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赣东北矿集区含金建造双桥山群主要由双桥山上亚群、双桥山下亚群组成。其中 ,下亚群是在被动大陆边缘基础上形成的早期伸张体系的碎屑沉积建造 ,上亚群为大陆边缘的火山沉积建造。本文利用分形理论研究了双桥山群金含量的分维数结构特征 ,并对其含金性进行了评价 ,初步探讨了双桥山群赋存矿床类型、矿床作用与其分形结构特征之间的关系。研究表明 :赣东北矿集区含金建造具有明显的分形特征 ,在 ( 0 6～ 2 50 )× 1 0 - 9范围内 ,具有标度自相似性。双桥山群、双桥山上亚群、双桥山下亚群的分维数特征值分别为 0 5838、 0 4 1 2 5、 1 5642。结合矿床的种类、矿床的成因类型、形成时代和岩浆活动的关系 ,可知 :分维数越小 ,越有利于金的活化、迁移 ,易形成独立式金矿床 ,即双桥山上亚群赋存独立式金矿床的可能性比双桥山下亚群要大。
The gold-bearing Shuangqiaoshan Group in the gold mining area in the northeastern Jiangxi province consists of the Shuangqiao Group and the Shuangqiao Group. Among them, the lower subgroup is formed by the deposition of clastic sediments of the early extensional system formed on the basis of the passive continental margin, and the upper subgroup is built by volcanic deposits on the continental margin. In this paper, fractal theory was used to study the fractal dimension structure of gold content in Shuangqiao Mountain Group, and its gold content was evaluated. The relationship between the type of deposit deposit and the function of the Shuangqiaoshan Group and its fractal features relationship. The results show that the gold deposits in the coal concentration area in northeastern Jiangxi have obvious fractal characteristics and scale self - similarity in the range of (0 6 ~ 2 50) × 10 ~ 9. The fractal dimension of Shuangqiao group, Shuangqiao group and Shuangqiao group are 0 5838, 0 4 1 2 5 and 1 5642, respectively. According to the type of deposit, the type of deposit, the age of formation and the relationship between magmatism and activity, we can see that the smaller the fractal dimension is, the more conducive to the activation and migration of gold and the easy formation of independent gold deposit. The possibility of a free-standing gold deposit is greater than that of the Shuangqiaoshan sub-group.