佛子冲铅锌矿田线性构造的分形特征

利用ASTER GDEM数字高程模型(DEM)作为数据源,以线段追踪算法(STA)提取了佛子冲铅锌矿田的线性构造,并采用计盒维数法计算了各个区段相应的线性构造分维值,然后做出了线性构造分维等值线图。结果显示该区域线性构造具有良好的统计自相似性和分形特征,线性构造分维值的高低反映了线性构造展布结构的复杂程度。已知铅锌矿床(点)主要分布在高分维值区或附近,表明线性构造分维值可以作为线性构造发育程度与成矿属性的重要参数。

Fractal characteristics of lineament in Fozichong lead-zinc district

Based on the ASTER GDEM Digital Elevation Model (DEM) data in Fozichong lead-zinc district, Segment Tracking Algorithm (STA) is used to extract lineaments, and box-counting method is used to calculate the fractal dimension values of lineaments in every sub areas. Then the contour map of lineament fractal dimensions in Fozichong lead-zinc district is drawn. From the results, lineaments showed obvious statistical self-similarity and fractal characteristics, and the values of fractal dimension reflect the complexity of lineament distribution. As explored, known lead-zinc depositsare mainly distributed in or near the high fractal dimension value zones, indicating that the fractal value of lineaments can be regarded as an important parameter of lineament development intensity and metallogenetic specialization.