,Main active faults and seismic activity along the Yangtze River Economic Belt: Based on remote sens

• 作 者: Zhong-hai Wu Chun-jing Zhou Xiao-long Huang Gen-mo Zhao Cheng-xuan Tan
• 机 构: Department of Neotectonics and Active Tectonics, Institute of Geomechanics, Chinese Academy of Geolo
• 出 处: 中国地质（英文）
• 发表日期: 2020年2期
• 关键词: Active faults and tectonic system Paleo-earthquake Regional crustal stability Se

The Yangtze River Economic Belt (YREB) spans three terrain steps in China and features diverse topography that is characterized by significant differences in geological structure and presentday crustal deformation.Active faults and seismic activity are important geological factors for the planning and development of the YREB.In this paper,the spatial distribution and activity of 165 active faults that exist along the YREB have been compiled from previous findings,using both remote-sensing data and geological survey results.The crustal stability of seven particularly noteworthy typical active fault zones and their potential effects on the crustal stability of the urban agglomerations are analyzed.The main active fault zones in the weste YREB,together with the neighboring regional active faults,make up an arc fault block region comprising primarily of Sichuan-Yunnan and a "Sichuan-Yunnan arc rotational-shear active tectonic system" strong deformation region that features rotation,shear and extensional deformation.The active faults in the central-eastem YREB,with seven NE-NNE and seven NW-NWW active faults (the "7-longitudinal,7-horizontal " patte),macroscopically make up a "chessboard tectonic system" medium-weak deformation region in the geomechanical tectonic system.They are also the main geological constraints for the crustal stability of the YREB.