东大别山构造带六安—英山地磁剖面观测与地震研究
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摘要
本文以东大别构造带内六安—英山地磁剖面磁异常数据为基础,结合研究区域地质学和地震学研究成果,反演给出研究区域居里面埋深及地下介质磁性结构模型.通过对磁异常变化特征曲线、介质磁性结构模型分析发现:东大别构造带北部磁异常较强且波动较大、地下磁性结构特征相对复杂,北淮阳地区磁异常较弱、地下介质结构成叠瓦状形态分布,合肥盆地磁异常曲线变化平缓、埋深较深,为连续均匀的磁性基底,结果较好地反应了合肥盆地、北淮阳、东大别构造带北部之间的差异;"霍山地震窗"地壳下方6～12km处存在显著地磁性差异,结合东大别构造带内70年代以来地震和历史强震,对"霍山地震窗"地震活动性与地下构造、场源关系进行了研究,初步探讨了其动力学成因.
In this paper,based on the geomagnetic survey line from LuAn to YingShan in the Eastern Dabie Orogen,the geomagnetic anomaly are picked up.Assisted by the geology and seismology results,the depth of Curie surface was inverted,and the model of subsurface magnetic structure was built.According to analyzing the curve of the magnetic anomaly and magnetic structure model,it was found that the results reflect strongly the differences among the Hefei Basin,North Huaiyang area,and Eastern Dabie Orogen.In the Eastern Dabie Orogen,the magnetic structure is complex,related to the strong and undulate geomagnetic curve.In the North Huaiyang area,it shows that the geomagnetic structure is imbricate with the weak magnetic anomalies curve.And in the Hefei Basin,the basement appears deeply buried,continuous and uniform,leading to the flat magnetic anomalies curve.Simultaneously,a significant difference of magnetic properties in the area from 6 to 12 km depth in the Huoshan region is noticed.Combined with the earthquake from 1970 and strong historical earthquake,the connection of the seismicity of HuoShan seismic window with the underground structure and field resource is studied,and the dynamic causes of HouShan seismic window is discussed preliminarily.
In this paper,based on the geomagnetic survey line from LuAn to YingShan in the Eastern Dabie Orogen,the geomagnetic anomaly are picked up.Assisted by the geology and seismology results,the depth of Curie surface was inverted,and the model of subsurface magnetic structure was built.According to analyzing the curve of the magnetic anomaly and magnetic structure model,it was found that the results reflect strongly the differences among the Hefei Basin,North Huaiyang area,and Eastern Dabie Orogen.In the Eastern Dabie Orogen,the magnetic structure is complex,related to the strong and undulate geomagnetic curve.In the North Huaiyang area,it shows that the geomagnetic structure is imbricate with the weak magnetic anomalies curve.And in the Hefei Basin,the basement appears deeply buried,continuous and uniform,leading to the flat magnetic anomalies curve.Simultaneously,a significant difference of magnetic properties in the area from 6 to 12 km depth in the Huoshan region is noticed.Combined with the earthquake from 1970 and strong historical earthquake,the connection of the seismicity of HuoShan seismic window with the underground structure and field resource is studied,and the dynamic causes of HouShan seismic window is discussed preliminarily.
引文
[1]王清晨,孙枢,李继亮,等.秦岭的大地构造演化[J].地质科学,1989,(2):129-142.Wang Q C,Sun S,Li J L,et al.The tectonic evolution of theQingling mountain belt[J].Acta Geologica Sinica(inChinese),1989,(2):129-142.
[2]刘福田,徐佩芬,刘劲松,等.大陆深俯冲带的地壳速度结构—东大别造山带深地震宽角反射/折射研究[J].地球物理学报,2003,46(3):366-372.Liu F T,Xu P F,Liu J S,et al.The crustal velocity structureof the continental deep subduction belt:study on the easternDaBie orogen by seismic wide-angle reflction/refraction[J].Chinese J.Geophys.(in Chinese),2003,46(3):5366-372.
