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2001年以来,在巴颜喀喇地块周缘相继发生2001年昆仑山口西8.1级地震、2008年汶川8.0级地震、2010年玉树7.1级地震、2012年芦山7.0级地震等。对比分析昆仑山口西8.1级地震前、后相同时间长度内,与其地球动力学上相关区域的地震应变释放强度变化特征,发现该地震发生之后,龙门山地区、巴塘地区、温泉盆地西侧南北向谷地的地震应变释放明显增强,第一个地区发生了汶川地震,第二个地区与玉树地震的发生相关,说明巴颜喀喇地块北边界东昆仑断裂带上发生地震破裂后,其南侧的物质向东南运移,将构造变形集中在龙门山构造带上,并在其上发生破裂。该震例说明基于地震地质背景分析、找出的地球动力学上相关联的地震活动增强区域是中长期破坏性地震的易发区。2014年2月12日新疆于田发生MS7.3地震后,阿尔金断裂带东部与祁连山构造带交汇地区的地震频度和地震应变释放明显增强,该区域的中长期地震危险性值得关注。
Since 2001, an earthquake of magnitude 8.1 on the west of the Kunlun Mountain Pass, a 2008 Wenchuan M8.0 earthquake, a 2010 Yushu M7.1 earthquake, and a Lushan M (subscript S) 7.0 7.0 earthquake have all occurred on the periphery of the Bayan Kara block. The characteristics of seismic strain release intensity in the same region before and after the west Kunlun Mountain Pass M8.1 earthquake are compared with those in the geodynamically related regions of the Kunlun Mountain Pass. It is found that after the earthquake occurred, the Longmenshan region, Batang region, The seismic strain release to the valley was significantly enhanced. The Wenchuan earthquake occurred in the first area and the second occurred with the occurrence of the Yushu earthquake, indicating that after the earthquake rupture occurred on the east Kunlun fault zone of the northern boundary of the Bayan Kara Block, On the side of the material to the southeast migration, the structural deformation will be concentrated in the Longmen Shan tectonic belt, and on it rupture. The earthquake example shows that the geodynamically related enhanced seismic activity based on the analysis of seismo-geological backgrounds is an easy-to-occur area for long-term and long-term destructive earthquakes. After the MS7.3 earthquake in Yutian, Xinjiang on February 12, 2014, the seismic frequency and seismic strain release in the junction of the eastern Altyn Tagh and the Qilian tectonic belt have been significantly enhanced. The risk of medium and long-term earthquakes in this area deserves our attention.