Recent Crustal Movement Characteristics of Xiaojiang River Fault Based on the GPS Data

详细信息   

• 责任者：Shi Faqi (Earthquake Administration of Yunnan Province ; Kunming 430071 ; China) ; You Wei
• 刊名：Journal of Seismological Research
• 出版年：2012
• 卷期：35(2)
• 关键词：全球定位系统 ; Global Positioning System ; 走滑断层 ; strike-slip faults ; 云南 ; Yunnan Province
• 页码：p.207-212
• 图表：3 illus., 2 tables, 3 refs.
• 分类号：0300
• issnNo：ISSN1000-0666
• isbnNo：CN53-1062/P

摘要

Using GPS observation data of five periods recorded in the crustal movement observation network of China from 1999 to 2009,  the authors selected the regional gravity center as reference datum to study the recent crustal movement characteristics of Xiaojiang River Fault and its segmentation motion characteristics from geodetic deformation survey aspect. The results showed that the movement of Xiaojiang Fault featured characteristics of left lateral strike slip and tensionshear, and these characteristics was the same before and after Wenchuan M8.0 earthquake, which showed that the Wenchuan earthquake had no influence on the total movement of Xiaojiang River Fault. Using GPS data from 2007 to 2009, the authors obtained the average slip rate was 4.75 mm/a and the average tensionshear was 0. 65 mm/a in the northern section of the Xiaojiang River Fault. In the middle section of it, the average slip rate was 5.55 mm/a and the average tensionshear was 1.55 mm/a. In the southern section of it, the average slip rate was 4. 72 mm/a and the average tensionshear rate was 3.2 mm/a.