气候变化领域集成服务门户(CCPortal): Strain Partitioning and Fault Kinematics in the Northern Qilian Shan (NE Tibet) Determined From Bayesian Inference of Geodetic Data

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DOI	10.1029/2023GL107324
	Strain Partitioning and Fault Kinematics in the Northern Qilian Shan (NE Tibet) Determined From Bayesian Inference of Geodetic Data
	Zhang, Yingfeng; Wimpenny, Sam; Dal Zilio, Luca; Shan, Xinjan
发表日期	2024
ISSN	0094-8276
EISSN	1944-8007
起始页码	51
结束页码	9
卷号	51 期号:9
英文摘要	Oblique convergence across the northern Qilian Shan is accommodated by sub-parallel strike-slip and thrust faults that ruptured simultaneously in the Mw 8 Gulang earthquake in 1927. We investigate the kinematics of fault loading in the northern Qilian Shan and provide insights into the conditions necessary for generating multi-fault earthquakes. We perform Bayesian inversions for the geometry and creep rate on the fault network. We infer that all of the thrust faults are locked north of the Qilian-Haiyuan strike-slip fault and are accumulating elastic strain. Multi-fault earthquakes may occurr in this fault system because the faults are simultaneously loaded by the same source of deformation and are linked together by locked fault segments. The interseismic velocity field alone can not contain the location or activity of individual faults visible in the geomorphology, therefore the short-term geodetic measurements may not reliably indicate the long-term behavior of the fault system. This study aims to understand the earthquake hazard in the northern Qilian region of China. We use measurements of ground deformation between earthquakes to infer how the faults are being loaded in the region. We find that the ground deformation can be explained by a simple model with a single, slowly creeping fault at depth that loads all of the overlying faults. Large earthquakes that were caused by slip on many different faults at the same time have occurred in this region before. We suggest these so-called multi-fault earthquakes may occur because all of the faults are being simultaneously loaded by the same source of stress. Oblique convergence in the northern Qilian Shan is accommodated by sub-parallel thrust and strike-slip faulting The short-term geodetic measurements do not constrain the thrust fault kinematics in the northern Qilian Shan over geological timescales Multi-fault earthquakes may be common in the region as all of the shallow thrust faults are linked together by locked fault segments
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001209653900001
来源期刊	GEOPHYSICAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304693
作者单位	China Earthquake Administration; University of Bristol; Nanyang Technological University; Nanyang Technological University
推荐引用方式 GB/T 7714	Zhang, Yingfeng,Wimpenny, Sam,Dal Zilio, Luca,et al. Strain Partitioning and Fault Kinematics in the Northern Qilian Shan (NE Tibet) Determined From Bayesian Inference of Geodetic Data[J],2024,51(9).
APA	Zhang, Yingfeng,Wimpenny, Sam,Dal Zilio, Luca,&Shan, Xinjan.(2024).Strain Partitioning and Fault Kinematics in the Northern Qilian Shan (NE Tibet) Determined From Bayesian Inference of Geodetic Data.GEOPHYSICAL RESEARCH LETTERS,51(9).
MLA	Zhang, Yingfeng,et al."Strain Partitioning and Fault Kinematics in the Northern Qilian Shan (NE Tibet) Determined From Bayesian Inference of Geodetic Data".GEOPHYSICAL RESEARCH LETTERS 51.9(2024).