[3]姚大全,张杰,沈小七.安徽霍山地区断层活动习性研究的新进展[J].地球物理学进展,2006,21(3):776-782.Yao D Q,Zhang H,Shen X Q.New advance of fault activebehavior research in Huoshan area Anhui province[J].Progress in Geophysics(in Chinese),2006,21(3):776-782.
[4]张杰,沈小七,王行舟,等.利用层析成像的结果探讨安徽及邻区中强地震深部构造背景[J].中国地质,2005,21(3):350-359.Zhang J,Shen X Q,Wang X Z,et al.Discussion on deeptectonic backgrounds of moderate-strong earthquake in Anhuiand its neighboring region by using results of seismictomography[J].Earthquake Research in China(in Chinese),2005,21(3):350-359.
[5]姚大全,刘家灿,李杰,等.六安-霍山地震危险区地震活动和地震构造[J].地震地质,2003,25(2):211-219.Yao D Q,Liu J C,Li J,et al.Seismic activities and structuresof the Luan-Huoshan seismic risk area[J].Seismology andGeology(in Chinese),2003,25(2):211-219.
[6]姚大全,汤有标,刘加灿,等.大别山东北部基岩区断裂活动习性的综合研究[J].地震地质,1999,21(1):63-68.Yao D Q,Li J.synthetical study on active behavior of fault inbed rock area of northeastern Dabie mountain[J].Seismologyand Geology(in Chinese),1999,21(1):63-68.
[7]闫素萍,张毅,张有林,等.东大别构造带地震地磁监测试验区岩石圈磁场特征分析[J].地球物理学进展,2010:1599-1604.Yan S P,Zhang Y,Zhang Y L,et al.Characteristics of thegeomagnetic field of lithosphere in the eastern Dabie orogen[J].Progress in Geophysics(in Chinese),2010:1599-1604.
[8]徐树桐,江来利,刘贻灿,等.大别山区(安徽部分)的构造格局和演化过程[J].地质学报,1992,66(1):1-15.Xu S T,Jiang L L,Liu Y C,et al.Tectonic framework andevolution of the DaBie mountains in Anhui,Eastern China[J].Acat Geologica Sinica(in Chinese),1992,66(1):1-15.
[9]王椿镛,张先康,陈布云,等.大别造山带的地壳结构研究[J].中国科学(D),1997,27(3):221-226.Wang C Y,Zhang X K,Chen B Y,et al.The researcher ofcrust structure in Dabie orogenic belt[J].Science in China(Series D)(in Chinese),1997,27(3):221-226.
[10]董树文,吴宣志,高锐,等.大别造山带地壳速度结构与动力学[J].地球物理学报,1998,41(3):349-361.Dong S W,Wu X Z,Gao R,et al.On the crust velocitylevels and dynamics of the Dabieshan orogenci belt[J].Chinese J.Geophys.(in Chinese),1998,41(3):349-361.
[11]徐树桐,袁学诚,吴维平,等.大别山黄石六安反射地震剖面新的地质解释[J].地质通报,2008,27(1):19-26.Xu S T,Yu X C,Wu W P,et al.New geologicalinterpretation of the seismic reflection profile from Huangshito Liu’an across the Dabie Mountains,China[J].GeologicalBulletin of China(in Chinese),2008,27(1):19-26.
[12]徐佩芬,刘福田,王清晨,等.大别-苏鲁碰撞造山带的地震层析成像研究—岩石圈三维速度结构[J].地球物理学报,2000,43(3):377-385.Xu P F,Liu F T,Wang Q C,et al.Seismic tomographybeneath the Dabie-Sulu collision orogen-3Dvelocity structuresof lithosphere[J].Chinese J.Geophys.(in Chinese),2003,46(3):377-385.
