蒙古南戈壁中央弧形回春山系变形扩展机制研究

弧形构造是陆内构造变形最为显著和强烈的地区，对其几何学、运动学特征及动力学来源的研究是揭示陆内变形扩展机制的关键所在。蒙古南戈壁中央弧形回春山系控制着研究区块体的运动形式以及陆内造山带的构造组成、构造关系和构造样式。然而对其研究工作深入不够。本项目以申请者在南戈壁开展的博士论文研究工作为基础，以青藏高原隆升引起的外围大范围陆内变形扩展的远程效应这一假设理论目标，选取蒙古“南戈壁弧形构造系统”为主要研究对象，综合该系统弧顶“南戈壁中央山系”本身的主要三列变形带和南北两侧地区出露的中、新生代地层单元的构造分析为途径，开展包括变形带构造解析、中新生代地层单元古地磁剖面测量、弧顶前缘变形中生代盆地热年代学工作，获取新数据、提出新认识，以建立南戈壁中央弧形构造系统陆内造山的构造回春机制、区域运动学响应并探讨其扩展方式与构造演化。

Arcuate Structure found in the intense intra-continental deformation zone usually shows considerable geometric complexity and study on arcuate structure, focusing on geometry kinematic characteristic, geodynamic and deformation phases, can provide significant information of structure evolution for a complex orogen. The arcuate reactivated mountain in South Gobi has an important position for the development of the intra-continent structural deformation. However, its effects on the intra-continental deformation have been poorly-studied.. Based on our existing geological investigation and Ph.D. thesis research work, the main task of this project will be designed for analyzing the arcuate structure deformation. By means of the detailed profiling, combined with systematic analysis of structural deformation, geochronology and paleomagnetic of the arcuate structure, accordingly, this project aims to reconstruct geometry, kinematics and propagation mechanism of intra-continent deformation. Undoubtedly, the results of this project could provide new constraints on the intra-continent tectonic evolution of the South Gobi.