上海奉城—浙江湖州长周期MT剖面揭示的深部电性结构
|
摘要
利用GMS-06电磁观测系统对上海奉城—浙江湖州剖面进行了大地电磁数据采集,获得了超过4000s的高质量长周期观测数据,为沪浙地区深部电性结构研究提供了有利条件.通过反演处理,综合倾子解释结果和重磁资料以及最新的地震解释结果,在电性和断裂结构上获得了新的认识,对湖州—苏州、乌镇—马金、枫泾—川沙以及太仓—奉贤这几条深大断裂带的展布以及对区域构造格架的控制作用进行了新的评价,其中枫泾—川沙断裂是上海断隆和湖州—南通台拱之间推覆构造过渡带的控制断裂,太仓—奉贤断裂带的主体位置推断在亭林附近.同时,对高阻基底以上电性层进行了解释,揭示了岩石圈底界面的结构和构造形态,推断湖州—苏州断裂西侧存在壳内高导层.
A magnetotelluric sounding (MT) profile from Fengcheng of Shanghai to Huzhou of Zhejiang province was conducted using GMS-06 surveying system,high quality long period data over 4000 s were obtained. By inversion and processing, these MT data provide basis for the studies of deep electrical and fault structures. Integrating with tipper interpretation result,gravity & magnetic data and updated seismic interpretation,new recognitions about the conductivity and fault structures are obtained. The styles of several large and deep faults such as Huzhou—Suzhou,Wuzhen—Majin,Fengjing—Chuansha and Taicang—Fengxian and their roles in controlling the regional tectonics are evaluated. The fault of Fengjing—Chuansha controls the nappe transition structure zone between Shanghai uplift and Huzhou—Nantong arched area. The main distribution position of the fault of Taicang—Fengxian is deduced at the vicinity of Tinglin. Moreover,the electrical strata overlying on the high resistant basement,the crustal high—conductive stratum existing in the west area of Huzhou-Suzhou fault,the bottom interface of lithosphere,are also revealed and interpreted.
A magnetotelluric sounding (MT) profile from Fengcheng of Shanghai to Huzhou of Zhejiang province was conducted using GMS-06 surveying system,high quality long period data over 4000 s were obtained. By inversion and processing, these MT data provide basis for the studies of deep electrical and fault structures. Integrating with tipper interpretation result,gravity & magnetic data and updated seismic interpretation,new recognitions about the conductivity and fault structures are obtained. The styles of several large and deep faults such as Huzhou—Suzhou,Wuzhen—Majin,Fengjing—Chuansha and Taicang—Fengxian and their roles in controlling the regional tectonics are evaluated. The fault of Fengjing—Chuansha controls the nappe transition structure zone between Shanghai uplift and Huzhou—Nantong arched area. The main distribution position of the fault of Taicang—Fengxian is deduced at the vicinity of Tinglin. Moreover,the electrical strata overlying on the high resistant basement,the crustal high—conductive stratum existing in the west area of Huzhou-Suzhou fault,the bottom interface of lithosphere,are also revealed and interpreted.
引文
[1]姚保华,章振铨,王家林等.上海地区地壳精细结构的综合地球物理探测研究.地球物理学报,2007,50(2):482~491Yao B H,Zhang Z Q,Wang J L,et al.Prospecting and research on fine crustal structure by using multi-geophysics survey methods in Shanghai region.Chinese J.Geophys.(in Chinese),2007,50(2):482~491
[2]陈沪生,周雪清,李道琪等.中国东部灵壁-奉贤(HQ-13)地学断面图(1∶1000000)说明书.北京:地质出版社,1993Chen HS,Zhou X Q,Li D Q,et al.Explanatory Notes of the Geoscience Transect of Lingbi-Fengxian(HQ-13)in Eastern China(1∶1000000)(in Chinese).Beijing:Geological Publishing House,1993
[3]于鹏,吴健生,王家林等.GMS-06等大地电磁仪采集数据的对比分析与实测资料的处理解释.地震学报,2006,28(5):554~557Yu P,Wu J S,Wang J L,et al.Comparisons,processing and interpretation of the surveyed data by GMS-06and other magnetotelluric sounding systems.Acta Seismologica Sinica(in Chinese),2006,28(5):554~557
[4]于鹏,吴健生,张新兵.利用长周期MT数据研究沪浙地区深部断裂结构.同济大学学报,2008,36(4)Yu P,Wu J S,Zhang X B.Usinglong period magnetotelluric data to study deep fault structure in Shanghai&Zhejiang area.Journal of Tongji University(in Chinese),2008,36(4)
