• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Asian earth sciences >Spatial and temporal distribution of earthquake ruptures in the eastern segment of the Altyn Tagh fault, China
【24h】

Spatial and temporal distribution of earthquake ruptures in the eastern segment of the Altyn Tagh fault, China

机译：中国阿尔金塔格断裂东部段地震破裂的时空分布

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We performed field investigations to reconstruct the paleoearthquake history of eastern segment of the Altyn Tagh fault, NW China. Investigation at the Saohu spring trench and Shibaocheng west trench sites result in the identification three well-resolved earthquakes, designated as events E-1, E-2, and E-3, within the last similar to 7000 years. Radiocarbon dates of detrital charcoal provide constraints on the timing of faulting events. The most recent surface-rupturing earthquake, event E-1 dated between 2720 and 2800 years (a) before present (BP), had a rupture length of similar to 83 km, extending from Hongliuxia to Bagexia, with a coseismic displacement of about 4.5 m. The penultimate event, E-2, occurred between 4180 and 4970 a BP and may have ruptured from Subei to Bagexia with a coseismic displacement of 7 m. The third youngest event, E-3, occurred approximately 6440-7180 a BP and may have ruptured the whole segment from Subei to Kuantan mountain, with a coseismic displacement of 10 m. Holocene earthquake recurrence behavior on the eastern segment of the Altyn Tagh fault conforms to a variable slip earthquake model. Together with previous studies of slip rate, the huge displacement deficit along the eastern segment indicates a high earthquake risk for the surrounding region; the fault has the potential to trigger earthquakes of greater than M7.8, or a period of clustered earthquake activity. The displacement deficit could also indicate that sub-faults in the western Qilian Mountains have absorbed more lateral extrusion of the plateau during the Holocene, which would result in a decreasing fault slip rate and weakening of the eastern extension or outward expansion of the Altyn Tagh fault.
机译：我们进行了野外调查，以重建中国西北阿尔金－塔格断裂东部段的古地震历史。在骚湖春季海沟和石宝城西海沟的调查表明，在近7000年的时间里，识别出3个分辨率良好的地震，分别称为E-1，E-2和E-3事件。碎屑木炭的放射性碳日期限制了断层事件的发生时间。最近的一次表面破裂地震，即事件E-1，发生在2720年至2800年（a）之前（BP），其破裂长度大约为83 km，从红柳峡一直延伸到巴格夏，同震位移约为4.5米倒数第二个事件E-2发生在4180和4970 a BP之间，可能已从苏北破裂到巴基西亚，同震位移> 7 m。第三最年轻的事件是E-3，发生在大约6440-7180​​ a BP，可能已经破裂了从苏北到关丹山的整个段，同震位移> 10 m。 Altyn Tagh断层东部的全新世地震复发行为符合可变滑动地震模型。加上以前的滑移率研究，东部地区巨大的位移不足表明周围地区发生地震的风险很高；断层有可能引发大于M7.8的地震，或一段聚集的地震活动。位移不足也可能表明，祁连山西部的次断裂在全新世期间吸收了更多的高原横向挤压，这将导致断层滑动率降低，阿尔金塔格断裂的东部扩展或向外扩展减弱。 。

著录项

  • 来源
    《Journal of Asian earth sciences》 |2019年第15期|263-274|共12页
  • 作者

    Luo Hao; Xu Xiwei; Gao Zhanwu; Liu Xiaoli; Yu Hongmei; Wu Xiyan;

  • 作者单位

    China Earthquake Adm, China Earthquake Disaster Prevent Ctr, Beijing 100029, Peoples R China|China Earthquake Adm, Inst Geol, Key Lab Act Tecton & Volcano, Beijing 100029, Peoples R China;

    China Earthquake Adm, Inst Crustal Dynam, 5 Anningzhuang Rd, Beijing 100085, Peoples R China;

    China Earthquake Adm, China Earthquake Disaster Prevent Ctr, Beijing 100029, Peoples R China;

    China Earthquake Adm, Inst Seismol, Key Lab Earthquake Geodesy, Wuhan 430071, Peoples R China;

    China Earthquake Adm, Inst Geol, Key Lab Act Tecton & Volcano, Beijing 100029, Peoples R China;

    China Earthquake Adm, Inst Geol, Key Lab Act Tecton & Volcano, Beijing 100029, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Earthquake rupture; Paleoearthquake; Coseismic displacement; Earthquake recurrence behavior; Altyn Tagh fault;

    机译：地震破裂;古地震;地震位移;地震复发行为;Altyn Tagh断层;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号