[13]杨文采.东大别超高压变质带的深部构造[J].中国科学(D),2003,33(2):183-194.Yang W C.Deep structure of ultrahigh-pressure metamorphicbelt in eastern Dabieshan mountains[J].Science in China(Series D)(in Chinese),2003,33(2):183-194.
[14]杨文采,方慧,程振炎,等.苏鲁超高压变质带北部地球物理调查(Ⅱ)—非地震方法[J].地球物理学报,1999,42(4):508-519.Yang W C,Fang H,Chen Z Y,et al.Geophysicalinvestigation of northern SULU UHPM terrane in East China(Ⅱ):Non-seismic methods[J].Chinese J.Geophys.(inChinese),1999,42(4):508-519.
[15]肖骑彬,赵国泽,詹燕,等.大别山超高压编制带深部电性结构及其动力学意义初步研究[J].地球物理学报,2007,50(3):812-822.Xiao Q B,Zhao G Z,Zhan Y,et al.A preliminary study onelectrical structure and dynamic of ultral-high pressuremetamorphic belt beneath the Dabie Moutains[J].Chinese J.Geophys.(in Chinese),2007,50(3):812-822.
[16]张交东,杨晓勇,刘成斋,等.大别山北缘深部结构的高精度重磁电震解析[J].地球物理学报,2012,55(7):2292-2306.Zhang J D,Yang X Y,Liu C Z,et al.The file deep structureof the northern margin of the Dabie Orogenic Belt fromgravity-magnetic-eldctrical-seismic combination survey[J].Chinese J.Geophys.(in Chinese),2012,55(7):2292-2306.
[17]徐如刚,张毅,王雷,等.九江-瑞昌MS5.7地震前后地磁场水平分量异常追踪与分析[J].地球物理学进展,2010,25(4):1175-1179.Xu R G,Zhang Y,Wang L,et al.Tracing and analyzinganomalies of horizontal geomagnetic component before andafter the MS5.7Jiujiang-Ruichang earthquake[J].Progressin Geophysics(in Chinese),2010,25(4):1175-1179.
[18]管志宁,郝天珧,姚长利.21世纪重力与磁法勘探的展望[J].地球物理学进展,2002,17(2):237-244.Guan Z N,Hao T Y,Yao C L.Prospect of gravity andmagnetic exploration in the 21st century[J].Progress inGeophysics(in Chinese),2002,17(2):237-244.
[19]刘天佑.位场勘探数据处理新方法[M].北京:科学出版社,2007.Liu T Y.New Process Method of Source Field ProspectingData[M](in Chinese).Beijing:Science Press,2007.
[20]刘天佑.重磁勘探软件手册(GMS3.0)方法原理[D].武汉:中国地质大学,2009.Liu T Y.Handbook of Gravity and Magnetic ProspectingSoftware and Principles of GMS3.0[D](in Chinese).Wuhan:China University of Geosciences,2009.
[21]虎喜凤,刘明涛,赵丽,等.豫北地区居里面与地震关系的研究[J].华北地震科学,2000,18(3):26-31.Hu X F,Liu M T,Zhao L,et al.Study of the relationshipbetween curie surface and earthquakes in north Henan[J].North China Earthquake Sciences(in Chinese),2000,18(3):26-31.
[22]张先,刘敏,赵丽等.华北地区居里温度面与地震活动的再研究[J].物探与化探,2000,24(2):81-86.Zhang X,Liu M,Zhao L,et al.Restudy of curietemperature interface and seismicity in north China.[J].Geophysical&Geochemical Exploration(in Chinese),2000,24(2):81-86.
[23]黄兆熊,高德章.上海及其邻域居里面与地震活动趋势[J].地震学报,1992,14(3):363-365.Huang Z X,Gao D Z.Curie temperature interface andseismicity in Shanghai and its adjacent areas[J].Geophysical&Geochemical Exploration(in Chinese),1992,14(3):363-365.
