甘青块体东西部运动分界带的确定
|
摘要
通过研究用1999~2004年多期GPS观测资料计算获得的青藏块体东北缘地壳水平运动图像发现:甘青块体可分为东部块体和西部块体,它们的运动状态存在明显的差异,2001年11月14日昆仑Ms8.1地震后,其差异表现得尤为明显。进一步结合地质、地球物理资料确定了分界带的位置:分界带的整体走向为北东向;北部位于金昌与武威之间;中部在祁连山东部、门源以西;南部位于德令哈以东青海湖以西的地方。并对形成这种运动态势的机制进行了探讨。
Having studied GPS data observed from 1999 to 2004, we find that the Gansu-Qinghai block can be divided into two parts and the movement of east part is different from the west. After Ms8.1 Kunlun earthquake the difference becomes more clear. The position of the boundary belt is determined with the geological and geophysical data.It turns out that the strike of boundary belt is NE; Its northern part lies between Jinchang and Wuwei,its middle part lies in the east of Qilianshan mountain and the west to Menyuan,its southern part lies in the east of Delinha and the west to Qinghai lake.At last the mechanism of crustal movement is discussed.
Having studied GPS data observed from 1999 to 2004, we find that the Gansu-Qinghai block can be divided into two parts and the movement of east part is different from the west. After Ms8.1 Kunlun earthquake the difference becomes more clear. The position of the boundary belt is determined with the geological and geophysical data.It turns out that the strike of boundary belt is NE; Its northern part lies between Jinchang and Wuwei,its middle part lies in the east of Qilianshan mountain and the west to Menyuan,its southern part lies in the east of Delinha and the west to Qinghai lake.At last the mechanism of crustal movement is discussed.
引文
1向宏发,虢顺民,陈志泰,等.祁连块体的旋转运动与区域地震活动的时空分布[A].中法合作活断层对比研究[C].北京:地震出版社,1993.1Xiang Hongfa,Guo Shunmin,Chen Zhitai,et al.Rotational movement of the Qilian block and the regional time-space distribution of earthquakes[A].Comparison studying of ac-tive faults on China-France cooperation[C].Beijing:Seismo-logical Press,1993.(in Chinese)
2徐锡伟,程国良,马杏垣,等.华北及其邻区旋转模式和块体动力来源[J].地球科学—中国地质大学学报,1994,19(2):129~138.2Xu Xiwei,Cheng Guoliang,Ma Xingyuan,et al.Rotation model and dynamics of blocks in north China and its adja-cent areas[J].Earth Science-Journal of China University of Geosciences,1994,19(2):129-138.(in Chinese)
3江在森,张希,崔笃信,等.青藏块体东北缘近期水平运动与形变[J].地球物理学报,2001,44(5):639~644.3Jiang Zaisen,Zhang Xi,Cui Duxin,et al.Recent horizontal movement and deformation in the northeast margin of Qing-hai-Tibet block[J].Chinese Journal of Geophysics,2001,44(5):639-644.(in Chinese)
4王庆良,等.青藏块体东北缘现今地壳运动[J].大地测量与地球动力学,2002,22(4):12~16.4Wang Qingliang,et al.The nowadays crustal movement innortheastern margin of Qinghai-Tibet block[J].Journal of Geodesy and Geodynamics,2002,22(4):12-16.(in Chi-nese)
5崔笃信,等.青藏块体东北缘地壳水平运动状态[J].大地测量与地球动力学,2004,24(3):29~34.5Cui Duxin,et al.Crustal horizontal movement state of north-eastern margin of Qinghai-Tibet block[J].Journal of Geode-sy and Geodynamics,2004,24(3):29-34.(in Chinese)
6张晓亮,等.青藏块体东北缘地壳运动与孕震特征[J].大地测量与地球动力学,2004,24(4):76~81.6Zhang Xiaoliang,et al.Recent horizontal movement and seis-mogenic features of northeastern margin of Qinghai-Tibet[J].Journal of Geodesy and Geodynamics,2004,24(4):76-81.(in Chinese)
7张晓亮,等.青藏东北缘现今块体的划分、运动及变形的初步研究[J].大地测量与地球动力学,2002,22(1):63~67.7Zhang Xiaoliang,et al.Preliminary research on present block demarcation,movement and deformation in northeast margin[J].Journal of Geodesy and Geodynamics,2002,22(1):63-67.(in Chinese)
8牛之俊,等.中国地壳运动速率场[J].大地测量与地球动力学,2003,23(3):4~8.8Niu Zhijun,et al.Velocity fields of crust movement of China[J].Journal of Geodesy and Geodynamics,2003,23(3):4-8.(in Chinese)
9Okada Y.Surface deformation due to shear and tensile faults in a half-space[J].Bull,Seismol.Soc.Am.,1985,75:1135-1154.
