摘要
本文研究了北秦岭造山带不同时代、不同环境下形成的岩石变形记录,从构造组合出发,论述了北秦岭造山带以褶皱构造组合,右行韧性剪切构造组合为主要特征。褶皱构造组合表现为热软化褶皱构造,流动褶皱构造,扇形构造、同斜一平卧褶皱构造。在北秦岭造山过程中,宏观—微观构造在平面上表现为右行韧性剪切,在剖面上表现为剪切推覆构造组合。不同的褶皱构造组合与不同的推覆岩片之间的空间配置反映它们生成环境的差异,表明该造山作用席卷到地壳不同层次的物质变形作用。
The North Qinling Orogenic Belt is an immense mountain chain resulted only from northward single-side subduction and following collision of Qinling ocean in early Paleozoic. This paper studies the deformation records of rocks formed in different time and different conditions in the mountain chain. In view of tectonic deformation assemblages, the paper indicates that the orogenic Belt is dominatly characterized by its fold structural assemblage and dextral ductility shear nappe assemblage. They reflect a variety of deformation and its environments in the orogenic belt . Deformation experiments of microstructures and flowing folds and temperatures determined by original mineral inclusions show that deformation of this orogenic belt were developedin the middle and middle-upper crust.
出处
《地质科学》
CAS
CSCD
北大核心
1992年第A12期37-49,共13页
Chinese Journal of Geology(Scientia Geologica Sinica)
关键词
造山带
褶皱构造
变形
形成环境
North Qinling orogenic blet, fold structural assemblage, shear nappe assemblage