[24]邵世德,严晓红.安徽省及邻区居里面的地质分析[J].合肥工业大学学报(自然科学版),1992,15(2):100-105.Shao S D,Yan X H.Geological analysis curie temperaturesurface in Anhui Province and its adjacent areas[J].Journalof Hefei University of Technology(Natural Science)(inChinese),1992,15(2):100-105.
[25]徐树桐,袁学诚,吴维平,等.大别山黄石-六安反射地震剖面新的地质解释[J].地质通报,2008,27(1):19-26.Xu S T,Yuan X C,Wu W P,et al.New geologicalinterpretation of the seismic reflection rofile from Huangshi toLiu’an across the Dabie Montains,China[J].GeologicalBulletin of China(in Chinese),2008,27(1):19-26.
[26]Blakely R J.Potential Theory in Gravity and Magnetic Applications[M].New York:Cambridge University Press,1995.
[27]潘永信,朱日祥.大别山超高压变质岩带的岩石磁学和磁组构研究及其地质意义[J].岩石学报,2005,21(4):1101-1108.Pan Y X,Zhu R X.Rock magnetism and magnetic fabricstudies of the ultrahigh-pressure(UHP)metamorphic rocksfrom the Dabie organic belt,East-central China:implicationsfor retrograde metamorphism[J].Acta Petrologica Sinica(inChinese),2005,21(4):1101-1108.
[28]徐海军,金振民,欧新功,等.超高压榴辉岩退变质作用对岩石磁化率的影响[J].地球科学-中国地质大学学报,2004,29(6):674-684.Xue H J,Jin Z M,Ou X G,et al.Effects of retrogression ofUltrahigh-Pressure eclogites on magnetic susceptibility andanisotropy[J].Earth Science-Journal of China University ofGeosciences(in Chinese),2004,29(6):674-684.
[2]刘福田,徐佩芬,刘劲松,等.大陆深俯冲带的地壳速度结构—东大别造山带深地震宽角反射/折射研究[J].地球物理学报,2003,46(3):366-372.Liu F T,Xu P F,Liu J S,et al.The crustal velocity structureof the continental deep subduction belt:study on the easternDaBie orogen by seismic wide-angle reflction/refraction[J].Chinese J.Geophys.(in Chinese),2003,46(3):5366-372.
[3]姚大全,张杰,沈小七.安徽霍山地区断层活动习性研究的新进展[J].地球物理学进展,2006,21(3):776-782.Yao D Q,Zhang H,Shen X Q.New advance of fault activebehavior research in Huoshan area Anhui province[J].Progress in Geophysics(in Chinese),2006,21(3):776-782.
[4]张杰,沈小七,王行舟,等.利用层析成像的结果探讨安徽及邻区中强地震深部构造背景[J].中国地质,2005,21(3):350-359.Zhang J,Shen X Q,Wang X Z,et al.Discussion on deeptectonic backgrounds of moderate-strong earthquake in Anhuiand its neighboring region by using results of seismictomography[J].Earthquake Research in China(in Chinese),2005,21(3):350-359.
[5]姚大全,刘家灿,李杰,等.六安-霍山地震危险区地震活动和地震构造[J].地震地质,2003,25(2):211-219.Yao D Q,Liu J C,Li J,et al.Seismic activities and structuresof the Luan-Huoshan seismic risk area[J].Seismology andGeology(in Chinese),2003,25(2):211-219.
[6]姚大全,汤有标,刘加灿,等.大别山东北部基岩区断裂活动习性的综合研究[J].地震地质,1999,21(1):63-68.Yao D Q,Li J.synthetical study on active behavior of fault inbed rock area of northeastern Dabie mountain[J].Seismologyand Geology(in Chinese),1999,21(1):63-68.
[7]闫素萍,张毅,张有林,等.东大别构造带地震地磁监测试验区岩石圈磁场特征分析[J].地球物理学进展,2010:1599-1604.Yan S P,Zhang Y,Zhang Y L,et al.Characteristics of thegeomagnetic field of lithosphere in the eastern Dabie orogen[J].Progress in Geophysics(in Chinese),2010:1599-1604.
