遥感解译线性构造与地质构造对比研究

Comparative Study of Remote Sensing Interpreted Lineament and Geological Structure

遥感线性构造是地质构造场在地表及光谱特征上的反映,线性构造解译是遥感应用研究领域中一个很重要的研究方向。本次研究采用Landsat ETM+遥感影像,对遥感影像开展了线性构造解译,并区分出一级线性构造和二级线性构造,线性构造长度-频数的双对数直方图,发现其形态接近正态分布,说明线性构造的长度分布是随机的,解译的结果可信度比较高。为进一步验证遥感线性构造解译的正确性,对研究区地质图矢量化,并对地质构造进行方位、频数分布统计,结果得出地质构造长度、频数分布与一级、二级线性构造长度、频数图基本一致,构造方向均以EW向和NE-SW向为主。其中东西向总体线性构造分布略多于NE-SW向,与研究区构造格架一致。

The remote sensing lineament is the reflection of geological structural field on surface and spectral features.Lineament interpretation is an important research orientation in remote sensing application field.The research has used Landsat ETM+remote sensing images carried out lineament interpretation,and discriminated first-order and second-order lineaments.The lineament length-frequency double logarithmic histogram configuration close to normal distribution has indicated the lineament length distribution is randomly,interpreted result has higher reliability.To further verify correctness of remote sensing lineament interpretation,has vectorized study area geological map,and carried out geological structure azimuth,frequency distribution statistics.The results have shown that the geological structure length,frequency distribution are basically consistent with length,frequency of first-order,second-order lineaments,structural directions are all mainly EW and NE-SW,and EW total lineament distribution slightly more than NE-SW,consistent with study area structural framework.