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Crustal structure in the anyuan coal mine and its adjacent areas of Jiangxi Province by P-wave receiver functions

Earthquake Research Advances 2024年第1期4卷 47-58页

作者： Xingmian Zhang Meng Gong Jian Lü Hongxing Li Jie Hu Junwen He Jianhua Peng Bingyue Liu State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang330013China Nanchang Key Laboratory of Intelligent Sensing Technology and Instruments for Geological Hazards East China University of TechnologyNanchang330013China Jiangxi Earthquake Agency Nanchang330026China East China University of Technology School of Geophysics and Measurement-Control TechnologyNanchang330013China Hunan Earthquake Agency Changsha410004China

We collected high-quality teleseismic events recorded by 12 broadband seismographs deployed in the anyuan coal mine and its adjacent areas in Pingxiang City,Jiangxi Province for nearly two *** H-κ-c stacking method was employed to obtain the crustal thickness and Poisson's ratio distribution,then the characteristics of crustal structure below the stations were obtained by using the time-domain linear inversion *** crustal thickness in the anyuan coal mine and its adjacent areas ranges from approximately 32~35 km,with an average thickness of 33 km,which is consistent with the crustal thickness results in South China from previous studies using the receiver function *** average Poisson's ratio of the crustal bulk composition in the study area varies between 0.22 and 0.25,which is lower than the global value with a 0.27 average,indicating a predominantly intermediate-acidic or felsic crustal *** is a weak negative correlation between Poisson's ratio and crustal thickness estimates in the anyuan coal mine and its adjacent areas,suggesting that the absence of mafic-ultramafic materials in the lower crust is associated with the process of crustal *** velocity inversion results indicate that the crustal structure including three velocity discontinuity interfaces,with the first at a depth of approximately 1.5 km,the second at about 10~15 km,and the third being the *** study also indicates that the results obtained by the H-κ-c stacking method are significantly better than those obtained by the H-κmethod,effectively reducing the standard deviation and dispersion of crustal thickness and vP/vSratio.

关键词： anyuan coal mine Receiver function H-κ-c stacking Crustal thickness Poisson's ratio

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