[8]徐树桐,江来利,刘贻灿,等.大别山区(安徽部分)的构造格局和演化过程[J].地质学报,1992,66(1):1-15.Xu S T,Jiang L L,Liu Y C,et al.Tectonic framework andevolution of the DaBie mountains in Anhui,Eastern China[J].Acat Geologica Sinica(in Chinese),1992,66(1):1-15.
[9]王椿镛,张先康,陈布云,等.大别造山带的地壳结构研究[J].中国科学(D),1997,27(3):221-226.Wang C Y,Zhang X K,Chen B Y,et al.The researcher ofcrust structure in Dabie orogenic belt[J].Science in China(Series D)(in Chinese),1997,27(3):221-226.
[10]董树文,吴宣志,高锐,等.大别造山带地壳速度结构与动力学[J].地球物理学报,1998,41(3):349-361.Dong S W,Wu X Z,Gao R,et al.On the crust velocitylevels and dynamics of the Dabieshan orogenci belt[J].Chinese J.Geophys.(in Chinese),1998,41(3):349-361.
[11]徐树桐,袁学诚,吴维平,等.大别山黄石六安反射地震剖面新的地质解释[J].地质通报,2008,27(1):19-26.Xu S T,Yu X C,Wu W P,et al.New geologicalinterpretation of the seismic reflection profile from Huangshito Liu’an across the Dabie Mountains,China[J].GeologicalBulletin of China(in Chinese),2008,27(1):19-26.
[12]徐佩芬,刘福田,王清晨,等.大别-苏鲁碰撞造山带的地震层析成像研究—岩石圈三维速度结构[J].地球物理学报,2000,43(3):377-385.Xu P F,Liu F T,Wang Q C,et al.Seismic tomographybeneath the Dabie-Sulu collision orogen-3Dvelocity structuresof lithosphere[J].Chinese J.Geophys.(in Chinese),2003,46(3):377-385.
[13]杨文采.东大别超高压变质带的深部构造[J].中国科学(D),2003,33(2):183-194.Yang W C.Deep structure of ultrahigh-pressure metamorphicbelt in eastern Dabieshan mountains[J].Science in China(Series D)(in Chinese),2003,33(2):183-194.
[14]杨文采,方慧,程振炎,等.苏鲁超高压变质带北部地球物理调查(Ⅱ)—非地震方法[J].地球物理学报,1999,42(4):508-519.Yang W C,Fang H,Chen Z Y,et al.Geophysicalinvestigation of northern SULU UHPM terrane in East China(Ⅱ):Non-seismic methods[J].Chinese J.Geophys.(inChinese),1999,42(4):508-519.
[15]肖骑彬,赵国泽,詹燕,等.大别山超高压编制带深部电性结构及其动力学意义初步研究[J].地球物理学报,2007,50(3):812-822.Xiao Q B,Zhao G Z,Zhan Y,et al.A preliminary study onelectrical structure and dynamic of ultral-high pressuremetamorphic belt beneath the Dabie Moutains[J].Chinese J.Geophys.(in Chinese),2007,50(3):812-822.
[16]张交东,杨晓勇,刘成斋,等.大别山北缘深部结构的高精度重磁电震解析[J].地球物理学报,2012,55(7):2292-2306.Zhang J D,Yang X Y,Liu C Z,et al.The file deep structureof the northern margin of the Dabie Orogenic Belt fromgravity-magnetic-eldctrical-seismic combination survey[J].Chinese J.Geophys.(in Chinese),2012,55(7):2292-2306.
