华南多层推滑构造系的物理模拟实验  

Physical Simulation Experiments on the Multilayer Nappe-Detachment Structure System in South China

作　　者：彭美丽[1,2,3] 易金[1,3] 姚蓉[1,3] 吴川 朱江建[1,3] 王岳军[5] 孙珍[6] 林舸[1] 

机构地区：[1]中国科学院广州地球化学研究所边缘海地质重点实验室,广东广州510640 [2]华东有色金属地质勘查局资源调查与评价研究院,江苏南京210007 [3]中国科学院研究生院,北京100049 [4]重庆市地质矿产研究院,重庆400042 [5]中国科学院广州地球化学研究所同位素年代学和地球化学重点实验室,广东广州510640 [6]中国科学院南海海洋研究所边缘海地质重点实验室,广东广州510301

出　　处：《大地构造与成矿学》2011年第2期198-206,共9页Geotectonica et Metallogenia

基　　金：中国科学院知识创新工程重要方向项目:华南中生代构造变形系统及其动力学机理研究( KZCX2-YW-128-4)资助

摘　　要：利用物理模拟的方法,研究华南多层推滑构造系的变形特征、变形过程和力学机制。在实验室条件下,根据实际地质条件,物理模拟实验再现了多层推滑构造系的形成和演化过程;论证了岩石能干性差异和岩系能干性结构对变形产生的影响。在挤压应力背景下,岩石发生逆冲推覆,能干性层在非能干性层上滑脱、变形,形成断坪-断坡逆冲推覆变形构造。由于非能干性层易发生塑性流变,具有很好的调节变形的作用,使得滑脱面上下的能干性层的变形各具特色。By the method of physical simulation, the deformation characteristics, mechanisms and kinetics of the muhilayer nappe-detachment structure system in South China are researched in this paper. The formation and evolution of the multilayer nappe-detachment structure system were simulated by the structure physical experiment un- der conditions similar to the actual geological situations. The results show that contrast in relative competency and thickness ratio of strata with different competency are important for the formation of muhilayer nappe-detachment structure system in South China. Under compressive stress, thrust nappe develops, and the competent layers slip and deform on the non-competent layers to form flat-ramp-flat fault geometry and fault relative fold. The non-competent layer is susceptible to plastic deformation and plays a very important role in regulating disharmonic deformation by material redistribution, so layers with different competent commonly have distinct deformation features.

关 键 词：物理模拟实验 多层推滑构造系 滑脱面 华南 

分 类 号：P548[天文地球—构造地质学] P554[天文地球—地质学]