山东寺庄金品位参数统计和分形特征及其对矿化信息

Application of Indicating Function of Parameter Statistics and Fractal Characteristic to Mineralization Information in Sizhuang

摘要:

采集寺庄金矿区82个钻孔的金品位数据4597个，按照100m的标度分析其在垂向上的均值、标准差、变异系数和大于工业品位的矿石所占比例等统计参数，对比其在垂向上的分形分维值特征，发现如下规律：寺庄金矿区深部矿体明显优于浅部矿体，以700～800m区间为矿化中心，垂直分布至少500m以上；通过围岩蚀变分带特征、矿石组合特征、井下脉体相互穿插关系和金品位分形分维值研究，说明该区金成矿时间上至少经历了3次地质成矿作用的叠加，其中显著成矿作用发生在后2次，在空间上深部（1000m以下）具有较大的找矿潜力；金品位分形分维特征能较好地划分成矿阶段，在同一个成矿阶段，分维值越小，矿化作用越好，在同一个成矿区间，分维值越大，成矿作用越好。

Abstract:

Collecting 4597 gold grade parameters from 82 drillings of Sizhuang gold deposit, according to the scaling of 100m, its mean, standard deviation, coefficient of variation in vertical direction, and the proportion which is greater than industrial grade minerals are analyzed. Compared to characteristics of fractal dimension values in vertical direction, some rules have been found as follows: gold ore body in deep part is better than its in shallow part in Sizhuang deposit. Regarding the scope of [CD*2] 700 ~ [CD*2] 800m as the mineralization center, its distribution in vertical direction is at least 500m or more. Through study on rock alteration zoning characteristics, combination characteristics of ore bodies, mutual relations of underground vein, and interspersed fractal dimension values of gold grade, it is showed that the time of gold mineralization in this area has experienced at least 3 times a superposition of geological mineralization, while the later two mineralization are most significant. It has a large exploration potentiality in deep part in space ([CD*2] 1000m or less). Fractal dimensional characteristics of gold grade can reflect forming stage effectively. In the same mineralization stage, the smaller the fractal dimension is, the better the mineralization is.