Analysis of the crustal movement characteristics and uplift mechanism of Longgang volcanoes, Jilin, based on geodesy and MT technology

• Published in: 地球与行星物理论评 Vol. 54; no. 6; pp. 633 - 642
• Main Authors: Yaxuan Hu, Lingqiang Zhao, Wenquan Zhuang, Guojing Liang, Wei Qi
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Reviews of Geophysics and Planetary Physics 01.11.2023
• Subjects: earthquake; horizontal movement; mt; surface expansion rate; uplift mechanism; vertical movement
• ISSN: 2097-1893
• DOI: 10.19975/j.dqyxx.2022-069

The Longgang volcanic field is one of the most active volcanoes in modern China. It is situated in the central region of the Longgang mountains on the west slopes of Changbaishan in Jilin. The present three-dimensional crustal movement velocity fields in the different periods were obtained by processing Global Navigation Satellite System (GNSS) observations from 2010 to 2020 and data for the leveling profiles from 1970s to 2010s in the area. The horizontal velocities of GNSS stations were larger in the eastern region than in the western regions, indicating that the eastern region is mainly tensile. The results of the continuous surface strain rates showed that a volcanic field is located in the expansion area. The results of the first-order leveling data for the Changfu profile and the Danfu profile showed that the vertical movements were predominantly uplift, with rates of 0.55~1.83 mm/a for most of the sites. The area with relatively higher uplifting rates of more than 1.0 mm/a was Fusong-Xianrenqiao-Laosha