伊舒断裂带北段是黑龙江省地震跟踪监测重点区域之一，具有较强的地震活动性，为主要历史强震发生区域。利用该区域4个固定地震台记录到的远震地震事件资料，采用频率域反褶积方法，提取远震P波接收函数，再利用H—κ叠加方法计算台站下方莫霍面深度和泊松比。结果表明：受太平洋板块俯冲作用的影响，块体间相互挤压，双鸭山地震台下方莫霍面发生了错断，并且一侧莫霍面叠置在另外一侧上方，鹤岗地震台西侧莫霍面上方存在1个速度间断面；区域内泊松比值较高，为0.266—0.277，反映了上地幔铁镁物质上涌到下地壳中。
The northern segment of the Yishu fault zone is one of the key areas of earthquake monitoring in Heilongjiang Province. It has strong seismicity and is the main historical strong earthquake occurrence area. In this paper, P-wave receiver functions are computed from seismograms of teleseismic events recorded at four fixed seismic stations in the area using the frequency domain deconvolution method, and then the Moho depth and Poisson's ratio are calculated by the H-kappa superposition method. Results show dislocation and superposition of the Moho beneath the Shuangyashan Seismic Station, and there is a velocity discontinuity above the Moho in the west of Hegang station; Poisson's ratio ranges from 0.266 to 0.277 in the study area, which reflects the upwelling of iron and magnesium materials from the upper mantle into the lower crust.
2021,42(5): 76-81 收稿日期：2020-08-07
DOI：10.3969/j.issn.1003-3246.2021.05.011
基金项目：黑龙江省地震局一般项目（项目编号：202004）
作者简介：李大伟(1983-),男,硕士,工程师,主要从事地震监测和片区台站维护工作。E-mail:25901230@qq.com
参考文献：
陈洪洲,关玉辉,戴忻志,等. 一架山火山考察[J]. 东北地震研究,2001,17(3):46-50.
黑龙江省地质矿产局. 黑龙江省区域地质志[M]. 北京:地质出版社,1993.
吕睿,宫猛,孟小琴,等. 利用远震接收函数反演山西地区台站下方的地壳厚度及泊松比[J]. 华北地震科学,2016,34(1):59-64.
吴宝峰,刘财,郝永梅,等. 依舒断裂带北段及邻近地区地震活动性的初步研究[J]. 地震地磁观测与研究,2012,33(3):46-49.
吴宝峰,徐建权,郝永梅,等. 黑龙江省东北部地区构造断裂与地震活动关系的研究[J]. 防灾减灾学报,2015,31(1):46-53.
许浚远. 依舒地堑新生代构造演化[J]. 地球科学-中国地质大学学报,1997,22(4):406-410.
杨宝俊. 在地学断面域内用地震学方法研究大陆地壳:以中国满洲里-绥芬河地学断面为例[M]. 北京:地质出版社,1999.
张宝文,赵翠萍,周连庆. 基于接收函数方法研究川滇块体东边界的地壳厚度和泊松比[J]. 地震,2015,35(1):55-64.
张广成. 用接收函数方法研究中国东北地区地壳上地幔结构[D]. 北京:中国地震局地球物理研究所,2012.
Holbrook W S, Mooney W D, Christensen N I. The seismic velocity structure of the deep continental crust[M]//Fountain D M, Arculus R, Kay R W. Continental Lower Crust. Amsterdam:Elsevier, 1992:1-43.
Langston C A. Structure under mount rainier, Washington, inferred from Teleseismic body waves[J]. Journal of Geophysical Research:Solid Earth, 1979, 84(B9):4 749-4 762.
Phinney R A. Structure of the Earth's crust from spectral behavior of long-period body waves[J]. Journal of Geophysical Research, 1964, 69(14):2 997-3 017.
Zhu L P, Kanamori H. Moho depth variation in southern California from teleseismic receiver functions[J]. Journal of Geophysical Research:Solid Earth, 2000, 105(B2):2 969-2 980.
