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[1]LI Qidong,XIE Zhuojuan.Study of the Crustal Thickness and Poisson's Ratio in Guangdong with Receiver Function Method[J].Journal of Seismological Research,2024,47(02):212-222.[doi:10.20015/j.cnki.ISSN1000-0666.2024.0020 ]

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Study of the Crustal Thickness and Poisson's Ratio in Guangdong with Receiver Function Method

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 47 Number of periods: 2024 02 Page number: 212-222 Column: Public date: 2023-12-01

Title:: Study of the Crustal Thickness and Poisson's Ratio in Guangdong with Receiver Function Method

Author(s):: LI Qidong¹; 2; XIE Zhuojuan¹; 2; (1.National Institute of Natural Hazards,Ministry of Emergency Management of China,Beijing 100085,China)(2.Key Laboratory of Compound and Chained Natural Hazards Dynamics,Ministry of Emergency Management of China,Beijing 100085,China)

Keywords:: well Han 1; water temperature; continous variation; oil and gas; abnormal mechanism; Tianjin

CLC:: P313

DOI:: 10.20015/j.cnki.ISSN1000-0666.2024.0020

Abstract:: The teleseismic data recorded at 49 seismic stations in Guangdong were selected,and the P-wave receiver function was extracted using the iterative deconvolution method in the time domain.The crustal thickness and Poisson's ratio below the stations were obtained by the Н-к superposition method.The results show that:①In Guangdong region,the crustal thickness ranges from 24.8 to 31.0 km,with an average of 28.3 km,and becomes thinner and thinner from northwest to southeast,showing a regional zonal distribution.This may be related to the geological structure of the uplifted mountains,plains and high land in the study area.②In Guangdong region,Poisson's ratio ranges from 0.220 to 0.287,with a mean value of 0.244.Poisson's ratio is higher in the north and lower in the south,and is higher in coastal areas than inland areas; Poisson's ratio distributes in regional blocks.This may be related to the geological blocks cut by deep major faults in the Crust.③The distribution of the Crustal thickness and Poisson's ratio correspond well with the distribution of the faults and they vary significantly near the faults.④The Crustal thickness and Poisson's ratio are negatively correlated,because during the evolution of the Crust,the ancient Pacific plate extruded toward the Guangdong continent,then the mantle-sourced materials got into the Crust,and partially melted in the deep Crust.This led to the increase of the contents of magnesium and iron in the rocks,thus causing the increase of Poisson's ratio.

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Last Update: 2024-03-20