基于钻探的芦花台隐伏断层晚第四纪活动特征
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摘要
芦花台断层是银川盆地内一条重要的隐伏构造。在浅层地震勘探成果的基础上,开展了钻孔联合剖面探测和钻孔样品测试,获得了断层上断点埋深、最新活动时代、晚第四纪累计位移和滑动速率等数据。结果表明:芦花台隐伏断层北段和南段的活动性不同,南段为中更新世末活动断层,北段为全新世活动断层;在北段内,断层活动强度在空间上表现为由北向南增强,在时间上表现为晚更新世活动强于全新世。
Luhuatai Fault is one of the important buried tectonics in Yinchuan Basin.Based on the results of shallow seismic exploration,we conducted composite drilling section exploration and dating of the samples of borehole.Some useful data of the fault were obtained,such as the depth of upper breaking point,the latest activity age,displacement in late Quaternary,and slip rates,etc.This study shows that the activity is different between the north and south segment along Luhuatai Fault.The north segment is a Holocene fault,while the south segment is a late mid-Pleistocene fault.From north to south along the north segment of Luhuatai Fault,the activity has enhanced,and the faulting is stronger in late Pleistocene than Holocene.
Luhuatai Fault is one of the important buried tectonics in Yinchuan Basin.Based on the results of shallow seismic exploration,we conducted composite drilling section exploration and dating of the samples of borehole.Some useful data of the fault were obtained,such as the depth of upper breaking point,the latest activity age,displacement in late Quaternary,and slip rates,etc.This study shows that the activity is different between the north and south segment along Luhuatai Fault.The north segment is a Holocene fault,while the south segment is a late mid-Pleistocene fault.From north to south along the north segment of Luhuatai Fault,the activity has enhanced,and the faulting is stronger in late Pleistocene than Holocene.
引文
柴炽章,孟广魁,杜鹏,等.2006.隐伏活动断层的多层次综合探测:以银川隐伏活动断层为例[J].地震地质,28(4):536—544.CHAI Chi-zhang,MENG Guang-kui,Du Peng,et al.2006.Comprehensive multi-level exploration of buried active fault:An example of Yinchuan buried active fault[J].Seismology and Geology,28(4):536—544(in Chinese).
邓起东.2002.城市活断层探测和地震危险性评价问题[J].地震地质,24(4):601—605.DENG Qi-dong.2002.Exploration of active faults and their seismic hazard assessmens[J].Seismology and Geology,24(4):601—605(in Chinese).
邓起东,徐锡伟,张先康,等.2003.城市活断层探测的方法和技术[J].地学前缘,10(1):150—162.DENG Qi-dong,XU Xi-wei,ZHANG Xian-kang,et al.2003.Methods and techniques for surveying and prospecting ac-tive faults in urban areas[J].Earth Science Frontiers,10(1):150—162(in Chinese).
方盛明,张先康,刘宝金,等.2002.探测大城市活断层的地球物理理论方法[J].地震地质,24(4):606—613.FANG Sheng-ming,ZHANG Xian-kang,LIU Bao-jin,et al.2002.Geophysical methods for exploration of urban active faults[J].Seismology and Geology,24(4):606—613(in Chinese).
方盛明,赵成彬,柴炽章,等.2009.银川断陷盆地地壳结构与构造的地震学证据[J].地球物理学报,52(7):1768—1775.FANG Sheng-ming,ZHAO Cheng-bin,CHAI Chi-zhang,et al.2009.Seismic evidence of crustal structures in the Yin-chuan Faulted Basin[J].Chinese J Geophys,52(7):1768—1775(in Chinese).
国家地震局“鄂尔多斯周缘活动断裂系”课题组.1998.鄂尔多斯周缘活动断裂系[M].北京:地震出版社.The Reseach Group on Active Fault System around Ordos Massif,SSB.1998.Active Fault System around Ordos Massif[M].Seismological Press,Beijing(in Chinese).
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雷启云,柴炽章,孟广魁,等.2008.银川隐伏断层钻孔联合剖面探测[J].地震地质,30(1):250—262.LEI Qi-yun,CHAI Chi-zhang,MENG Guang-kui,et al.2008.Composite drilling section exploration of Yinchuan buried fault[J].Seismology and Geology,30(1):250—262(in Chinese).
