Analogue Modeling of Fold-and-Thrust Structures Based on Particle Image Velocimetry （PIV)

详细信息   

• 责任者：Shen Li (Institute of Energy Sciences ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Jia Dong
• 刊名：Geological Review
• 出版年：2012
• 卷期：58(3)
• 关键词：褶皱冲断带 ; fold and thrust belts ; 构造模拟实验 ; experiment of tectonic simulation
• 页码：p.471-480
• 图表：4 illus., 30 refs.
• 分类号：0300
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

摘要

In order to study the kinematics and mechanism of the fold-and-thrust belts, the authors designed and finished three types of sandbox experiments. Each model included two detachments in different depths. And writers calculated the displacement fields in the model sections in the processes of the experiments using particle image velocimetry （PIV） technique, to get a better understanding of the kinematics. The results indicate that the deep detachment dominated the structure and evolution of the fold-and-thrust belt, and locally shallow structure was controlled by the upper detachment. This conclusion was demonstrated by comparing the modeling results with the natural example in the south segment of the fold-and-thrust belt in Longmen Mountains. PIV analysis suggests that the deformation was characterized by parallel shortening of the sand layers.