摘要
新疆的新构造运动强烈,各大山系主体显示了断块抬升运动,而两大盆地则表现为相对下沉。分布在山系与盆地交接部位的大型活动断裂和强烈的地震活动有密切的联系。为了解新疆地壳形变的面貌,我们利用50年代至今30多年的精密水准测量资料,绘制了新疆垂直形变速率等值线图。图中清晰地反映了最新构造运动的形态,以及与地质构造的关系。南、北天山交汇的部位是北西向构造带与东西向构造带的汇合部,也是垂直形变速率等值线密度最大的地段。高速隆起与下降相伴生,今后10年内这里是大地震的潜在危险区。
In Xinjiang, the violent movement of the neotectonics had caused the blocks in each large mountain system uplifting and two basins sinking, with this the author believed that this large scale motion in active faults located in the convergent area of the mountain system and the basins must have some certain and close relations with seismicities. In order to prove it and get a wholeview of the crustal deformation in Xinjiang, He made .a best use of the data on precise level survey (from early fifties till now )to draw up an isogram of vertical deformation rate in Xinjiang, in which the state of the neotectonic movement, the geological structures and their relations are described clearly. It is finally indicated that the convergent area of south & north Tianshan is exactly the conjunction place of northwest & eastwest tectonic belts and the maximum density place of vertical deformation rate isograms, The high speed of uplift accompanied with the quick subsidence suggests a sign of potential danger area of great shocks in this decade.
出处
《内陆地震》
1993年第2期136-141,共6页
Inland Earthquake
关键词
新疆
地壳形变
地震
构造运动
Xinjiang Haxilegen Crustal deformation Differential motion Seismic danger area
