秦岭陆内造山带岩石圈结构

qiang · 发表于 2010-7-19 11:45

秦岭陆内造山带岩石圈结构

袁学诚　李善芳　华九如　

摘　要：重新处理和解释叶县-南漳反射地震剖面,并综合利用油气勘探地震剖面,地震层析、大地电磁测深、地热流、气体测量等地球物理和地球化学数据,得到秦岭造山带岩石圈构造模型.识别出秦岭地壳不同时代的重要构造

1)加里东期华北克拉通向秦岭微板块的俯冲,并造成中上地壳内华北地壳和北秦岭地壳形成锯齿状楔入构造.(2)印支-燕山期扬子克拉通与秦岭微陆块的对冲走滑软碰撞,形成了以南阳地区为中心由一系列规模宏大的逆冲断层组成的负花状构造.(3)白垩纪后,由正副片麻岩交互成层的结晶基底形成的穹隆.(4)盖在结晶基底上的近透明浅变质元古宙地层形成的褶皱基底.白垩纪后,秦岭地区和中国东部其他地区一样,岩石圈地幔遭受到软流圈上升形成蘑菇云构造,岩石圈活化,严重影响构造演化过程.
关键词：秦岭;岩石圈;反射地震;气体测量;大地电磁;地热流
分类号：P542 　文献标识码：A
文章编号：1000-3657(2008)01-0001-17

Lithospheric structure of the Qinling intracontinental orogen

YUAN Xue-cheng　 LI Shan-fang　 HUA Jiu-ru　

基金项目：国土资源部专项计划项目(20010103)资助.
作者简介：袁学诚,男,1928年生,教授级高级工程师,主要从事深部地球物理研究;E-mail:xcyuan@263.net.cn.
作者单位：袁学诚（中国地质调查局发展研究中心,北京,100037）　
　　　　　李善芳（中国地质调查局发展研究中心,北京,100037）　
　　　　　华九如（中国地质调查局发展研究中心,北京,100037）　

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