公元600年秦陇地震考证与发震构造探讨
|
摘要
公元600年12月16日,甘肃天水与陕西陇县一带,发生1次强烈地震,造成严重的震害及社会影响。长期以来,对公元600年秦陇地震的确切震级、震中位置、震中烈度的认识存在分歧,对该次地震的发震构造不甚明确。秦陇地区位于南北地震带的北段,在构造上处于鄂尔多斯块体西南缘与青藏块体东北部的祁连断褶带之间的过渡地带。对公元600年秦陇地震详细考证,对其发震构造进行探讨,对于评定秦陇地区的地震活动性、分析其未来地震危险性有重要意义。本文收集有关公元600年秦陇地震的相关史料及研究成果,发现一些新的可能与该次地震有关的佐证资料,通过史料考证及震害分析,推断公元600年秦陇地震震中应在天水陇县之间,更靠近陇县的陕西境内,震中烈度达IX度,震级634级左右,本次地震极震区长轴方位大致与陇县-宝鸡断裂带相吻合。经过野外实地考察,综合分析认为,公元600年秦陇634级地震的发震构造为固关-县功断裂带的八渡-龙尾段。
A.D.600 December 16,a strong earthquake occurred in an area including Tianshui,Gansu Province and Longxian,Shaanxi Province,which caused serious damage and social impact.For a long time,there were different understandings of its exact magnitude,epicenter and epicentral intensity,the seismogenic structure was also unclear.The Qin-Long area was a transitional zone between the southwestern margin of the Ordos block and the Qilian fault fold belt of northeastern Qinghai-Tibet block.It was significant to detailedly study A.D.600 Qin-Long earthquake and discuss its seismogenic structure.The historical datum on A.D.600 Qin-Long earthquake were collected and the previous works done by other scholars were also consulted.In Addition,A few of supporting information that was possibly related to this earthquake was discovered.Through studying the historical datum and analyzing the damages on this earthquake,the epicenter of A.D.600 Qin-Long earthquake may located between Tianshui and Longxian,which is closer to the latter.Its epicentral intensity was inferred as IX and magnitude was about 6 3 4.The orientation of the long axis of the meizoseismal area was roughly consistent with LongxianBaoji fault zone.By conducting the field investigation and comprehensively analyzing datum of this earthquake,the seismogenic structure of A.D.600 Qin-Long earthquake may be concluded as Badu-Longwei segment of Guguan-Xiangong fault zone.
A.D.600 December 16,a strong earthquake occurred in an area including Tianshui,Gansu Province and Longxian,Shaanxi Province,which caused serious damage and social impact.For a long time,there were different understandings of its exact magnitude,epicenter and epicentral intensity,the seismogenic structure was also unclear.The Qin-Long area was a transitional zone between the southwestern margin of the Ordos block and the Qilian fault fold belt of northeastern Qinghai-Tibet block.It was significant to detailedly study A.D.600 Qin-Long earthquake and discuss its seismogenic structure.The historical datum on A.D.600 Qin-Long earthquake were collected and the previous works done by other scholars were also consulted.In Addition,A few of supporting information that was possibly related to this earthquake was discovered.Through studying the historical datum and analyzing the damages on this earthquake,the epicenter of A.D.600 Qin-Long earthquake may located between Tianshui and Longxian,which is closer to the latter.Its epicentral intensity was inferred as IX and magnitude was about 6 3 4.The orientation of the long axis of the meizoseismal area was roughly consistent with LongxianBaoji fault zone.By conducting the field investigation and comprehensively analyzing datum of this earthquake,the seismogenic structure of A.D.600 Qin-Long earthquake may be concluded as Badu-Longwei segment of Guguan-Xiangong fault zone.
引文
[1]顾功叙.中国地震目录[M].北京:科学出版社,1983:7-8.Gu Gongxu.Catalogue of Chinese earthquakes[M].Beijing:Science Press,1983:7-8.
