A Continuous 13.3-Ka Paleoseismic Record Constrains Major Earthquake Recurrence in the Longmen Shan Collision Zone

Wei Shi; Hanchao Jiang; G. Ian Alsop; Guo Wu

doi:10.3389/feart.2022.838299

A Continuous 13.3-Ka Paleoseismic Record Constrains Major Earthquake Recurrence in the Longmen Shan Collision Zone

Wei Shi, Hanchao Jiang^* (Corresponding Author), G. Ian Alsop, Guo Wu

^*Corresponding author for this work

Geology and Geophysics

China Earthquake Administration

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

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Abstract

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.

Original language	English
Article number	838299
Number of pages	11
Journal	Frontiers in Earth Science
Volume	10
Early online date	9 Mar 2022
DOIs	https://doi.org/10.3389/feart.2022.838299
Publication status	Published - 9 Mar 2022

Bibliographical note

FUNDING
This study is supported by the National Nonprofit Fundamental Research of China Institute of Geology China Earthquake Administration (IGCEA 2126, 1906), the National Natural Science Foundation of China (41572346)

Keywords

soft sediment deformation
selsmites
major earthquake
recurrence time
Longmen Shan fault zone
EASTERN TIBETAN PLATEAU

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10.3389/feart.2022.838299Licence: CC BY

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Copyright © 2022 Shi, Jiang, Alsop and Wu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. https://creativecommons.org/licenses/by/4.0/
Final published version, 2.81 MBLicence: CC BY

Cite this

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title = "A Continuous 13.3-Ka Paleoseismic Record Constrains Major Earthquake Recurrence in the Longmen Shan Collision Zone",

abstract = "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 Mw 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.",

keywords = "soft sediment deformation, selsmites, major earthquake, recurrence time, Longmen Shan fault zone, EASTERN TIBETAN PLATEAU",

author = "Wei Shi and Hanchao Jiang and Alsop, {G. Ian} and Guo Wu",

note = "FUNDING This study is supported by the National Nonprofit Fundamental Research of China Institute of Geology China Earthquake Administration (IGCEA 2126, 1906), the National Natural Science Foundation of China (41572346)",

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AU - Shi, Wei

AU - Jiang, Hanchao

AU - Alsop, G. Ian

AU - Wu, Guo

N1 - FUNDING This study is supported by the National Nonprofit Fundamental Research of China Institute of Geology China Earthquake Administration (IGCEA 2126, 1906), the National Natural Science Foundation of China (41572346)

PY - 2022/3/9

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N2 - 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 Mw 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.

AB - 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 Mw 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.

KW - soft sediment deformation

KW - selsmites

KW - major earthquake

KW - recurrence time

KW - Longmen Shan fault zone

KW - EASTERN TIBETAN PLATEAU

U2 - 10.3389/feart.2022.838299

DO - 10.3389/feart.2022.838299

M3 - Article

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VL - 10

JO - Frontiers in Earth Science

JF - Frontiers in Earth Science

M1 - 838299

ER -

A Continuous 13.3-Ka Paleoseismic Record Constrains Major Earthquake Recurrence in the Longmen Shan Collision Zone

Abstract

Bibliographical note

Keywords

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