利用GPS资料反演祁连山断层的三维滑动速率

INVERSION OF 3-D SLIP VELOCITY OF QILIANSHAN FAULT WITH GPS DATA

以位错理论模型为基础，导出了利用GPS观测的水平位移场速率数据反演断层的走滑、倾滑和张开三维运动速率分布的最佳估计反演计算公式，并利用青藏高原东北缘1999～2001年间GPS观测的位移场速率对祁连山断裂的三维运动速率分布进行了反演计算研究。结果表明，祁连山断裂活动速率在断层倾滑方向上明显大于走滑方向和张开方向，而且具有空间分布的不均匀性特征。

On the basis of dislocation model, to computed formulae inversing three-dimension velocity of fault＇s strike-slip,dip and tension with GPS observation data are derived. The velocity distribution of Qilianshan fault are calculated with GPS data observed from 1999 to 2001 in northerneast margin of Tibetan Plateau. The results show that the velocity in dip slip of Qilianshan fault is larger than those in strike slip and tension, and the distribution of velocities along the fault are uneven.