m/a .高滑动速率而近1 ka 来无强破坏性地震发生的事实意味着该断裂现今可能处在蠕滑运动为主的相对稳滑...野外考察和室内综合分析表明,日本中央构造线的右旋位错自上新世以来一直延续至今.资料表明,晚更新世以来的平均位错速率达6 .1 m m/a .高滑动速率而近1 ka 来无强破坏性地震发生的事实意味着该断裂现今可能处在蠕滑运动为主的相对稳滑状态.断裂带结构简单、走向稳定、高角度而无横向断裂切割等特点有利于断裂的蠕滑运动.展开更多
The Anninghe fault is one of the significant earthquake-generating fault zones in the Southwest China. Local historical record shows that a M2≥7 strong earthquake occurred in the year of 1536. On the basis of the det...The Anninghe fault is one of the significant earthquake-generating fault zones in the Southwest China. Local historical record shows that a M2≥7 strong earthquake occurred in the year of 1536. On the basis of the detailed air-photographic interpretation and field investigation, we have acquired the following knowledge: ① The average sinistral strike-slip rate since the Late Pleistocene is about 3~7 mm/a; ② There is important reverse faulting along the fault zone besides the main left-lateral strike-slip motion, and the shortening rate across the Anninghe fault zone due to the reverse faulting is about 1.7-4.0 mm/a. If the Xianshuihe fault zone is simply partitioned into the Anninghe and Daliangshan faults, we can also get a slip rate of 3-7 mm/a along the Daliangshan fault zone, which is the same as that on the Anninghe fault zone. Moreover, on the basis of our field investigation and the latest knowledge concerning the active tectonics of Tibetan crust, we create a dynamic model for the Anninghe fault zone.展开更多
文摘野外考察和室内综合分析表明,日本中央构造线的右旋位错自上新世以来一直延续至今.资料表明,晚更新世以来的平均位错速率达6 .1 m m/a .高滑动速率而近1 ka 来无强破坏性地震发生的事实意味着该断裂现今可能处在蠕滑运动为主的相对稳滑状态.断裂带结构简单、走向稳定、高角度而无横向断裂切割等特点有利于断裂的蠕滑运动.
基金Joint Seismological Science Foundation of China (105066)National Natural Science Foundation of China (40472109)the SASAKAWA Scientific Grant from the Japan Science Society.
文摘The Anninghe fault is one of the significant earthquake-generating fault zones in the Southwest China. Local historical record shows that a M2≥7 strong earthquake occurred in the year of 1536. On the basis of the detailed air-photographic interpretation and field investigation, we have acquired the following knowledge: ① The average sinistral strike-slip rate since the Late Pleistocene is about 3~7 mm/a; ② There is important reverse faulting along the fault zone besides the main left-lateral strike-slip motion, and the shortening rate across the Anninghe fault zone due to the reverse faulting is about 1.7-4.0 mm/a. If the Xianshuihe fault zone is simply partitioned into the Anninghe and Daliangshan faults, we can also get a slip rate of 3-7 mm/a along the Daliangshan fault zone, which is the same as that on the Anninghe fault zone. Moreover, on the basis of our field investigation and the latest knowledge concerning the active tectonics of Tibetan crust, we create a dynamic model for the Anninghe fault zone.