[5]火恩杰,刘昌森,章振铨等.上海市隐伏断裂及其活动性研究.北京:地震出版社,2004Huo EJ,Liu C S,Zhang Z Q,et al.Studies of Buried Fault and Its Activity in Shanghai Area(in Chinese).Beijing:Seismological Press,2004
[6]于鹏,王家林,吴健生.有限差分法大地电磁多参数偏移成像.地球物理学报,2001,44(4):552~562Yu P,Wang J L,Wu J S.Multi-parameter migration imaging of magnetotelluric data using finite difference method.Chinese J.Geophys.(in Chinese),2001,44(4):552~562
[7]杨辉,王家林,吴健生等.大地电磁与地震资料仿真退火约束联合反演.地球物理学报,2002,45(5):723~734Yang H,Wang J L,Wu J S,et al.Constrained joint inversion of magnetotelluric and seismic data usingsimulated annealing algorithm.Chinese J.Geophys.(in Chinese),2002,45(5):723~734
[8]陈乐寿,王光锷.大地电磁测深法.北京:地质出版社,1990Chen LS,Wang G E.Magnetotelluric Sounding(in Chinese).Beijing:Geological Publishing House,1990
[9]Yu P,Wang J L,Wu J S.Using the pseudo-tipper data of magnetotelluric sounding to study fault.CPS/SEG2004International Geophyscial Conference,2004.725~729
[10]胡文宝,苏朱刘,陈清礼等.倾子资料的特征及应用.石油地球物理勘探,1997,32(2):202~213Hu WB,Su Z L,Chen Q L,et al.Character of tipper data and application.Oil Geophysical Prospecting(in Chinese),1997,32(2):202~213
[11]陈沪生,张永鸿,徐师文等.下扬子及邻区岩石圈结构构造特征与油气资源评价.北京:地质出版社,1999Chen HS,Zhang Y H,Xu S W,et al.The Lithospheric Textural and Structural Features as Well as Oil and Gas Evaluation in the Lower Yangtze Area and Its Adjacent Region,China(in Chinese).Beijing:Geological Publishing House,1999
[2]陈沪生,周雪清,李道琪等.中国东部灵壁-奉贤(HQ-13)地学断面图(1∶1000000)说明书.北京:地质出版社,1993Chen HS,Zhou X Q,Li D Q,et al.Explanatory Notes of the Geoscience Transect of Lingbi-Fengxian(HQ-13)in Eastern China(1∶1000000)(in Chinese).Beijing:Geological Publishing House,1993
[3]于鹏,吴健生,王家林等.GMS-06等大地电磁仪采集数据的对比分析与实测资料的处理解释.地震学报,2006,28(5):554~557Yu P,Wu J S,Wang J L,et al.Comparisons,processing and interpretation of the surveyed data by GMS-06and other magnetotelluric sounding systems.Acta Seismologica Sinica(in Chinese),2006,28(5):554~557
[4]于鹏,吴健生,张新兵.利用长周期MT数据研究沪浙地区深部断裂结构.同济大学学报,2008,36(4)Yu P,Wu J S,Zhang X B.Usinglong period magnetotelluric data to study deep fault structure in Shanghai&Zhejiang area.Journal of Tongji University(in Chinese),2008,36(4)
[5]火恩杰,刘昌森,章振铨等.上海市隐伏断裂及其活动性研究.北京:地震出版社,2004Huo EJ,Liu C S,Zhang Z Q,et al.Studies of Buried Fault and Its Activity in Shanghai Area(in Chinese).Beijing:Seismological Press,2004
[6]于鹏,王家林,吴健生.有限差分法大地电磁多参数偏移成像.地球物理学报,2001,44(4):552~562Yu P,Wang J L,Wu J S.Multi-parameter migration imaging of magnetotelluric data using finite difference method.Chinese J.Geophys.(in Chinese),2001,44(4):552~562
[7]杨辉,王家林,吴健生等.大地电磁与地震资料仿真退火约束联合反演.地球物理学报,2002,45(5):723~734Yang H,Wang J L,Wu J S,et al.Constrained joint inversion of magnetotelluric and seismic data usingsimulated annealing algorithm.Chinese J.Geophys.(in Chinese),2002,45(5):723~734
[8]陈乐寿,王光锷.大地电磁测深法.北京:地质出版社,1990Chen LS,Wang G E.Magnetotelluric Sounding(in Chinese).Beijing:Geological Publishing House,1990
[9]Yu P,Wang J L,Wu J S.Using the pseudo-tipper data of magnetotelluric sounding to study fault.CPS/SEG2004International Geophyscial Conference,2004.725~729
[10]胡文宝,苏朱刘,陈清礼等.倾子资料的特征及应用.石油地球物理勘探,1997,32(2):202~213Hu WB,Su Z L,Chen Q L,et al.Character of tipper data and application.Oil Geophysical Prospecting(in Chinese),1997,32(2):202~213
[11]陈沪生,张永鸿,徐师文等.下扬子及邻区岩石圈结构构造特征与油气资源评价.北京:地质出版社,1999Chen HS,Zhang Y H,Xu S W,et al.The Lithospheric Textural and Structural Features as Well as Oil and Gas Evaluation in the Lower Yangtze Area and Its Adjacent Region,China(in Chinese).Beijing:Geological Publishing House,1999
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心