Geometry, Kinematics and Regional Tectonic Significance of the Huahai Fault in the Western Hexi Corridor, NW China

被引：0

作者：

Yun L. ^{[1
]}

Zhang J. ^{[2
]}

Xu W. ^{[3
]}

Liu Z. ^{[3
]}

Zhang J. ^{[2
]}

Zhao H. ^{[2
]}

Zhang B. ^{[2
]}

机构：

[1] Key Laboratory on Geological Disposal of High-Level Radioactive Waste, Beijing Research Institute of Uranium Geology, CNNC, Beijing

[2] Institute of Geology, Chinese Academy of Geological Science, Beijing

[3] China Earthquake Disaster Prevention Center, Beijing

来源：

Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2021年 / 46卷 / 01期

关键词：

Cenozoic; activity history; Huahai fault; Qinghai-Tibetan Plateau; Tectonics; Western Hexi corridor;

D O I：

10.3799/dqkx.2019.227

中图分类号：

学科分类号：

摘要：

The NNW-SSE striking Huahai fault develops in the Huahai Basin in the western Hexi corridor. Its spatial distribution, kinematics and activity are significance for understanding the tectonic deformation and outgrowth of the northern margin of the Qinghai-Tibet Plateau. Based on the interpretation of satellite images, field surveying, trenching, optical luminescence dating and existing geophysical data, the characteristics of Huahai fault are reported. A landform scarp develops along the Huahai fault, which is approximate 8 km long from Shuangquanzi, Daquan to Xiaoquan. This scarp is caused by the fault related folding. The fault extends southward to the northern Kuantanshan and Heishan ranges indicated by scarps, springs and landforms. The Huahai fault was once a normal fault in the Early Cretaceous, and was inversed to be a thrust fault in the Late Cretaceous. During the Cenozoic, the northward growth of the Qinghai-Tibetan Plateau resulted in development of a series of sinistrally transpressive faults such as the Sanweishan, Ganxiashan, Kuantanshan and Taerwan-Dengdengshan-Chijiaoziwo faults. These faults are boundaries of blocks between the Sanweishan and Altyn Tagh faults, and cause the uplift of the mountain ranges along faults, and the northeastward movement of blocks among faults. The thrusting of the Huahai fault is the response of this recent tectonic event. © 2021, Editorial Department of Earth Science. All right reserved.

引用

页码：259 / 271

页数：12

共 39 条

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