孟广魁,王增光,廖玉华,等.1994.银川平原地震区划研究[M].银川:宁夏人民出版社.MENG Guang-kui,WANG Zeng-guang,LIAO Yu-hua,et al.1994.Yinchuan Plain Earthquake Regionalization Research[M].Ningxia People's Publishing House,Yinchuan(in Chinese).
向宏发,方仲景,张晚霞,等.1993.北京平原区隐伏断裂晚第四纪活动性的初步研究[J].地震学报,15(3):385—388.XIANG Hong-fa,FANG Zhong-jing,ZHANG Wan-xia,et al.1993.Preliminary study of late Quaternary activities of bur-ied faults in the Beijing Plain area[J].Acta Seismologica Sinica,15(3):385—388(in Chinese).
向宏发,王学潮,虢顺民,等.2000.聊城-兰考隐伏断裂第四纪活动性的综合探测研究[J].地震地质,22(4):351—359.XIANG Hong-fa,WANG Xue-chao,GUO Shun-min,et al.2000.Integrated survey and investigation on the Quaternary activity of the Liaocheng-Lankao buried fault[J].Seismology and Geology,22(4):351—359(in Chinese).
徐锡伟,计凤桔,于贵华,等.2000.用钻孔地层剖面记录恢复古地震序列:河北夏垫断裂古地震研究[J].地震地质,22(1):9—19.XU Xi-wei,JI Feng-ju,YU Gui-hua,et al.2000.Reconstruction of paleo-earthquake sequence using stratigraphic re-cords from drill logs:A study at the Xiadian Fault,Beijing[J].Seismology and Geology,22(1):9—19(in Chi-nese).
袁道阳,王兰民,何文贵,等.2008.兰州市地震活断层探测新进展[J].地震地质,30(1):236—249.YUAN Dao-yang,WANG Lan-min,HE Wen-gui,et al.2008.New progress of seismic active fault prospecting in Lanzhou city[J].Seismology and Geology,30(1):236—249(in Chinese).
张世民,王丹丹,刘旭东,等.2008.北京南口-孙河断裂晚第四纪古地震事件的钻孔剖面对比与分析[J].中国科学(D辑),38(7):881—895.ZHANG Shi-min,WANG Dan-dan,LIU Xu-dong,et al.2008.Using borehole core analysis to reveal late Quaternary pa-leoearthquakes along the Nankou-Sunhe Fault,Beijing[J].Science in China(Ser D),38(7):881—895(in Chinese).
中国地震局.2005.中国地震活断层探测技术系统技术规程[M].北京:地震出版社.China Earthquke Administration.2005.Stipulation on Technical System for China Earthquake Active Fault Surverying[M].Seismological Press,Beijing(in Chinese).
邓起东.2002.城市活断层探测和地震危险性评价问题[J].地震地质,24(4):601—605.DENG Qi-dong.2002.Exploration of active faults and their seismic hazard assessmens[J].Seismology and Geology,24(4):601—605(in Chinese).
邓起东,徐锡伟,张先康,等.2003.城市活断层探测的方法和技术[J].地学前缘,10(1):150—162.DENG Qi-dong,XU Xi-wei,ZHANG Xian-kang,et al.2003.Methods and techniques for surveying and prospecting ac-tive faults in urban areas[J].Earth Science Frontiers,10(1):150—162(in Chinese).
方盛明,张先康,刘宝金,等.2002.探测大城市活断层的地球物理理论方法[J].地震地质,24(4):606—613.FANG Sheng-ming,ZHANG Xian-kang,LIU Bao-jin,et al.2002.Geophysical methods for exploration of urban active faults[J].Seismology and Geology,24(4):606—613(in Chinese).
方盛明,赵成彬,柴炽章,等.2009.银川断陷盆地地壳结构与构造的地震学证据[J].地球物理学报,52(7):1768—1775.FANG Sheng-ming,ZHAO Cheng-bin,CHAI Chi-zhang,et al.2009.Seismic evidence of crustal structures in the Yin-chuan Faulted Basin[J].Chinese J Geophys,52(7):1768—1775(in Chinese).
