Abstract Main aim of this study is to propose a developed zonality index for Cu-Mo porphyry deposits based on staged factor analysis with Number-Size (N-S) fractal model. This method was used in an Iranian porphyry system as named Serenu (SE Iran). The developed zonality index was a ratio between factors related to major and minor ore elements based on in-situ soil samples. In this study, two factors were extracted after three stages of factor analysis including F1-3 (Pb, Zn, Au, Ag, Mn, Cd, As) and F2-3 (Cu-Mo). Based on these factors, F 1 − 3 F 2 − 3 is determined as a developed zonality index. Furthermore, conventional zonality index was calculated on the basis of ( P b × Z n ) ( C u × M o ) . Then, these zonality indexes were classified by the N-S fractal modeling. Results obtained by the fractal modeling indicates that the main anomalies for the developed zonality index is correlated with plutonic units, mineralized rock samples and exploratory boreholes especially in the central and SE parts of the studied area. This methodology can be utilized for other types of ore mineralization.

中文翻译：

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使用已开发的带状指数模型通过多变量和分形分析在铜钼斑岩矿床中描绘地球化学晕

摘要 本研究的主要目的是基于数量-尺寸（NS）分形模型的分阶段因子分析，提出一种成熟的铜钼斑岩矿床带状指数。该方法用于名为 Serenu（伊朗东南部）的伊朗斑岩系统。开发的地带性指数是基于原位土壤样品的与主要和次要矿石元素相关的因素之间的比率。在本研究中，经过三个阶段的因子分析，提取了两个因子，包括 F1-3（Pb、Zn、Au、Ag、Mn、Cd、As）和 F2-3（Cu-Mo）。基于这些因素，F 1 − 3 F 2 − 3 被确定为发达的地带性指数。此外，常规带状指数是根据 (P b × Z n ) (C u × M o ) 计算的。然后，通过 NS 分形建模对这些带状指数进行分类。分形建模的结果表明，发达地带性指数的主要异常与深成岩单元、矿化岩样品和勘探钻孔有关，尤其是在研究区的中部和东南部。该方法可用于其他类型的矿石矿化。