大兴安岭造山带及两侧邻区莫霍面深度与泊松比分布特征
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摘要
利用2009～2016年内蒙古自治区数字地震台网宽频带固定地震台站的远震波形数据,采用接收函数H-k算法获得23个基岩台站下方的莫霍面深度和泊松比,同时,收集并筛选出277个已有探测台阵和流动台站的接收函数研究结果,综合分析给出大兴安岭造山带及两侧邻区莫霍面深度、泊松比的分布特征。研究表明,研究区域的莫霍面在整体上呈现自东向西逐渐加深的特征,莫霍面深度为25.0～42.3km,平均约为33.5km。莫霍面最浅的区域为松辽盆地(深度为27.0～35.0km),最深的区域为大兴安岭重力梯级带以西地区(深度为41.0～42.3km)。研究区域泊松比为0.19～0.33,平均值为0.26,大于全球大陆地壳的平均值。泊松比高值异常区集中在火山岩区及具有较厚沉积层的盆地。台站所处位置的海拔与莫霍面深度之间具有较强的正相关性,艾里补偿模式在研究区成立,莫霍面起伏与区域地形地貌特征间具有显著的镜像关系。大兴安岭地区的莫霍面深度与泊松比间存在显著的反相关关系,而在松辽盆地及周缘地区未发现明显的规律性,这也意味着松辽盆地在构造演化过程中经历了更为复杂的地壳改造过程。
We collect waveforms of worldwide teleseismic events by 23 broadband seismic stations from the Inner Mongolia Autonomous Region Digital Seismic Network during period of 2009-2016.Using the receiver functions of the H-k method,we calculated the Moho depth and Poisson's ratio beneath those stations constructed on bedrocks. We present the Moho depth and Poisson's ratio distribution characteristic of Greater Khingan Range orogenic belt and surrounding regions based on a compilation of 277 seismic observation array and mobile seismic array for receiver functions H-k analysis published in the literature and our results. Comprehensively analyzing the fine crustal constrains distribution information in this study leads to the following conclusions. The Moho depth of the study area gradually increases from east to west overall,varies from 25.0 km to 42.3 km and the mean of 33.5 km,with the shallowest and deepest Moho being located in the Songliao Basin(27.0-35.0 km) and the western of the Greater Khingan Range gravity anomaly gradient belt(41.0-42.3 km),respectively. The average Poisson's ratio is about 0.27 and varies from 0.19 to 0.33 for the study area. It is higher than the average Poisson's ratio of global continental crust. The highest Poisson's ratio is found in the volcanic region and basin with the thick sediment layer. The Moho depth correlate well with the surface topography and the Airy's isostasy model is suitable for this area. The existence of significant anticorrelation between Moho depth and Poisson's ratio in the Greater Khingan Range area. However,no clear correlation is observed in the Songliao Basin and its adjacent area. It may reflect that the area experienced quite complex processes of crustal modification in the tectonic evolution process of the Songliao Basin.
We collect waveforms of worldwide teleseismic events by 23 broadband seismic stations from the Inner Mongolia Autonomous Region Digital Seismic Network during period of 2009-2016.Using the receiver functions of the H-k method,we calculated the Moho depth and Poisson's ratio beneath those stations constructed on bedrocks. We present the Moho depth and Poisson's ratio distribution characteristic of Greater Khingan Range orogenic belt and surrounding regions based on a compilation of 277 seismic observation array and mobile seismic array for receiver functions H-k analysis published in the literature and our results. Comprehensively analyzing the fine crustal constrains distribution information in this study leads to the following conclusions. The Moho depth of the study area gradually increases from east to west overall,varies from 25.0 km to 42.3 km and the mean of 33.5 km,with the shallowest and deepest Moho being located in the Songliao Basin(27.0-35.0 km) and the western of the Greater Khingan Range gravity anomaly gradient belt(41.0-42.3 km),respectively. The average Poisson's ratio is about 0.27 and varies from 0.19 to 0.33 for the study area. It is higher than the average Poisson's ratio of global continental crust. The highest Poisson's ratio is found in the volcanic region and basin with the thick sediment layer. The Moho depth correlate well with the surface topography and the Airy's isostasy model is suitable for this area. The existence of significant anticorrelation between Moho depth and Poisson's ratio in the Greater Khingan Range area. However,no clear correlation is observed in the Songliao Basin and its adjacent area. It may reflect that the area experienced quite complex processes of crustal modification in the tectonic evolution process of the Songliao Basin.
引文
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黑龙江省地质矿产局,1993,黑龙江省区域地质志,北京:地质出版社.
嵇少丞、王茜、杨文采,2009,华北克拉通泊松比与地壳厚度的关系及其大地构造意义,地质学报,83(3),324~330.
