利用远震接收函数反演山西地区台站下方的地壳厚度及泊松比  

Study of Crustal Thickness and Poisson's Ratio Distribution Beneath Seismic Stations in Shanxi Province by Teleseismic Receiver Function

作　　者：吕睿[1,2] 宫猛[3] 孟小琴[1,2] 董春丽[1,2] 刘素珍[1,2] 

机构地区：[1]山西省地震局,太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,太原030025 [3]河北省地震局,石家庄050021

出　　处：《华北地震科学》2016年第1期59-64,共6页North China Earthquake Sciences

基　　金：中国地震局地震监测、预测、科研三结合课题(150404);山西省地震局地震科研基金项目(SBK-1506)

摘　　要：利用2008—2013年山西数字地震台网远震宽频带记录波形资料,运用H-Kappa叠加方法得到各台站下方的地壳厚度和波速比。研究结果表明,山西地区地壳厚度存在明显的差异。研究区内地壳平均厚度约39km,南北地壳厚度变化幅度较大,其中SHZ（上皇庄台）地壳厚度最大为43km,ANZ（安泽台）地壳厚度最小为36km,南北两端差异达7km。泊松比值在0.24~0.31之间变化,与全球的泊松比估计值相当。山西的地壳厚度与地表地形存在着明显正相关,而地壳厚度和泊松比则呈现负相关的关系。Receiver functions are calculated by using teleseismic records of Shanxi Digital Seismic Network and crustal thickness and Poisson＇s Ratio in Shanxi area are obtained by stacking receiver functions with HKappa technique.The result shows that crustal thickness in Shanxi province exists obvious difference.The average crustal thickness in Shanxi is about 39 km.The difference of crustal thickness between south part and north part has a higher value.The crust beneath ANZ（Anze）station is the thinnest（36km）,biggest thickness（43km）appears beneath SHZ station.Poisson ratio in Shanxi Province is about 0.24-0.31,which is consistent with the Poisson＇s ratio of the world.The crustal thickness of Shanxi area is positively correlated to the topography.Meanwhile,the crustal thickness of Shanxi area is negatively correlated to Poisson＇s ratio.

关 键 词：山西地区 接收函数 地壳厚度 泊松比 

分 类 号：P315.2[天文地球—地震学]