[17]徐如刚,张毅,王雷,等.九江-瑞昌MS5.7地震前后地磁场水平分量异常追踪与分析[J].地球物理学进展,2010,25(4):1175-1179.Xu R G,Zhang Y,Wang L,et al.Tracing and analyzinganomalies of horizontal geomagnetic component before andafter the MS5.7Jiujiang-Ruichang earthquake[J].Progressin Geophysics(in Chinese),2010,25(4):1175-1179.
[18]管志宁,郝天珧,姚长利.21世纪重力与磁法勘探的展望[J].地球物理学进展,2002,17(2):237-244.Guan Z N,Hao T Y,Yao C L.Prospect of gravity andmagnetic exploration in the 21st century[J].Progress inGeophysics(in Chinese),2002,17(2):237-244.
[19]刘天佑.位场勘探数据处理新方法[M].北京:科学出版社,2007.Liu T Y.New Process Method of Source Field ProspectingData[M](in Chinese).Beijing:Science Press,2007.
[20]刘天佑.重磁勘探软件手册(GMS3.0)方法原理[D].武汉:中国地质大学,2009.Liu T Y.Handbook of Gravity and Magnetic ProspectingSoftware and Principles of GMS3.0[D](in Chinese).Wuhan:China University of Geosciences,2009.
[21]虎喜凤,刘明涛,赵丽,等.豫北地区居里面与地震关系的研究[J].华北地震科学,2000,18(3):26-31.Hu X F,Liu M T,Zhao L,et al.Study of the relationshipbetween curie surface and earthquakes in north Henan[J].North China Earthquake Sciences(in Chinese),2000,18(3):26-31.
[22]张先,刘敏,赵丽等.华北地区居里温度面与地震活动的再研究[J].物探与化探,2000,24(2):81-86.Zhang X,Liu M,Zhao L,et al.Restudy of curietemperature interface and seismicity in north China.[J].Geophysical&Geochemical Exploration(in Chinese),2000,24(2):81-86.
[23]黄兆熊,高德章.上海及其邻域居里面与地震活动趋势[J].地震学报,1992,14(3):363-365.Huang Z X,Gao D Z.Curie temperature interface andseismicity in Shanghai and its adjacent areas[J].Geophysical&Geochemical Exploration(in Chinese),1992,14(3):363-365.
[24]邵世德,严晓红.安徽省及邻区居里面的地质分析[J].合肥工业大学学报(自然科学版),1992,15(2):100-105.Shao S D,Yan X H.Geological analysis curie temperaturesurface in Anhui Province and its adjacent areas[J].Journalof Hefei University of Technology(Natural Science)(inChinese),1992,15(2):100-105.
[25]徐树桐,袁学诚,吴维平,等.大别山黄石-六安反射地震剖面新的地质解释[J].地质通报,2008,27(1):19-26.Xu S T,Yuan X C,Wu W P,et al.New geologicalinterpretation of the seismic reflection rofile from Huangshi toLiu’an across the Dabie Montains,China[J].GeologicalBulletin of China(in Chinese),2008,27(1):19-26.
[26]Blakely R J.Potential Theory in Gravity and Magnetic Applications[M].New York:Cambridge University Press,1995.
[27]潘永信,朱日祥.大别山超高压变质岩带的岩石磁学和磁组构研究及其地质意义[J].岩石学报,2005,21(4):1101-1108.Pan Y X,Zhu R X.Rock magnetism and magnetic fabricstudies of the ultrahigh-pressure(UHP)metamorphic rocksfrom the Dabie organic belt,East-central China:implicationsfor retrograde metamorphism[J].Acta Petrologica Sinica(inChinese),2005,21(4):1101-1108.
[28]徐海军,金振民,欧新功,等.超高压榴辉岩退变质作用对岩石磁化率的影响[J].地球科学-中国地质大学学报,2004,29(6):674-684.Xue H J,Jin Z M,Ou X G,et al.Effects of retrogression ofUltrahigh-Pressure eclogites on magnetic susceptibility andanisotropy[J].Earth Science-Journal of China University ofGeosciences(in Chinese),2004,29(6):674-684.
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