国家地震局“鄂尔多斯周缘活动断裂系”课题组.1998.鄂尔多斯周缘活动断裂系[M].北京:地震出版社.The Reseach Group on Active Fault System around Ordos Massif,SSB.1998.Active Fault System around Ordos Massif[M].Seismological Press,Beijing(in Chinese).
江娃利.2001.北京平原夏垫断裂潘各庄钻孔晚更新世晚期以来古地震事件分析[A].见:中国地震局地质研究所编.活动断裂研究(8).北京:地震出版社.140—147.JIANG Wa-li.2001.Paleoearthquake analysis of the Xiadian Fault since the late period of late Pleistocene from Pan-gezhuang boring in Beijing plain[A].In:Institute of Geology,SSB(ed).Research on Active Fault(8).Seismo-logical Press,Beijing.140—147(in Chinese).
雷启云,柴炽章,孟广魁,等.2008.银川隐伏断层钻孔联合剖面探测[J].地震地质,30(1):250—262.LEI Qi-yun,CHAI Chi-zhang,MENG Guang-kui,et al.2008.Composite drilling section exploration of Yinchuan buried fault[J].Seismology and Geology,30(1):250—262(in Chinese).
孟广魁,王增光,廖玉华,等.1994.银川平原地震区划研究[M].银川:宁夏人民出版社.MENG Guang-kui,WANG Zeng-guang,LIAO Yu-hua,et al.1994.Yinchuan Plain Earthquake Regionalization Research[M].Ningxia People's Publishing House,Yinchuan(in Chinese).
向宏发,方仲景,张晚霞,等.1993.北京平原区隐伏断裂晚第四纪活动性的初步研究[J].地震学报,15(3):385—388.XIANG Hong-fa,FANG Zhong-jing,ZHANG Wan-xia,et al.1993.Preliminary study of late Quaternary activities of bur-ied faults in the Beijing Plain area[J].Acta Seismologica Sinica,15(3):385—388(in Chinese).
向宏发,王学潮,虢顺民,等.2000.聊城-兰考隐伏断裂第四纪活动性的综合探测研究[J].地震地质,22(4):351—359.XIANG Hong-fa,WANG Xue-chao,GUO Shun-min,et al.2000.Integrated survey and investigation on the Quaternary activity of the Liaocheng-Lankao buried fault[J].Seismology and Geology,22(4):351—359(in Chinese).
徐锡伟,计凤桔,于贵华,等.2000.用钻孔地层剖面记录恢复古地震序列:河北夏垫断裂古地震研究[J].地震地质,22(1):9—19.XU Xi-wei,JI Feng-ju,YU Gui-hua,et al.2000.Reconstruction of paleo-earthquake sequence using stratigraphic re-cords from drill logs:A study at the Xiadian Fault,Beijing[J].Seismology and Geology,22(1):9—19(in Chi-nese).
袁道阳,王兰民,何文贵,等.2008.兰州市地震活断层探测新进展[J].地震地质,30(1):236—249.YUAN Dao-yang,WANG Lan-min,HE Wen-gui,et al.2008.New progress of seismic active fault prospecting in Lanzhou city[J].Seismology and Geology,30(1):236—249(in Chinese).
张世民,王丹丹,刘旭东,等.2008.北京南口-孙河断裂晚第四纪古地震事件的钻孔剖面对比与分析[J].中国科学(D辑),38(7):881—895.ZHANG Shi-min,WANG Dan-dan,LIU Xu-dong,et al.2008.Using borehole core analysis to reveal late Quaternary pa-leoearthquakes along the Nankou-Sunhe Fault,Beijing[J].Science in China(Ser D),38(7):881—895(in Chinese).
中国地震局.2005.中国地震活断层探测技术系统技术规程[M].北京:地震出版社.China Earthquke Administration.2005.Stipulation on Technical System for China Earthquake Active Fault Surverying[M].Seismological Press,Beijing(in Chinese).
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