|本期目录/Table of Contents|

[1]李婷婷,刘 利,范文华,等.基于远震P波接收函数研究江苏地区地壳厚度和泊松比*[J].地震研究,2020,43(04):680-688.
　LI Tingting,LIU Li,FAN Wenhua,et al.Crustal Thickness and Ratio of Poisson in Jiangsu Area by Teleseismic Receiver Function[J].Journal of Seismological Research,2020,43(04):680-688.
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基于远震P波接收函数研究江苏地区地壳厚度和泊松比*(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
43
期数:
2020年04期
页码:
680-688
栏目:
出版日期:
2020-09-17

文章信息/Info

Title:
Crustal Thickness and Ratio of Poisson in Jiangsu Area by Teleseismic Receiver Function
作者:
李婷婷; 刘 利; 范文华; 孙业君
(江苏省地震局,江苏 南京 210014)
Author(s):
LI Tingting; LIU Li; FAN Wenhua; SUN Yejun
(Jiangsu Earthquake Agency,Nanjing 210014,Jiangsu,China)
关键词:
接收函数;  H-K叠加;  地壳厚度;  泊松比
Keywords:
receiver function;  H-K stacking;  crustal thickness;  poisson's ratio
分类号:
P315.2
DOI:
-
摘要:
根据江苏数字地震台网32个宽频带地震台站记录的远震波形资料,使用时间域反褶积的方法提取P波接收函数,由H-K叠加搜索方法反演得到各台站下方的地壳厚度和泊松比。结果表明:①江苏地区地壳厚度整体呈现自东向西增厚趋势,具有明显的空间分布特征,与该区地质构造背景有较好的对应。主要表现为:苏鲁造山带地区地壳厚度高于其周边地区; 华北板块的地壳厚度变化比较平缓,主要为32～33 km; 下扬子板块地区的地壳厚度变化较大,为27～34 km,位于该区中东部大陆边缘地区的台站下方平均地壳厚度约为28 km。②研究区泊松比为0.22～0.28,受高压和超高压变质岩带影响,苏鲁造山带及周边地区的泊松比较高; 下扬子板块的茅东断裂及周边地区的泊松比变化明显,呈高低相间分布,且泊松比高值区及变化明显区与地震活动性具有一定的关系。
Abstract:
In this paper,we calculate P-wave receiver functions by time domain deconvolution method under the 32 stations in Jiangsu Province from three'component digital waveform data of teleseismic earthquake events and obtain the thickness and average poisson's ratio in the crust of this area by H-K stacking.The results show that:①The crustal thickness in Jiangsu area has a thickening trend from east to west and obvious spatial distribution characteristics,which has a good correspondence with the geological tectonic setting,The first one is the crustal thickness in the Sulu orogenic belt area is higher than that in the surrounding area; the second one is the crustal thickness in the North China plate is relatively flat,mainly between 32 km and 33 km; and the last one is the crustal thickness in the Lower Yangtze plate area varies greatly between 27 km and 34 km and the average crust thickness in the central and eastern continental margins of this area is about 28 km.②The poisson's ratio in the study area is between 0.22 and 0.28.Because of the high-pressure and ultra-high-pressure metamorphic rocks,the poisson's ratio located below the Sulu orogenic belt and the surrounding area is higher.The poisson's ratio changes significantly and shows a high and low phase distribution in the Maodong fault and its surrounding area which is located in the lower Yangtze block,and the higher poisson's ratio area and the changing poisson's ratio area have a certain relationship with the seismic activity.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-11-07
基金项目: 2019年三结合提升性课题(3JH-201902017)和江苏省科技支撑——社会发展项目(BE2016804)联合资助.
通讯作者:孙业君(1979-),高级工程师.主要从事地震预报、数字地震学研究.E-mail:382231407@qq.com

更新日期/Last Update: 2020-09-17