安徽省矿点分布与主要形迹相关性的分形研究

Fractal study on correlation between distribution of ore spots and main traces in Anhui

安徽省成矿地质条件优越,种类多分布广,运用分形理论对257处矿点、3条水系和主要断裂进行了分形计算,寻找出杂乱无章的矿点分布与主要形迹的相关性。研究表明:安徽省矿点分布的分维值为1.3371,相关系数R2=0.9817,矿点分布具有显著的分形特征;安徽省总体水系的分维值为1.5825,长江水系分维值为1.331,分维值在1.3~1.4的水系有利于成矿;安徽省断裂分维值为1.5684,当断裂分维值大于1.4时,对应矿点分布的高分维区,为矿点受断裂构造影响最强烈区,表明该处为断裂构造控矿模式。

Anhui has distinguished metallogenic geological environment and various metallogenic types are widely distributed.On the basis of fractal theory,the fractal dimension values of 257 ore spots,3 water systems and main faults are calculated respectively to figure out the correlation between distribution of ore spots and main traces.The conclusions are as following.Firstly,distribution of ore spots in Anhui is characterized by fraction.Its fractal dimension value is 1.3371 and the correlation coefficient R2 is 0.9817.Secondly,the fractal dimension value of the overall water system in Anhui is 1.5825 and that of Yangtze River system is 1.331.This value ranging from 1.3 to 1.4 is conducive to mineralization.Thirdly,the fractal dimension value of faults in Anhui is 1.5684.Such value greater than 1.4 corresponds to high dimensional regions of ore spots most affected by faults and shows that these regions follow the fault controlling metallogenic model.