安徽霍山地区断层活动习性研究的新进展
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摘要
通过霍山地区地震地质调查和研究,发现晚第四纪以来该地区丰富的构造变形现象:盆地边缘断裂构成断层三角面;隆起区发育一系列的北东向断裂,含断层泥;盆地内中更新统中发现多期变形遗迹,共同显示晚第四纪以来构造变形的继承性和统一性.文中结合各观测点变形物质的微观、超微观变形分析和断错物质系统测龄结果分析,对研究区构造新活动期次、断层滑移特性、古地震事件等进行了有意义的探讨.结果表明,该区断裂在晚第四纪曾有过多期粘滑活动.最后结合地震层析成像等深部探测成果对研究区地震的深部介质条件进行了讨论.
By means of carrying out investigation and research of seismology and geology,in Huoshan area,Anhui Province,the author found abundant deformational phenomenon since the Later- Quaternary,which the fault of the basin edge constituted fault trigonal plane,a series of faults trending NE and including fresh gouge developed in ridgy area,local deformation occurred in the the Middle Pleistocene in the Huoshan basin.The current deformational relics of the faults show that tectonic deformation since the Later- Quaternary in the area has continuity and oneness.Based on micro- ultramicroscopic deformation analysis and systematic dating results of fault materials on different observation spots,the author discussed the identifications about the tectonic activity frequency,the sliding behavior and palaeoearthquake events.The results show that there are many times stick creep events have taken place in the area during the Later- Quaternary.Combining with results of deep detection such as seismic tomography,the author carried out discussion of the deep medium conduction of the earthquake in the research area at last.
By means of carrying out investigation and research of seismology and geology,in Huoshan area,Anhui Province,the author found abundant deformational phenomenon since the Later- Quaternary,which the fault of the basin edge constituted fault trigonal plane,a series of faults trending NE and including fresh gouge developed in ridgy area,local deformation occurred in the the Middle Pleistocene in the Huoshan basin.The current deformational relics of the faults show that tectonic deformation since the Later- Quaternary in the area has continuity and oneness.Based on micro- ultramicroscopic deformation analysis and systematic dating results of fault materials on different observation spots,the author discussed the identifications about the tectonic activity frequency,the sliding behavior and palaeoearthquake events.The results show that there are many times stick creep events have taken place in the area during the Later- Quaternary.Combining with results of deep detection such as seismic tomography,the author carried out discussion of the deep medium conduction of the earthquake in the research area at last.
引文
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[9]冯文科.大别山地区构造地貌特征[J].地质科学,1976,(3):266~276.FEN Wen-ke.Character of morph structure in Dabie Mountainarea[J].Science Geological Sinica,1976,(3):266~276.
[10]董树文,孙先如,张勇,等.大别山碰撞造山带基本结构[J].科学通报,1993,38(6):542~545.DONG Shi-wen,SUN Xian-ru,ZHANG Yong,et al.Thebasic tectonics of collision orogen in Dabie Mountain[J].Chi-nese Science Bulletin,1993,38(6):542~545.
[11]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 Jie,SHEN Xiao-qi,WANG Xing-zhouet al.Dis-cussion on deep tectonic backgrounds of moderate-strongearthquake in Anhui and its neighboring region by using re-sults of seismic tomography[J].Earthquake Research in Chi-na,2005,21(3):350~359.
[12]YOU Zhen-dong,SUO Shu-tian,ZHONG Zen-qiu,et al.The extensional tectonics and retrometamorphic processessubsequent to the high-pressure and ultralhigh-pressure meta-morphic events in Dabieshan[J].China.Continental Dynam-ics,1998,3(1~2):63~71.
[13]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 Pei-fen,LIU Fu-tian,WABG Qing-chen et al.2000.Thestudy of Seismic tomography in collision orogen of Dabie-Su-lu—three-dimension crust velocity levels in lithosphere[J].Chinese Journal of Geophysics,43(3):377~385.
[2]姚大全,李杰.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 Da-quan,,LI Jie.A synthetical study on active behaviorof fault in bedrock area of northeastern Dabie mountain[J].Seismology and Geology,1999,21(1):63~68.
[3]姚大全,刘家灿.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 Da-quan,LIU Jia-can.Seismic activities and structuresof the Luan-Huoshan seismic risk area[J].Seismology and Ge-ology,2003,25(2):211~219.
[4]冉勇康,邓起东.古地震研究历史、现状和发展趋势[J].科学通报,1999,44(1):12~20.RUAN Yong-kang,DENG Qi-dong.The history,status anddevelopment trend on Paleoearthquake’s research[J].ChineseScience Bulletin,1999,44(1):12~20.
[5]姚大全,汤有标,李杰,等.活动断裂带上粘滑与蠕滑标志及其研究意义[J].地球物理学进展,1993,8(4):140~148.YAO Da-quan,TAN You-biao,LI Jie.Marks of stick slip andcreep slippage on active fault zone and their significance[J].Progress in Geophysics,1993,8(4):140~148.
[6]姚大全,李杰.不同围压条件下岩石破裂实验变形物质中粘滑和蠕滑微观标志研究[J].实验力学,1998,13.(2):247~252.YAO Da-quan,,LI Jie.Research on microscopic indicators ofsliding behavior in deformation materials of rock breaking ex-periment under different pressure conditions[J].ExperimentMechanics.1998,13(2):247~252.
[7]YAO Da-quan,LIU Jia-can.,LI Jie.Microscopic indicators ofsliding behavior from rock deformation experiments at differenttemperatures[J].Geol.Soc.Malaysia,Bulletin,1998,42:227~235
[8]YAO Da-quan,CHU Yu-cheng,LI Xue-zheng,et al.Micro-scopic textures in rocks deformed by chemical explosion andexperimental stick-slip as a guide to conditions of palaeoseis-micity[J].Journal of Asian Esrth Sciences.2000,18:33~39.
[9]冯文科.大别山地区构造地貌特征[J].地质科学,1976,(3):266~276.FEN Wen-ke.Character of morph structure in Dabie Mountainarea[J].Science Geological Sinica,1976,(3):266~276.
[10]董树文,孙先如,张勇,等.大别山碰撞造山带基本结构[J].科学通报,1993,38(6):542~545.DONG Shi-wen,SUN Xian-ru,ZHANG Yong,et al.Thebasic tectonics of collision orogen in Dabie Mountain[J].Chi-nese Science Bulletin,1993,38(6):542~545.
[11]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 Jie,SHEN Xiao-qi,WANG Xing-zhouet al.Dis-cussion on deep tectonic backgrounds of moderate-strongearthquake in Anhui and its neighboring region by using re-sults of seismic tomography[J].Earthquake Research in Chi-na,2005,21(3):350~359.
[12]YOU Zhen-dong,SUO Shu-tian,ZHONG Zen-qiu,et al.The extensional tectonics and retrometamorphic processessubsequent to the high-pressure and ultralhigh-pressure meta-morphic events in Dabieshan[J].China.Continental Dynam-ics,1998,3(1~2):63~71.
[13]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 Pei-fen,LIU Fu-tian,WABG Qing-chen et al.2000.Thestudy of Seismic tomography in collision orogen of Dabie-Su-lu—three-dimension crust velocity levels in lithosphere[J].Chinese Journal of Geophysics,43(3):377~385.
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