现实中存在许多人为制造或自然形成的微地形,以其为单位的应变分布与其所在板块的整体应变分布具有差异,本研究选取地壳活动相对活跃的腾冲市和顺镇区域作为试验区,实验表明已有的整体旋转与线性应变模型(Rotation in the Entire Block and Linear Strain Mode,RELSM)在描述板块内部局部微地形应变时表现不佳;为精细刻画板内应变,在已有的RELSM模型基础上,通过引入地形因素,并联合GNSS、InSAR数据,通过改进型粒子群算法反演板内局部区域应变场参数,为局部区域精细化的地壳活动性评估提供帮助.
Research on strain inversion in local areas within plates:taking Heshun Town as an example
In reality,there are many artificially created or naturally formed microtopography,and the strain distribution in units of them differs from the overall strain distribution of the plate they are located in.This study selected the Heshun Town area in Tengchong City,which was relatively active in crustal activity,as the experimental area.The experiment showed that the existing overall Rotation in the Entire Bock and Linear Strain Mode(RELSM)did not perform well in describing local microtopography strains within the plate;To accurately characterize the strain inside the plate,based on the existing RELSM model,terrain factors are introduced and combined with GNSS and InSAR data.The improved particle swarm optimization algorithm is used to invert the local strain field parameters inside the plate,providing assistance for the refined evaluation of crustal activity in local areas.
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