塔源地区遥感解译线性构造定量分析

Quantitative Analysis of Linear Structures for Remote Sensing Interpretation in Tayuan Area

为了定量描述研究区内线性构造特征并揭示构造的内在联系,基于概率论的数理统计方法,以ENVI、ARCGIS、SURFER为平台,对遥感解译到的塔源地区线性构造长度、方位、数量及密度进行定量分析,得到线性构造的相关图件,分析了各图件所体现的线性构造地质意义。得出以下结论:①40°～50°(NE)以及130°～140°(NW)为研究区线性构造产出的最优方位;②研究区内线性构造呈带状分布的高值区大多与区域内主要的大型构造方向一致,即与主要的褶皱及断裂构造有关;③区内线性构造的走向大体呈NE及NW向的空间展布规律,与区内大的断裂构造分布格局基本一致。

In order to quantitatively describe the linear structural features in the study area and reveal the intrinsic relationship be. tween the structures,this paper based on the mathematical theory of probability theory with ENVI,ARCGIS,SURFER as the plat. form,the linear structure length of the Tayuan area interpreted by remote sensing,The quantitative analysis of the orientation,quanti. ty and density is carried out to obtain the relevant maps of the linear structure,and the geological significance of the linear structure embodied by each map is analyzed. Finally,we reached the following conclusions:① 40°~50°(NE)and 130°~140°(NW)are the op. timal azimuths for the linear structure of the study area;② the linear structure of the study area is banded. Most of the value areas are consistent with the main large-scale structural directions in the area,that is,they are related to the main folds and fault structures;③ the linear structure of the area is generally in the spatial distribution pattern of NE and NW,and is large in the area. The fracture struc. ture distribution pattern is basically the same.