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鄂尔多斯地块北缘动力背景和现今地震活动特征
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  • 英文篇名:Dynamic Background and Present Seismic Activity Characteristics in the Northern Margin of the Ordos Block
  • 作者:高立新 ; 戴勇 ; 陈立峰 ; 李拴虎 ; 杨红樱 ; 梁沙沙
  • 英文作者:GAO Lixin;DAI Yong;CHEN Lifeng;LI Shuanhu;YANG Hongying;LIANG Shasha;Seismological Bureau of Inner Mongolia Autonomous Region;
  • 关键词:鄂尔多斯地块 ; 动力背景 ; 地震活动 ; 特征
  • 英文关键词:Ordos block;;dynamic background;;seismic activity;;characteristic
  • 中文刊名:DKXB
  • 英文刊名:Journal of Geodesy and Geodynamics
  • 机构:内蒙古自治区地震局;
  • 出版日期:2017-07-15
  • 出版单位:大地测量与地球动力学
  • 年:2017
  • 期:v.37
  • 基金:内蒙古自治区科技厅2016年科技重大专项~~
  • 语种:中文;
  • 页:DKXB201707002
  • 页数:7
  • CN:07
  • ISSN:42-1655/P
  • 分类号:12-18
摘要
鄂尔多斯地块的动力背景是青藏高原东北缘NE向推挤作用的结果。1970年以来,鄂尔多斯地块北缘现今地震活动表明,中强地震活动具有幕式活动特征,从1970~2015年共经历了4幕活动;块体西北缘与东北缘的中强地震具有迁移对跳活动特征,1970年以来共经历了4组对跳;震例统计结果揭示,地块北缘6.0级左右地震前,块体中等地震经历长时间平静具有普适特征;2005-03以来,块体所在的阴山地震带再次进入中等地震超长平静时段。其幕式活动特征、迁移特征、时间平静特征可作为区域范围强震的预测指标。
        The research results show that dynamic background of the Ordos block is the Tibetan plateau compression from an East-West direction.The seismic activity of the Ordos block northern margin since 1970 shows that the moderate seismicity is characterized by episodic activities;moderate earthquakes of Ordos block experienced 4 curtains from 1970 to 2015,strong earthquakes of the northwestern and northeastern margins of the Ordos block has migrating characteristics,a total of 4 curtains since 1970,(before the magnitude 6 earthquake in the northern margin of the block).The moderate earthquake of the entire block has been quiet a long time according to the statistical results of earthquake examples,while moderate seismic is in a long quiet stage in Yinshan seismic zone since March 2005.The curtain activity and migrating characteristics,as well as the time calm characteristics,can be used as a prediction index for strong earthquakes in the region.
引文
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