• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geodinamica Acta >Late Quaternary episodic displacement on a sackung scarp in the central Spanish Pyrenees. Secondary paleoseismic evidence?
【24h】

Late Quaternary episodic displacement on a sackung scarp in the central Spanish Pyrenees. Secondary paleoseismic evidence?

机译：西班牙比利牛斯山脉中部的一个山坡陡坡上第四纪晚期的偶发位移。次生古地震证据？

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

A sackung scarp has been investigated by trenching in the central Spanish Pyrenees. This feature is located 18 km to the SW of the North Maladeta Fault, which is the most probable source of the M-w 5.3 Vielha earthquake of 1923. Three displacement events have been inferred for the trenched sackung based on colluvial wedge stratigraphy and fault truncation. The increasing amount of deformation in each successive faulting event may be related to the progressive weakening of the slope through time. A minimum vertical slip rate of 0.19 mm/yr has been calculated for the sackung scarp. Several arguments suggest that the episodic displacement of the analysed sackung is controlled by strong seismic shaking: (a) Spatial association of the sackung features with the North Maladeta Fau (b) Episodic displacement with a millennial recurrence (5.6 kyr) consistent with the expectable earthquake recurrence interval for a low slip rate fault, like the neighbouring North Maladeta Fault. Demonstrating ill future investigations that the sackung features in the area constitute archives of large paleoearthquakes Would be of great interest for seismic hazard assessments. They might help to improve the catalogue of paleoearthquakes and might provide information oil earthquake reccurrence intervals and the age of the most recent event (MIZE). (C) 2008 Lavoisier SAS. All rights reserved
机译：已经通过在西班牙比利牛斯山脉中部挖沟调查了一种袋袋陡崖。该特征距北马拉德塔断裂的西南部18公里，北马拉德塔断裂是1923年5.3级维耶哈地震最可能的源头。基于山坡楔形地层学和断层截断，推测了开槽凹坑的三个位移事件。在每个连续断层事件中变形量的增加可能与坡度随时间的逐渐减弱有关。计算出袋装陡崖的最小垂直滑移率为0.19 mm / yr。有几个论点表明，被分析的萨克顿的偶发位移受强烈的地震震动控制：（a）萨克顿特征与北马拉德塔断裂的空间联系; （b）千禧年复发（5.6年）的偶发位移与低滑动率断层（如邻近的北马拉德塔断层）的预期地震复发间隔一致。未来的调查表明该地区的袋囊特征构成了大型古地震的档案，这在地震危险性评估中将引起极大的兴趣。它们可能有助于改善古地震的目录，并可能提供有关石油地震复发间隔和最新事件的年龄（MIZE）的信息。 （C）2008 Lavoisier SAS。版权所有

著录项

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