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南秦岭房县拉分盆地的构造发育特征
TECTONIC DEVELOPMENT FEATURES OF FANGXIAN PULL-APART BASIN OF SOUTH QINLING
【摘要】 南秦岭新生代房县盆地是北西向安康 竹山 房县左旋走滑断裂构造带东南端拉分盆地。论述了该盆地边界断裂、盆地结构和 3期盆地发育演化特征。估算盆地的最大扩张量为 2 .73km ,主控边界断裂的走滑位错量为3.5 7km ,并分析了盆地主要储能结构与地震的关系。
【Abstract】 The Fangxian basin of Cenozoic Era of South Qinling is a pull-apart basin at the southeastern end of the Ankang-Zhushan-Fangxian NW-trending left-lateral strike-slip fault zone.The boundary faults,basin structure and development and evolution features in three periods of this basin are described.The maximum expansion of this basin is estimated as 2.73 km,the strike-sliping dislocation of its principal boundary fault is 3.57 km and the relation of main energy-reserving structure of the basin with the earthquakes is analyzed as well.
【关键词】 房县拉分盆地;
构造形变;
地震;
南秦岭;
【Key words】 Fangxian pull-apart basin; tectonic deformation; earthquake; South Qinling;
【Key words】 Fangxian pull-apart basin; tectonic deformation; earthquake; South Qinling;
【基金】 地震科学联合基金 ( 880 15 )《南秦岭造山带走滑断裂、拉分盆地与地震活动研究》课题资助
- 【文献出处】 大地测量与地球动力学 ,Crustal Deformation and Earthquake , 编辑部邮箱 ,2003年04期
- 【分类号】P544.4
- 【被引频次】7
- 【下载频次】175