巴颜喀拉地块内部五道梁-长沙贡玛断裂晚第四纪活动速率

doi:10.3799/dqkx.2026.156

巴颜喀拉地块内部五道梁-长沙贡玛断裂晚第四纪活动速率

doi: 10.3799/dqkx.2026.156

1. 中国地震局地质研究所, 地震动力学与强震预测全国重点实验室, 北京 100029

基金项目:

国家重点研发计划资助(项目编号:2023YFC3012001-4)。

详细信息

作者简介:
王越(2000-),男,硕士研究生,主要从事活动构造与地震地质研究。Email:wangyue@ies.ac.cn,ORCID:0009-0004-3584-119X

通讯作者:
李安(1983-),男,博士,研究员,主要从事活动断层和地震地质研究。Email:lian@ies.ac.cn,ORCID:0000-0001-9843-8059

中图分类号: P65
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出版历程
- 收稿日期: 2026-01-23
- 网络出版日期: 2026-06-29

Late Quaternary Slip Rate of the Middle Segment of Wudaoliang-Changshagongma Fault Inside the Bayan Har Block

1. State Key Laboratory of Earthquake Dynamics and Forecasting, Institute of Geology, China Earthquake Administration, Beijing 100029, China

摘要

摘要: 五道梁-长沙贡玛断裂是巴颜喀拉地块内部NW向大型走滑断裂之一，已有研究表明其中段为全新世活动断裂并发生过多次古地震，获得其晚第四纪以来的变形速率，对了解巴颜喀拉地块内部变形分配和强震风险具有重要意义。本文结合高分辨率影像解译、地震地质野外考察、无人机摄影测绘、光释光定年等方法对断裂中段开展了精细研究，获得中段的空间展布和多个位错量，结合阶地沉积物的定年，获得断裂中段晚第四纪左旋走滑速率为1.8±0.2mm/a。变形速率与地块内部的其他断裂基本相当，明显低于地块边界断层。但内部断裂长期持续活动表明，除边界断裂带外地块内部也承担了一部分地壳形变，且具备发生7级左右地震的能力，因此内部断裂的地震危险性仍需持续关注。
- 青藏高原 /
- 巴颜喀拉地块 /
- 五道梁-长沙贡玛断裂 /
- 晚第四纪活动速率
Abstract: The Wudaoliang-Changshagongma fault is one of the large-scale NW-trending strike-slip faults inside the Bayan Har block. Previous studies have indicated that the middle segment of this fault is an active fault since the Holocene and has occurred multiple paleoearthquakes. Determining the rate of deformation since the Late Quaternary is of great significance for understanding the distribution of deformation inside the Bayan Har block and the seismic risk associated with it. This paper combines high-resolution image interpretation, unmanned aerial vehicle (UAV) photogrammetry, and optically stimulated luminescence(OSL) dating techniques to conduct a detailed study of the middle segment of this fault. As a result, the spatial distribution of this segment of the fault, as well as several cross-fault rivers' terrace displacement, were determined. By combining the dating results of the terrace sediments, it was concluded that the left-lateral strike-slip rate of this fault since the late Quaternary was 1.8±0.2 mm/a. This rate of deformation is roughly comparable to that of other faults inside the Bayan Har block, but it is significantly lower than the activity rates of other faults at the boundaries of Bayan Har block. Nevertheless, the long-term continuous activity of these internal faults indicates that, in addition to the boundary fault zones, the interior of the block also contributes to crustal deformation and has the potential to generate earthquakes of magnitude 7 or higher. Therefore, the seismic hazard posed by these internal faults continues to require attention.
- Tibet Plateau /
- the Bayan Har block /
- the Wudaoliang-Changshagongma Fault /
- the slip rate since the Late Quaternary

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参考文献(56)

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巴颜喀拉地块内部五道梁-长沙贡玛断裂晚第四纪活动速率

doi: 10.3799/dqkx.2026.156

作者简介:
王越(2000-),男,硕士研究生,主要从事活动构造与地震地质研究。Email:wangyue@ies.ac.cn,ORCID:0009-0004-3584-119X

通讯作者:
李安(1983-),男,博士,研究员,主要从事活动断层和地震地质研究。Email:lian@ies.ac.cn,ORCID:0000-0001-9843-8059

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Late Quaternary Slip Rate of the Middle Segment of Wudaoliang-Changshagongma Fault Inside the Bayan Har Block

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巴颜喀拉地块内部五道梁-长沙贡玛断裂晚第四纪活动速率

doi: 10.3799/dqkx.2026.156

作者简介: 王越(2000-),男,硕士研究生,主要从事活动构造与地震地质研究。Email:wangyue@ies.ac.cn,ORCID:0009-0004-3584-119X

通讯作者: 李安(1983-),男,博士,研究员,主要从事活动断层和地震地质研究。Email:lian@ies.ac.cn,ORCID:0000-0001-9843-8059

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Late Quaternary Slip Rate of the Middle Segment of Wudaoliang-Changshagongma Fault Inside the Bayan Har Block

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出版历程

目录

作者简介:
王越(2000-),男,硕士研究生,主要从事活动构造与地震地质研究。Email:wangyue@ies.ac.cn,ORCID:0009-0004-3584-119X

通讯作者:
李安(1983-),男,博士,研究员,主要从事活动断层和地震地质研究。Email:lian@ies.ac.cn,ORCID:0000-0001-9843-8059