【摘要】 利用重庆及其邻区的34个宽频带地震台站接收到的2 040个远震P波波形,计算其接收函数,运用以Hk扫描为主并辅之以转换相到时读取的方法,计算出这34个台站下方的莫霍面深度及波速比;再通过波速比计算其泊松比。计算表明:研究区莫霍面深度范围在40~56 km之间,变化总体相对平缓,呈现"北深南浅"的趋势;泊松比分布在0.28~0.30之间。最后讨论了H-k扫描方法与读取转换震相到时两种方法的优劣。更多还原

【Abstract】 Firstly,w e computed the receiver function of 2040 teleseismic P-w ave w aveforms w hich w ere received by34 broadband seismic stations located in Chongqing and its adjacent area. Secondly,w e obtained the Moho depths and w ave velocity ratios under 34 seismic stations by the H-k scanning technology,and aided by the time delays reading of converted phase,then computed Poisson’ ratios by use of w ave velocity ratios. The results show that the overall trend of Moho depths variation beneath Chongqing is relatively smooth,increasing gradually from 40 km to 56 km from south to north,and the corresponding Poisson’ rate is from 0. 28 to 0. 30. At last,w e discussed the good and bad betw een the H-k scanning technology and the time delays reading of converted phase.更多还原