吉林省地质矿产局,1988,吉林省区域地质志,北京:地质出版社.
蒋国源、权恒,1988,大兴安岭根河、海拉尔盆地中生代火山岩,见:中国地质学会,中国地质科学院沈阳地质矿产研究所所刊文集(17),27~104,沈阳:辽宁科学技术出版社.
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李永华、吴庆举、安张辉等,2006,青藏高原东北缘地壳S波速度结构与泊松比及其意义,地球物理学报,49(5),1359~1368.
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齐刚、陈棋福,2015,太行山与燕山交汇部位的地壳厚度与泊松比分布特征,地球物理学报,58(9),3239~3250.
邵济安、刘福田、陈辉等,2001,大兴安岭-燕山晚中生代岩浆活动与俯冲作用关系,地质学报,75(1),56~63.
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唐新功,2009,鄂尔多斯地区重力均衡研究,工程地球物理学报,6(4),395~398.
危自根、陈凌,2012,东北地区至华北北缘地壳结构的区域差异:地壳厚度与波速比的联合约束,地球物理学报,55(11),3601~3614.
危自根、储日升、陈凌,2015,华北克拉通地壳结构区域差异的接收函数研究,中国科学:地球科学,45(10),1504~1514.
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杨宝俊、穆石敏、金旭等,1996,中国满洲里-绥芬河地学断面地球物理综合研究,地球物理学报,39(6),772~782.
杨彦明,2017,内蒙古精细地壳结构研究,硕士学位论文,合肥:中国科学技术大学.
杨彦明、姜立新、王祯祥,2017,基于Levenberg-Marquardt方法的内蒙古及邻区地震烈度影响场改进技术,地震,37(3),117~126.
杨彦明、张国清、陈婧等,2016,鄂尔多斯块体北缘及邻区Moho面深度特征,地震地磁观测与研究,37(6),1~8.
杨彦明、张文韬、张帆等,2013,内蒙古地震监测台网的建设与发展,高原地震,25(2),22~25、12.
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张振法、葛昌宝,2000,内蒙古东部区深部构造特征和大地构造问题浅议,内蒙古地质,(3),6~18.
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Liu J Q,Han J T,Fyfe W S,2001,Cenozoic episodic volcanism and continental rifting in northeast China and possible link to Japan Sea development as revealed from K-Ar geochronology,Tectonophysics,339(3/4),385~401.
Mooney W D,Brocher T M,1987,Coincident seismic reflection/refraction studies of the continental lithosphere:A global review,Rev Geophys,25(4),723~742.
Tao K,Niu F L,Ning J Y,et al,2014,Crustal structure beneath NE China imaged by NECESSArray receiver function data,Earth Planet Sci Lett,398,48~57.
Tian X B,Zhang Z J,2013,Bulk crustal properties in NE Tibet and their implications for deformation model,Gondwana Res,24(2),548~559.doi:10.1016/j.gr.2012.12.024.
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Wang P J,Liu Z J,Wang S X,et al,2002,40Ar/39Ar and K/Ar dating on the volcanic rocks in the Songliao Basin,NE China:constraints on stratigraphy and basin dynamics,Int J Earth Science,91(2),331~340.
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黑龙江省地质矿产局,1993,黑龙江省区域地质志,北京:地质出版社.
嵇少丞、王茜、杨文采,2009,华北克拉通泊松比与地壳厚度的关系及其大地构造意义,地质学报,83(3),324~330.
吉林省地质矿产局,1988,吉林省区域地质志,北京:地质出版社.
蒋国源、权恒,1988,大兴安岭根河、海拉尔盆地中生代火山岩,见:中国地质学会,中国地质科学院沈阳地质矿产研究所所刊文集(17),27~104,沈阳:辽宁科学技术出版社.
李锦轶、张进、杨天南等,2009,北亚造山区南部及其毗邻地区地壳构造分区与构造演化,吉林大学学报(地球科学版),39(4),584~605.
李英康、高锐、姚聿涛等,2014,大兴安岭造山带及两侧盆地的地壳速度结构,地球物理学进展,29(1),73~83.
李永华、吴庆举、安张辉等,2006,青藏高原东北缘地壳S波速度结构与泊松比及其意义,地球物理学报,49(5),1359~1368.
李志安、闰义,2000,中国东北造山带-盆地系统动力学研究,大地构造与成矿学,24(1),31~37.
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刘殿秘、韩立国、翁爱华等,2007,松辽盆地西北边界部分地球物理特征,地球物理学进展,22(6),1722~1727.
柳俊茹,2014,中国东北地区地壳结构研究,硕士学位论文,大庆:东北石油大学.
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邵济安、刘福田、陈辉等,2001,大兴安岭-燕山晚中生代岩浆活动与俯冲作用关系,地质学报,75(1),56~63.
