Knickpoint series of gullies along the Luoyunshan Piedmont and its relation with fault activity since late Pleistocene
Knickpoint series of gullies along the Luoyunshan Piedmont and its relation with fault activity since late Pleistocene
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晚更新世以来落云山山前沟壑系列及其与断层活动的关系
DOI：
10.1016/j.geomorph.2016.06.026
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发表时间：
2016-09
期刊：
影响因子：
3.9
通讯作者：
Kuan Liang
中科院分区：
文献类型：
--
作者：
Changbin Sun;Tianfeng Wan;Xinsheng Xie;Xiaoming Shen;Kuan Liang
利用差分GPS和典型阶地沉积物测年技术，对罗云山皮埃蒙特断裂带上的28条沟谷纵剖面进行了测量，获得了罗云山皮埃蒙特沿着的6级断点序列。作者将其与前人对海沟揭示的LPF古地震的研究进行了比较，发现从断层的发生时间和垂直位移来看，缺口点和海沟研究的古地震事件具有很好的一致性。这说明利用断点序列研究该断裂带的古地震事件是可行的。最后，作者建立了一个较完整的LPF古地震序列，大约28，000年前，低通带发生了6次古地震事件，低通带具有准周期复发的特征，平均复发间隔为4585年。古地震事件的垂直位移为2.4- 3.0m，根据同震位移与震级的经验关系式，其震级为Ms 7.0 ~ 7.5。本研究旨在补充和完善传统的探槽方法，为活动构造研究提供理论和方法支持，为吕梁人口密集地区的地震危险性评价提供重要信息。
The authors surveyed the longitudinal profiles of 28 gullies across the Luoyunshan Piedmont fault (LPF) by differential GPS and dating of sediments well preserved in the typical terraces and obtained 6-level knickpoint series of the gullies along the Luoyunshan Piedmont. The authors compared it with previous studies on the paleo-earthquakes of the LPF revealed by trenches and found that the paleo-earthquake events from knickpoint and trench studies are in good agreement in terms of the time of occurrence and vertical displacement of the fault. It shows studying the paleo-earthquake events of the fault by knickpoint series is feasible. At last, the authors established a more complete paleo-earthquake sequence of the LPF supported by geomorphologic and sedimentary evidence, i.e., six paleo-earthquake events happened on the LPF from about 28,000 years ago; the LPF has the characteristic of quasi-periodic recurrence and the average recurrence interval is 4585 years. The vertical displacement of the paleo-earthquake events is 2.4–3.0 m; according to the empirical equations between co-seismic displacement and earthquake magnitude the magnitude of these events is Ms 7.0–7.5. This study aims to complement and improve the traditional trenching method, provide theoretical and methodological support for the research of active tectonics, and contribute important information for the seismic hazard assessment of the densely populated Linfen area.
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DOI：
10.1086/629519
发表时间：
1991-07
期刊：
The Journal of Geology
影响因子：
--
作者：
Jerry R. Miller
通讯作者：
Jerry R. Miller
影响因子：
2.9
作者：
Xi-wei Xu;Xing‐Da Ma;Q. Deng
通讯作者：
Xi-wei Xu;Xing‐Da Ma;Q. Deng
影响因子：
4.9
作者：
P. Lonsdale;J. Hawkins
通讯作者：
P. Lonsdale;J. Hawkins
影响因子：
3
作者：
Zhongtai He;Baoqi Ma
通讯作者：
Zhongtai He;Baoqi Ma
DOI：
10.1016/s0303-2434(99)85028-4
发表时间：
1999
影响因子：
7.5
作者：
George Philip;M. P. Sah
通讯作者：
George Philip;M. P. Sah