Tóm tắt:

This paper present a preliminary result of the application of digital elevation model (DEM) and Shaded Relief Image in interpretation geological structure of the Dien Bien area. The application of this data set has led to the identification of lineaments and recognition of correlation between the lineaments and geological structures directed in the study area. The interpreted lineaments derived from various enhancing techniques show that the lineaments trend in east south (ESE) – west north west (WNW), south south east (SSE) – north north west (NNW), north north east (NNE) – south south west (SSW), and east north east (ENE) – west south west (WSW) directions. The interpreted lineament map demonstrates that the NNE-SSW system is correlated with the Dien Bien - Lai Chau fault system, which is interpreted as a strike-slip structure. It is also visualized that the Cenozoic pull-apart basin formed by extensional tectonics along the fault is dominated in this area. The results of this study also demonstrate that mapping of structural features using DEM can provide adequate geological information dependent on scale of interest and data quality.