鲜水河断裂带间震期断层滑动与转动特征研究

构建描述断层平动和转动的向-位错模型，利用2001~2004 年的GPS数据，采用粒子群算法反演鲜水河断裂带不同分段处的断层滑动和转动情况，最后由正演计算验证反演断层参数的可靠性。结果表明：1）鲜水河断裂带断层活动以滑动特性为主，整体呈左旋走滑运动，局部兼有挤压；2）鲜水河断裂带转动特征分段性较为明显，北西段和南东段的断层转动特征较强，且南东段断层转动最为显著。

Research on Slip and Rotational Characteristics of Xianshuihe Fault Zone during the Earthquake Period

For the purpose of detailed study of the Xianshuihe fault activity, the disclination-dislocation model is put forward in this paper. This model combines GPS data in the area of 2001-2004 with article swarm optimization to inter-fault sliding and rotation at different segments of the fault zone.Wethen verify the reliability of fault parameters based on forward calculation. Our results show: 1) The Xianshuihe fault zone, which presents left-lateral strike-slip movement on the whole and extrusion on the local scale, gives priority to sliding characteristics; 2) The Xianshuihe fault zone presents more rotation characteristics in the southeast segment than in the northwest segment.