邵济安、张履桥、肖庆辉等,2005,中生代大兴安岭的隆起---一种可能的陆内造山机制,岩石学报,21(3),789~794.
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唐新功,2009,鄂尔多斯地区重力均衡研究,工程地球物理学报,6(4),395~398.
危自根、陈凌,2012,东北地区至华北北缘地壳结构的区域差异:地壳厚度与波速比的联合约束,地球物理学报,55(11),3601~3614.
危自根、储日升、陈凌,2015,华北克拉通地壳结构区域差异的接收函数研究,中国科学:地球科学,45(10),1504~1514.
吴福元、孙德有、张广良等,2000,论燕山运动的深部地球动力学本质,高校地质学报,6(3),379~388.
杨宝俊、穆石敏、金旭等,1996,中国满洲里-绥芬河地学断面地球物理综合研究,地球物理学报,39(6),772~782.
杨彦明,2017,内蒙古精细地壳结构研究,硕士学位论文,合肥:中国科学技术大学.
杨彦明、姜立新、王祯祥,2017,基于Levenberg-Marquardt方法的内蒙古及邻区地震烈度影响场改进技术,地震,37(3),117~126.
杨彦明、张国清、陈婧等,2016,鄂尔多斯块体北缘及邻区Moho面深度特征,地震地磁观测与研究,37(6),1~8.
杨彦明、张文韬、张帆等,2013,内蒙古地震监测台网的建设与发展,高原地震,25(2),22~25、12.
英基丰、周新华、张连昌等,2008,北大兴安岭晚中生代火山岩的年代学和地球化学研究及其构造意义,矿物岩石地球化学通报,27(增刊Ⅰ),66~67.
张广成,2012,用接收函数方法研究中国东北地区地壳上地幔结构,博士学位论文,北京:中国地震局地球物理研究所.
张贻侠、孙运生、张兴洲等,1998,中国满洲里-绥芬河地学断面1︰1000000说明书,北京:地质出版社.
张振法,1990,内蒙古主要山体“山根”问题研讨---山形异常和镜像异常补偿模式,物探与化探,14(3),232~238.
张振法、葛昌宝,2000,内蒙古东部区深部构造特征和大地构造问题浅议,内蒙古地质,(3),6~18.
赵勇伟,2010,大兴安岭第四纪火山地质与地球化学研究,博士学位论文,北京:中国地震局地质研究所.
郑秀芬、欧阳飚、张东宁等,2009,“国家数字测震台网数据备份中心”技术系统建设及其对汶川大地震研究的数据支撑,地球物理学报,52(5),1412~1417.doi:10.3969/j.issn.0001-5733.2009.05.031.
Christensen N I,1996,Poisson's ratio and crustal seismology,J Geophys Res,101(B2),3139~3156.
Fan W M,Guo F,Wang Y J,et al,2003,Late Mesozoic calcalkaline volcanism of post-orogenic extension in the northern Da Hinggan Mountains,northeastern China,J Volcanol Geotherm Res,121(1/2),115~135.
Feng Z Q,Jia C Z,Xie X N,et al,2010,Tectonostratigraphic units and stratigraphic sequences of the nonmarine Songliao Basin,northeast China,Basin Res,22(1),79~95.
Gao S,Zhang B R,Jin Z M,et al,1998,How mafic is the lower continental crust?Earth Planet Sci Lett,161(1/2/3/4),101~117.
Langston C A,1979,Structure under Mount Rainier,Washington,inferred from teleseismic body waves,J Geophys Res,84(B9),4749~4762.
Liu J Q,Han J T,Fyfe W S,2001,Cenozoic episodic volcanism and continental rifting in northeast China and possible link to Japan Sea development as revealed from K-Ar geochronology,Tectonophysics,339(3/4),385~401.
Mooney W D,Brocher T M,1987,Coincident seismic reflection/refraction studies of the continental lithosphere:A global review,Rev Geophys,25(4),723~742.
Tao K,Niu F L,Ning J Y,et al,2014,Crustal structure beneath NE China imaged by NECESSArray receiver function data,Earth Planet Sci Lett,398,48~57.
Tian X B,Zhang Z J,2013,Bulk crustal properties in NE Tibet and their implications for deformation model,Gondwana Res,24(2),548~559.doi:10.1016/j.gr.2012.12.024.
Turcotte D L,Schubert G,2002,Geodynamics,2nd ed,397~399,United Kingdom:Cambridge University Press.
Wang C Y,Sandvol E,Zhu L,et al,2014,Lateral variation of crustal structure in the Ordos block and surrounding regions,North China,and its tectonic implications,Earth Planet Sci Lett,387,198~211.
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