Study on Crustal Velocity Field Model of CORS Network in Sichuan
Abstract In this paper, GAMIT/GLOBK is used to solve the data of 50 CORS stations covering Sichuan province from 2006 to 2015, and the time series is extracted and the velocity field model is obtained. The results show that the average velocity of CORS stations in Sichuan is 38.72 mm/a, and the advantage direction of velocity field is S73.9°E. The average velocity in the horizontal direction of Eurasia is 14.40 mm/a, the dominant direction is S77.78°E, which is 24.32 mm/a lower than the ITRF2008 frame. The average speed in the vertical direction is 3.43 mm/a, the whole is uplifted, and a small part located in the east plains of the station are in a downward trend, probably due to groundwater or excessive logging of natural resources such as coal mines and oil. The maximum principal strain rate is 7.31×10-11 /a and the minimum principal strain rate is -5.4×10-11/a. The regional crustal surface expansion and maximum shear strain rate are distributed in the southwest near the three fault zones.
Key words :
velocity field
strain field
SCCORS
ITRF2008
Eurasian framework
Cite this article:
TANG Weiyao,SHI Yueling,DING Yihang. Study on Crustal Velocity Field Model of CORS Network in Sichuan[J]. jgg, 2018, 38(5): 464-468.
TANG Weiyao,SHI Yueling,DING Yihang. Study on Crustal Velocity Field Model of CORS Network in Sichuan[J]. jgg, 2018, 38(5): 464-468.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2018/V38/I5/464
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