峪耳崖金矿床元素地球化学地质统计分析

峪耳崖金矿床为大型－特大中温热液型金矿床，形成于燕山中晚期，金矿脉包括两种自然类型，即脉型和细脉网脉浸染型，通过对金的统计分布特征和空间分布特征的研究，认为金矿化为一个矿化期两个矿化阶段，金品位由对应于矿化阶段的两个对数正态分布总体混合而成，在垂向空间上各空间段的金品位都是由两个对数正态总体控一定比例叠加而成；三个矿化带在垂向空间依次向下分布，矿化强度随标高减小而增高，综合考虑相关分析，聚类分析，模糊聚类分析的结果，提炼出与金矿化密切相关的最佳地球化学标志组合，运用回归分析，模型出原生金矿化元素地球化学模型，利用变异指数法确定了矿体原生晕垂向分带。

GEOSTATIC ANALYSIS OF ELEMENT GEOCHEMISTRY FOR YUERYA GOLD DEPOSIT

Yuerya gold deposit in Hebei province, China is a large super large sized mesothermal ore deposit. It was formed in Middle Late Yanshanian period consising of lode and veinlet disseminated gold mineralizations. The gold statistic distribution and spatial distribution analysis reveal one epoch and two stages of Au mineralization. Data of Au grades show mixation of two normal logarithmic distribution populations corresponding to the two mineralization stages. In each vertical interval the tow populations are overprinted in a certain proportion. Three mineralization zones are in turn vertically down to depth with increasement of mineralization intensity as elevation level goes down. Based on correlation, cluster and fussy cluster analyses are extracted the optimum combinations of geochemical marks which are closely related to gold mineralication. Element geochemistry model of the primary mineralization halo is simulated by regression analysis and vertical zoning of the ore body primary halo by variable index method.