| 陕甘宁青地区块体交接带上大地垂直形变演化特征与块体运动 |
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| 引用本文： | 巩守文.陕甘宁青地区块体交接带上大地垂直形变演化特征与块体运动[J].地球物理学报,1995,38(3):329-338. |
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| 作者姓名： | 巩守文 |
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| 作者单位： | 国家地震局第二地形变监测中心, 西安 710054 |
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| 摘 要： | 分析了关中、银川、西海固及民乐４个地区褶断隆起与断陷盆地组合构造带上的大地垂直形变演化特征．结果表明，１９７７年前后，鄂尔多斯西侧和南侧的大地垂直形变场变化与大华北应力场的消长过程密切相关．１９８３年以后，青藏块体边缘的民乐、西海固及银川地区继承性构造形变逐渐增大，在此背景下，１９８８年以来在亚板块内部及其边缘地区发生了一系列强震．从现今垂直形变场显示的时空结构来看，青藏亚板块和华北亚板块对交接带上的构造形变交替起着主导作用，并产生了不同的形变特征．
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| 关 键 词： | 块体交接带 大地垂直形变 平均升降差异 构造运动 有序性 |
EVOLUTIONAL CHARACTERISTICS OF CRUSTAL VERTICAL DEFORMATION IN CONJOINING ZONES OF MASSES AND MASSIVE MOVEMENT IN SHAAN-GAN-NING-QING AREA |
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| GONG SHOU-WEN.EVOLUTIONAL CHARACTERISTICS OF CRUSTAL VERTICAL DEFORMATION IN CONJOINING ZONES OF MASSES AND MASSIVE MOVEMENT IN SHAAN-GAN-NING-QING AREA[J].Chinese Journal of Geophysics,1995,38(3):329-338. |
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| Authors: | GONG SHOU-WEN |
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| Institution: | The Second Crustal Deformation Monitoring Center of SSB, Xian 710054 |
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| Abstract: | The four areas,Guanzhong,Yinchuan,Xihaigu and Minle,are in conjoining zones of the four subplates in China.The evolutional characteristics of crustal vertical deformation in combinational structure zones of fold uplift and rift basins in the four areas are analysed here.It shows that,round about 1977, the evolution of crustal vertical deformation in western and southern edges of Erduosi mass is closeig related to stress change in Huabei subplate.The strengthening of inherited tectonic movement in Minle,Xihaigu and Yinchuan areas after 1983 as well as a series of strong earthquakes in Qingzang subplate and its edge areas after 1988 have a close relation to stress strengthening of Qingzang subplate.The crustal deformation characteristics in the conjoining zones of the masses are mainly controlled by Qingzang subplate and Huabei subplate alternately. |
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| Keywords: | Conjoining zones of masses Crustal vertical deformation Average difference of elevation and subsidence Tectonic movement Ordinal character |
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