期刊
FRONTIERS IN EARTH SCIENCE
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/feart.2022.838299
关键词
soft sediment deformation; seismites; major earthquake recurrence time; Longmen Shan fault zone; eastern Tibetan Plateau
资金
- National Nonprofit Fundamental Research of China Institute of Geology China Earthquake Administration [IGCEA 2126, 1906]
- National Natural Science Foundation of China [41572346]
Thrust collision zones with low slip rates along the plate boundary are significant areas of stress accumulation and prone to develop more destructive earthquakes with longer recurrence intervals. This study provides a continuous seismic record in the Longmen Shan thrust fault zone based on detailed investigation of sediment deformation structures. The recurrence time of large earthquakes is shorter than previous estimates, and earthquake recurrence in the warm period is more frequent.
Thrust collision zones with low slip rates along the plate boundary are significant areas of stress accumulation and prone to develop more destructive earthquakes with longer recurrence intervals. Such regions are often classified as low seismic risk if they lack continuous records of large earthquakes, such as the eastern Tibetan Plateau before the 2008 M-w 7.9 Wenchuan earthquake. Here, we provide a continuous seismic record in the Longmen Shan thrust fault zone spanning 13,000 years based on detailed investigation of the soft-sediment deformation structures and seismites in the Lixian lacustrine sequence. The recurrence time of large earthquakes (M >= 8.1) is 1,200 years, which is significantly shorter than the previous estimate of 2,000-6,000 years. The Maoxian-Wenchuan fault is the main fault that triggered the deformation in the Lixian lacustrine sediments. In addition, earthquake recurrence in the warm period is more frequent than that in the cold period, which should arouse our attention for the seismic study of tectonically active regions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据