10中国地震局《中国岩石圈动力学图集》编委会.中国岩石圈动力学图集[M].北京:中国地图出版社,1989.10Editorial Board for Lithospheric Dynamics Atlas of China,CEA.Lithospheric dynamics atlas of China[M].Beijing:Cartopraphic Publishing House of China,1989.(in Chi-nese)
11国家地震局地质研究所和兰州地震研究所.祁连山-河西走廊活动断裂系[M].北京:地震出版社,1993.11Geological Institute of State Seismological Bureau&Lanzhou Seismological Institute.Active fault systems of Qilian Mountain-Hexi corridor region[M].Beijing:Seis-mological Press,1993.(in Chinese)
12国家地震局鄂尔多斯块体周边活动断裂系研究组.鄂尔多斯块体周边活动断裂系[M].北京:地震出版社,1988.12Research Group of Active Fault System Along the Border of Erdos Block,CEA.Active fault system along the border of Erdos block[M].Beijing:Seismological Press,1988.(in Chinese)
2徐锡伟,程国良,马杏垣,等.华北及其邻区旋转模式和块体动力来源[J].地球科学—中国地质大学学报,1994,19(2):129~138.2Xu Xiwei,Cheng Guoliang,Ma Xingyuan,et al.Rotation model and dynamics of blocks in north China and its adja-cent areas[J].Earth Science-Journal of China University of Geosciences,1994,19(2):129-138.(in Chinese)
3江在森,张希,崔笃信,等.青藏块体东北缘近期水平运动与形变[J].地球物理学报,2001,44(5):639~644.3Jiang Zaisen,Zhang Xi,Cui Duxin,et al.Recent horizontal movement and deformation in the northeast margin of Qing-hai-Tibet block[J].Chinese Journal of Geophysics,2001,44(5):639-644.(in Chinese)
4王庆良,等.青藏块体东北缘现今地壳运动[J].大地测量与地球动力学,2002,22(4):12~16.4Wang Qingliang,et al.The nowadays crustal movement innortheastern margin of Qinghai-Tibet block[J].Journal of Geodesy and Geodynamics,2002,22(4):12-16.(in Chi-nese)
5崔笃信,等.青藏块体东北缘地壳水平运动状态[J].大地测量与地球动力学,2004,24(3):29~34.5Cui Duxin,et al.Crustal horizontal movement state of north-eastern margin of Qinghai-Tibet block[J].Journal of Geode-sy and Geodynamics,2004,24(3):29-34.(in Chinese)
6张晓亮,等.青藏块体东北缘地壳运动与孕震特征[J].大地测量与地球动力学,2004,24(4):76~81.6Zhang Xiaoliang,et al.Recent horizontal movement and seis-mogenic features of northeastern margin of Qinghai-Tibet[J].Journal of Geodesy and Geodynamics,2004,24(4):76-81.(in Chinese)
7张晓亮,等.青藏东北缘现今块体的划分、运动及变形的初步研究[J].大地测量与地球动力学,2002,22(1):63~67.7Zhang Xiaoliang,et al.Preliminary research on present block demarcation,movement and deformation in northeast margin[J].Journal of Geodesy and Geodynamics,2002,22(1):63-67.(in Chinese)
8牛之俊,等.中国地壳运动速率场[J].大地测量与地球动力学,2003,23(3):4~8.8Niu Zhijun,et al.Velocity fields of crust movement of China[J].Journal of Geodesy and Geodynamics,2003,23(3):4-8.(in Chinese)
9Okada Y.Surface deformation due to shear and tensile faults in a half-space[J].Bull,Seismol.Soc.Am.,1985,75:1135-1154.
10中国地震局《中国岩石圈动力学图集》编委会.中国岩石圈动力学图集[M].北京:中国地图出版社,1989.10Editorial Board for Lithospheric Dynamics Atlas of China,CEA.Lithospheric dynamics atlas of China[M].Beijing:Cartopraphic Publishing House of China,1989.(in Chi-nese)
11国家地震局地质研究所和兰州地震研究所.祁连山-河西走廊活动断裂系[M].北京:地震出版社,1993.11Geological Institute of State Seismological Bureau&Lanzhou Seismological Institute.Active fault systems of Qilian Mountain-Hexi corridor region[M].Beijing:Seis-mological Press,1993.(in Chinese)
12国家地震局鄂尔多斯块体周边活动断裂系研究组.鄂尔多斯块体周边活动断裂系[M].北京:地震出版社,1988.12Research Group of Active Fault System Along the Border of Erdos Block,CEA.Active fault system along the border of Erdos block[M].Beijing:Seismological Press,1988.(in Chinese)
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