CAJ | 학술논문

利用山东、河北、辽宁、北京、天津等区域地震台网记录的远震资料，采用接收函数H-k 叠加搜索方法，得到了张家口—渤海地震活动带及其邻区99个台站下方的地壳厚度和平均泊松比估计。研究结果显示：研究区地壳厚度在30—46 km 之间显著变化，地壳厚度与地表地形相关性很好，呈现出从隆起区到盆地区逐渐减薄的变化趋势；研究区地壳泊松比具有明显的分区特点，燕山地区泊松比偏低可能与该地区克拉通破坏方式以拆沉为主有关，郯城—庐江断裂带山东段出现的泊松比高低混杂现象可能与该地区火山活动有关，张家口—渤海地震活动带西段与隆起的交汇地带，部分台站下方地壳的泊松比值偏高，可能是断裂带附近岩石比较破碎与岩石部分熔融共同作用的结果。此外，位于渤海湾中间岛链上的北隍城台下方地壳较厚，泊松比较低，其原因尚待查明。
이용산동、하북、료녕、북경、천진등구역지진태망기록적원진자료，채용접수함수H-k 첩가수색방법，득도료장가구—발해지진활동대급기린구99개태참하방적지각후도화평균박송비고계。연구결과현시：연구구지각후도재30—46 km 지간현저변화，지각후도여지표지형상관성흔호，정현출종륭기구도분지구축점감박적변화추세；연구구지각박송비구유명현적분구특점，연산지구박송비편저가능여해지구극랍통파배방식이탁침위주유관，담성—려강단렬대산동단출현적박송비고저혼잡현상가능여해지구화산활동유관，장가구—발해지진활동대서단여륭기적교회지대，부분태참하방지각적박송비치편고，가능시단렬대부근암석비교파쇄여암석부분용융공동작용적결과。차외，위우발해만중간도련상적북황성태하방지각교후，박송비교저，기원인상대사명。
Based on the teleseismic events recorded by seismic stations of Shan-dong,Hebei,Liaoning,Beijing,Tianjin regional seismograph networks,this paper investigates the crustal thickness and average Poisson’s ratios beneath the stations by means of H-k receiver function stacking method.The results show that the crustal thickness in the studied region varies from 30 km to 46 km,and is thinning gradually from mountain to basin,suggesting a good correlation with surface terrain.On the other hand,distribution of the Poisson’s ratio overthe studied region is characterized by an obvious region segmentation.The low Poisson’s ratios beneath the east part of Yanshan might relate to the delaminationof North China craton.The region beneath east part of Tancheng-Luj iangfault zone exhibits a complex distribution of low Poisson’s ratios mixed withhigh ones,which might be related to volcanic activity.The convergence zone ofthe western segment of Zhangj iakou-Bohai seismic active belt and the lift exhibitsa little higher Poisson’s ratios,which might be caused by both broken rocksand the partial fusion of rocks near the seismic active belt. The station Beihuangcheng located on the island chain in the Bohai Sea shows a thick crustalthickness and a low Poisson’s ratio,but the reason behind the phenomenonwaits for further investigation.