赣东北金山金矿床金品位分维结构及深部预测

Fractal dimension structure of Jinshan gold deposit and its application in deep ore prediction in northeast Jiangxi province

赣东北金山金矿床23个钻孔金品位空间分布的研究表明，金品位分布具有很好的标度不变性，即具有分形分布的特征，并且具有双重分维结构。建立的品位一分维模型表明，矿化大多集中在分维值为0．5左右，分维值趋近于1时，金往往出现极高品位；而分维值大于1时，金矿化较弱。双重分维结构中的D1值反映了石英脉型矿石的分形特征，D2则有可能指示蚀变糜棱岩矿化类型的分形特征。根据分维结构的规律，预测了在301～309线及321～329线深部具有很好的找矿前景。

According to the fractal study of gold grade spatial distribution in the 23 drill holes of Jinshan gold deposit, we can conclude that the distribution of gold grade possesses a characteristic of scale invariability and there are dual fractal dimensions in most drill holes. The model of gold grade and fractal dimension shows that the gold mineralization concentrates in the fractal dimensions value near 0.5, the high gold grade concentrates in the value near I and the gold mineralization is weak when the value exceeds 1. The value of D1 probably indicates the fractal characteristic of quartz vein-type orebody, corresponding, the value of D2 possibly represents that of the altered mylonite orebody. Based on the regularity of the fractal dimension structure, the deep part of exploration line 301 to 309 and line 321 to 329 is predicted to have great prospecting potential.