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地质通报  2009 

西准噶尔野鸭沟地区褶皱冲断构造的特征及意义

, PP. 1894-1903

Keywords: 西准噶尔,野鸭沟,褶皱冲断带

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Abstract:

西准噶尔地区的褶皱冲断带多被认为是向东南逆冲的。在东部野鸭沟发育的褶皱冲断构造中识别出顶端指向北西的褶皱组合。褶皱自北西向南东逐渐由直立褶皱转变为斜歪褶皱,最后褶皱北西翼发生倒转而倾向南东,表明它们的极性指向北西;褶皱翼间角也由110°转变为60°左右,显示野鸭沟褶皱自北西向南东变形程度逐渐增强。根据卷入褶皱冲断带最年轻的地层为石炭系,又被307Ma的闪长岩穿切的事实,认为该褶皱冲断带形成于晚石炭世的顶端指向北西的剪切环境。

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