南秦岭石泉—汉阴北部金矿带黄铁矿形貌及分形学特征

Morphology and Fractal Characteristics of Pyrite in Northern Shiquan-Hanyin Gold Belt in South Qinling

黄铁矿是最普遍和最重要的载金矿物。本文从黄铁矿形貌特征和分形学特征两个方面研究了南秦岭石泉-汉阴北部金矿带中的黄铁矿。按形貌特征和分形学,黄铁矿可以分为三期,其中和金富集成矿关系最密切的是第Ⅱ期,最明显的特征是呈半自形粒状集合体沿片岩的主体面理产出,且采用P-A分形模型得出,分形维数DAP在1.351 2左右的黄铁矿的岩石含金量高,一般能达到金矿床的工业品位。

Pyrite is the most common and most important gold bearing mineral. This paper studied the pyrites in Shiquan-Hanyin gold belt in South Qinling from 2 aspects which were morphology and fractal characteristics. According to the morphology characteristics and the fractal characteristic, the pyrites can be divided into three phases, and the pyrites closing to the enrichment of Au belong to phase Ⅱ, featuring that this type is subhedral aggregation and settled down along the schistosity plane, according to the P-A fractal model, the pyrite with DAP of 1.351 2 has high gold content, which can reach the industrial grade of gold deposit.