党河南山北缘断裂古地震形变带特征研究
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摘要
通过对党河南山北缘断裂的野外地貌考察,发现东段保存了长约40km的古地震地表形变带,主要表现为纹沟和高漫滩断错,形成高约0.5m左右的低矮断层陡坎,且活动时代较新。经查阅相关史料和文献,结合最新冲积地貌面的估算年代,推测该地震形变带可能与公元384年、419年、1000年和1297—1303年发生在敦煌附近的4次地震中的某一次地震有关。
Through field investigation we found a 40km-long seismic surface rupture zone, along central and eastern segment of northern margin fault of Danghe Nanshan in Gansu. The fault rupture zone offset the high floodplain of river and the uplift is about 0.5 m. Since the deposits of the high floodplain are young, so that it is reasonable to believe that the active time of the rupture zone was close to the present. According to various historical records and related documents, we identified that four earthquakes had occurred in the vicinity of this fault, and the four historical earthquakes occurred in 384 A.D., 419 A.D., 1000 A.D. and 1297-1303 A.D. respectively. Finally we inferred that the rupture zone may be related to one of the four earthquakes given above.
Through field investigation we found a 40km-long seismic surface rupture zone, along central and eastern segment of northern margin fault of Danghe Nanshan in Gansu. The fault rupture zone offset the high floodplain of river and the uplift is about 0.5 m. Since the deposits of the high floodplain are young, so that it is reasonable to believe that the active time of the rupture zone was close to the present. According to various historical records and related documents, we identified that four earthquakes had occurred in the vicinity of this fault, and the four historical earthquakes occurred in 384 A.D., 419 A.D., 1000 A.D. and 1297-1303 A.D. respectively. Finally we inferred that the rupture zone may be related to one of the four earthquakes given above.
引文
樊锦诗,1993.敦煌莫高窟的保存、维修和展望.见:敦煌研究文集——石窟保护篇(上).兰州:甘肃民族出版社,4—6.
顾功叙主编,1983.中国地震目录.北京:科学出版社.
国家地震局兰州地震研究所,1985.陕甘宁青四省(区)强地震目录.西安:陕西科学技术出版社,9.
国家地震局《阿尔金活动断裂带》课题组,1992.见:阿尔金活动断裂带.北京:地震出版社,1—194.
国家地震局兰州地震研究所,1999.甘肃省地震资料汇编.北京:地震出版社,20.
谢毓寿,蔡美彪,1989.中国地震历史资料汇编.北京:科学出版社,20—50.
徐锡伟,Tapponnier P.,Van Der Woerd等,2003.阿尔金断裂带晚第四纪左旋走滑速率及其构造运动转换模式讨论.中国科学(D辑),33(10):967—974.
赵朋,2009.肃北地区主要断裂晚第四活动特征研究[硕士学位论文].中国地震局地质研究所.
Meyer B.,Tapponnier P.,Bourjot L.et al.,1998.Crustal thickening in Gansu-Qinghai,lithospheric mantle subduction,and oblique,strike-slip controlled growth of the Tibet Plateau.Geophys J.Int.,135:1—47.
Wells D.L.,Coppersmith K.J.,1994.Empirical relationships among magnitude,rupture length,rupture width,rupture area,and surface displacement.Bull.Seism.Soc.Am.,84(4):974—1002.
Woerd J.Vander,Xiwei X.,Haibing L.et al.,2001.Rapid active thrusting along the north-western range front of the Tanghe Nan Shan(western Gansu,China).J.Geophys.Res.,106:30,475—30,504.
Zhang P.Z.,Molnar P.,Xu X.W.,2007.Late quaternary and present-day rates of slip along the Altyn Tagh Fault,northern margin of the Tibetan Plateau.Tectonics,26:TC5010,doi:10.1029/2006TC002014.
顾功叙主编,1983.中国地震目录.北京:科学出版社.
国家地震局兰州地震研究所,1985.陕甘宁青四省(区)强地震目录.西安:陕西科学技术出版社,9.
国家地震局《阿尔金活动断裂带》课题组,1992.见:阿尔金活动断裂带.北京:地震出版社,1—194.
国家地震局兰州地震研究所,1999.甘肃省地震资料汇编.北京:地震出版社,20.
谢毓寿,蔡美彪,1989.中国地震历史资料汇编.北京:科学出版社,20—50.
徐锡伟,Tapponnier P.,Van Der Woerd等,2003.阿尔金断裂带晚第四纪左旋走滑速率及其构造运动转换模式讨论.中国科学(D辑),33(10):967—974.
赵朋,2009.肃北地区主要断裂晚第四活动特征研究[硕士学位论文].中国地震局地质研究所.
Meyer B.,Tapponnier P.,Bourjot L.et al.,1998.Crustal thickening in Gansu-Qinghai,lithospheric mantle subduction,and oblique,strike-slip controlled growth of the Tibet Plateau.Geophys J.Int.,135:1—47.
Wells D.L.,Coppersmith K.J.,1994.Empirical relationships among magnitude,rupture length,rupture width,rupture area,and surface displacement.Bull.Seism.Soc.Am.,84(4):974—1002.
Woerd J.Vander,Xiwei X.,Haibing L.et al.,2001.Rapid active thrusting along the north-western range front of the Tanghe Nan Shan(western Gansu,China).J.Geophys.Res.,106:30,475—30,504.
Zhang P.Z.,Molnar P.,Xu X.W.,2007.Late quaternary and present-day rates of slip along the Altyn Tagh Fault,northern margin of the Tibetan Plateau.Tectonics,26:TC5010,doi:10.1029/2006TC002014.
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