[2]国家地震局兰州地震研究所.陕甘宁青四省(区)强地震目录[M].西安:陕西科技出版社,1985:10.Lanzhou Institute of Seismology,SSB.Catalogue of strong earthquakes in Shaanxi,Gansu,Ningxia and Qinghai Provinces or region[M].Xi'an:Shaanxi Science and Technology Press,1985:10.
[3]国家地震局震害防御司.中国历史强震目录[M].北京:地震出版社,1995:6-13.Earthquake Disaster Prevention Department,SSB.Catalogue of Chinese strong historical earthquakes[M].Beijing:Seismological Press,1995:6,12-13.
[4]谢毓寿,蔡美彪.中国地震历史资料汇编[M].第1卷.北京:科学出版社,1983:73-74.Xie Yushou,Cai Meibiao.Compilation of China earthquake historical da-ta[M].First volume.Beijing:Science Press,1983:73-74.
[5]闫文儒.麦积山石窟[M].兰州:甘肃人民出版社,1984.Yan Wenru.Maijishan grotto[M].Lanzhou:Gansu People Press,1984.
[6]孙昭民,邓起东.六盘山东麓断裂和陇县-宝鸡断裂带基本特征及其相互关系[C]//中国地震学会地震地质专业委员会.中国活动断层研究.北京:地震出版社,1994:114-125.Sun Zhaomin,Deng Qidong.Basic characteristics and interaction of the eastern Liupanshan piedmont fault and the Longxian-baoji fault zone[C]//Seismogeology Professional Committee,Seismological Society of China.China Active Fault Research.Beijing:Seismological Press.1994:114-125.
[7]李传友,张培震,袁道阳,等.活动走滑断裂上断塞塘沉积特征及其构造含义[J].地质学报,2010,84(1):90-105.Li Chuanyou,Zhang Peizhen,Yuan Daoyang,et al.Acta Geologica Sini-ca,2010,84(1):90-105.
[2]国家地震局兰州地震研究所.陕甘宁青四省(区)强地震目录[M].西安:陕西科技出版社,1985:10.Lanzhou Institute of Seismology,SSB.Catalogue of strong earthquakes in Shaanxi,Gansu,Ningxia and Qinghai Provinces or region[M].Xi'an:Shaanxi Science and Technology Press,1985:10.
[3]国家地震局震害防御司.中国历史强震目录[M].北京:地震出版社,1995:6-13.Earthquake Disaster Prevention Department,SSB.Catalogue of Chinese strong historical earthquakes[M].Beijing:Seismological Press,1995:6,12-13.
[4]谢毓寿,蔡美彪.中国地震历史资料汇编[M].第1卷.北京:科学出版社,1983:73-74.Xie Yushou,Cai Meibiao.Compilation of China earthquake historical da-ta[M].First volume.Beijing:Science Press,1983:73-74.
[5]闫文儒.麦积山石窟[M].兰州:甘肃人民出版社,1984.Yan Wenru.Maijishan grotto[M].Lanzhou:Gansu People Press,1984.
[6]孙昭民,邓起东.六盘山东麓断裂和陇县-宝鸡断裂带基本特征及其相互关系[C]//中国地震学会地震地质专业委员会.中国活动断层研究.北京:地震出版社,1994:114-125.Sun Zhaomin,Deng Qidong.Basic characteristics and interaction of the eastern Liupanshan piedmont fault and the Longxian-baoji fault zone[C]//Seismogeology Professional Committee,Seismological Society of China.China Active Fault Research.Beijing:Seismological Press.1994:114-125.
[7]李传友,张培震,袁道阳,等.活动走滑断裂上断塞塘沉积特征及其构造含义[J].地质学报,2010,84(1):90-105.Li Chuanyou,Zhang Peizhen,Yuan Daoyang,et al.Acta Geologica Sini-ca,2010,84(1):90-105.
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