红河断裂与金沙江断裂的GPS监测研究

采用中国地壳运动观测网络的观测数据,计算出了红河断裂两侧、金沙江断裂两侧所选测站在欧亚参考框架下的水平运动速度;用最小二乘法求得红河断裂的运动速率为2.02mm/a,运动方向为南偏东76°,表明红河断裂现今活动性较小,把红河断裂的运动速度分解在红河断裂的走向和倾向上,推出红河断裂的性质为右旋走滑,且有一定的拉张特征;用最小二乘法求得金沙江断裂的运动速率为2.49 mm/a,运动方向为正东,表明金沙江断裂现今活动性较小,把金沙江断裂的运动速度分解在金沙江断裂的走向和倾向上,推出金沙江断裂几乎没有走滑,但有一定的拉张特征。

The Research on GPS Monitoring of Honghe Fault and Jinshajiang Fault

Adopting the observational data of the Crastal Movement Observation Network of China（CMONOC）,this paper calculates the horizontal movement velocity on the Eurasian reference frame of the selected stations of the CMONOC in the both sides of Honghe Fault and Jinshajiang Fault;by using the least square method,obtains that the movement velocity of Honghe Fault is 2.02 mm/a and the movement direction of Honghe Fault is S 76° E,indicating that the current activity of Honghe Fault is less,and decompounding the movement velocity of Honghe Fault in trend and tendency of Honghe Fault can infer that Honghe Fault is a right-lateral strike-slip fault and has the certain tension characteristics;and by using the least square method,obtains that the movement velocity of Jinshajiang Fault is 2.49 mm/a and the movement direction of Jinshajiang Fault is E,indicating that the current activity of Jinshajiang Fault is less,and decompounding the movement velocity of Jinshajiang Fault in trend and tendency of Jinshajiang Fault can infer that the Jinshajiang Fault has no strike-slip,but has the certain tension characteristics.