分形理论在焦家金矿床深部预测中的应用

The Fractal Theory in Metallogenic Prediction at Depth of Jiaojia Gold Deposit,Shandong

焦家金矿床位于胶东西北部的招掖成矿带内,西临著名的郯庐大断裂。矿体赋存于NNE-NE向延伸的断裂破碎蚀变带中,受控于断裂构造,围岩蚀变以钾长石化(红化)、黄铁绢英岩化、硅化、碳酸盐化为特征。本文运用分形理论研究了Ⅰ、Ⅱ、Ⅲ号主矿体的品位、厚度、品位厚度乘积的分维值在垂向上的变化特征,根据分维值D的规律性变化,提出该矿床深部三个主要矿体仍有较大延伸。

Jiaojia Gold Deposit is located in the Zhaoyuan - Yexian gold belt in northwest Shandong Peninsula, which is bordered on the well -known Tancheng -Luzhong fault belt in the west. Gold mineralization was developed in the NNE - and NE - trending altered - fractured zones. The alterations are characterized by K -feldsparization, pyretic -phyllic alteration, silicification, and carbonation. The fractal theory results calculated describes the vertical variation of grade, thickness and grade multiplication thickness in gold mineralization, from which the extending at depth for the orebodies is inferred.