J4 ›› 2010, Vol. 40 ›› Issue (6): 1496-1502.

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Present-Day Movement of Bangong Co-Nujiang Suture Zone,Tibetan Plateau, Inferred from GPS Measurements

XIAO Gen-ru1,2, GAN Wei-jun1| CHEN Wei-tao1| CHENG Jia3   

  1. 1. Institute of Geology/State Key Laboratory of Earthquake Dynamics, China Earthquake Administration, Beijing 100029, China ;
    2. School of Surveying and Mapping, East China Institute of Technology, Fuzhou, Jiangxi 344000, China;
    3. China Earthquake Network Center, Beijing 100045, China
  • Received:2010-04-08 Online:2010-11-26 Published:2010-11-26

Abstract:

Based on the measurements of a GPS profile, which is composed of 10 GPS stations across the Bangong Co-Nujiang suture zone around Gaize area of the Tibetan Plateau, observed 3 times from 2007 to 2009 in campaign mode, we investigated the present-day crustal deformation of the Gaize area, and revealed that the principal strains of the region are north-south compression and east-west extension with the rates of (104.0±28.6) ×10-9/a and (25.4±17.7) ×10-9/a, respectively. Using the half-space elastic dislocation model and constrained with the GPS velocity vectors of the GPS profile, we inversed the present-day movement of the Bangong Co-Nujiang suture zone at Gaize area (known as Gaize-Dongcuo fault) is right-lateral with a rate of about (7.4±0.8) mm/a.

Key words: Bangong Co-Nujiang suture zone, GPS, crustal deformation, movement rate

CLC Number: 

  • TP79
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