西昆仑山北麓新生代前陆褶皱冲断带构造特征与变形机制定量研究

项目名称： 西昆仑山北麓新生代前陆褶皱冲断带构造特征与变形机制定量研究

项目编号： No.41272227

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 尹宏伟

作者单位： 南京大学

项目金额： 94万元

中文摘要： 西昆仑造山带及其相邻的沉积盆地是研究新生代构造变形的关键地区之一。本区晚新生代以来持续发生的山脉隆升扩展、山麓构造变形、山前盆地迁移是印度板块与欧亚大陆碰撞在陆内腹地的构造响应,对理解印度-欧亚板块碰撞机制及其远程效应具有深刻意义。西昆仑山北麓新生代褶皱冲断带形成时代新，构造地质现象丰富，保存完整，是开展褶皱冲断构造系统变形样式与变形机制研究的理想场所。本项目拟通过地表构造调查、地球物理资料综合解释、结合构造物理模拟实验和离散元数值模拟，精细解剖、定量研究西昆仑山北麓不同区段的新生代构造特征、变形时空分布规律及其控制因素，探讨新生代西昆仑山山体隆升扩展-山麓构造变形-山前盆地迁移的相互关系，为西昆仑山盆山体系动力学机制研究提供地质证据和构造信息，同时为本区及其他前陆褶皱冲断带的油气勘探与开发提供理论指导。

中文关键词： 西昆仑山北麓；褶皱冲断带；构造变形；物理模拟；离散元模拟

英文摘要： The West Kunlun orogenic belt and the adjacent sedimentary basin are critical for the study on the Cenozoic structural deformation. The continuous process of the uplift and expansion of the mountain, the structural deformation in the piedmont, and the migration of the forland basin is the intra-continental tectonic response of the collision between India and Euroasia plates. It is highly significant for the understanding on the mechanism and remote effect of India and Euroasia plate collision. The Cenozoic fold-and-thrust belts in the northern piedmont of western Kunlun Shan are new strctures with abundant structural features, and are well preserved. They are ideal subjects for the systematic study of the deformation patterns and deformation mechanism of fold-and-thrust belts. We propose to do a quantitative research on the Cenozoic structural features, the evolution of the deformation, and its controlling factors. And we are going to discuss the relationship between the uplift and expansion of the mountain, the structural deformation in the piedmont, and the migration of the foreland basin. Results from this project will provide geological evidence and structural insights for the research on the dynamics of the West Kunlun Shan mountain and basin system. In addition, results from this project will provide theor

英文关键词： The northern piedmont of West Kunlun Shan；Fold-and-thrust belt；Structural deformation；Physical modeling；Discrete-element modeling