Present-day Crustal Movement and Strain Rate in Guangxi Area from GPS Data

doi:10.11947/j.AGCS.2015.20130566

Abstract

Abstract: The 3D crustal movement velocities filed and strain parameters of Guangxi area are acquired in the coordinate frame of ITRF2005 with the multi-period GPS data from 1998 to 2010 analyzed by using GAMIT/GLOBK software, and the area deformation field and present-day construction mechanism are also discussed in this paper. From the GPS monitoring results, the crustal movement of Guangxi area coincides with south China movement in the South-East-East anticlockwise direction, the average vertical velocity value is 33.49 mm/a in ITRF2005 frame, the preponderant direction is N 109.3° E, the average horizon velocity value is +1.30 mm/a, and the trend becomes increasing from East to West of Guangxi province. The present-day strain status is extrusion in N 127.3°±4.8° E direction, the main maximum extrusion strain is -2.7±0.5×10^-9/a with a tension effect in the N 37.3°±4.8° E direction, and the main maximum tension strain is 1.8±0.2×10^-9/a. A more precise 3D present-day crustal velocity filed of Guangxi area is presented in this paper with the full analyzing of GPS data.

Key words: GPS, crustal movement, velocity filed, strain parameters

CLC Number:

P227

LIAO Chaoming, MA Yan, PAN Yuanjin, HUANG Xiangxiong. Present-day Crustal Movement and Strain Rate in Guangxi Area from GPS Data[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(8): 858-865.

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