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利用川滇地区 1998～ 2 0 0 2年间 2 0 0多GPS点位的多期复测结果 ,将川滇地区分为 9个次级活动块体 ,计算了各个活动块体的欧拉旋转矢量和主要活动断裂的运动速度 ,并分析了该地区的应变场特征 .结果表明 ,川滇地区的地壳运动速度具有北强南弱、西强东弱、以菱形块体为主顺时针旋转的特征 ;菱形块体外各个块体运动速度大幅衰减 ;与地质结果的差异表明 ,川滇菱形块体的现今地壳运动由北往南逐渐增强 ;青藏高原物质的侧东向挤出在滇中块体南部明显下降 ,而丽江—小金河断裂带的吸收作用并不明显 ;川滇地区以压应变为主 ,四川石棉和云南新平一带出现的应变集中地区也许具有发生中强地震的可能性 .
Based on the multi-period retest results of more than 200 GPS stations in Sichuan and Yunnan provinces from 1998 to 2002, the nine sub-active blocks are divided into nine sub-active blocks in Sichuan-Yunnan region. The Euler rotation vectors of each active block are calculated And the movement velocity of main active faults, and analyzed the characteristics of the strain field in this area.The results show that the crustal movement velocity in Sichuan-Yunnan region is characterized by weak north and south, weak strong in the west and weak in the clockwise direction ; The movement velocity of each block outside the diamond block greatly declines; the difference with the geological result shows that the current crustal movement of the Sichuan-Yunnan diamond block gradually increases from north to south; the lateral east-facing extrusion of the Tibetan Plateau material is located in the south of the middle Yunnan block However, the absorption of Lijiang-Xiaoganhe fault zone is not obvious. The compressive strain is dominant in Sichuan-Yunnan region, and the stress-concentrated areas in Sichuan asbestos and Xinping area of Yunnan may have the possibility of occurrence of moderate-strong earthquakes.