Multifractal model analysis of gold and associated elements of Neoarchean gneiss type gold deposit in West Liaoning,China
Neoarchean Gneiss is widely distributed in West Liaoning,where the developed gold mineral re-sources are richful.In order to study the importance of co-associated elements of gold deposits in Neoarchean gneiss in West Liaoning Province for gold mineralization.This article takes the combination analysis data of typical gold deposits and ore bodies in mineralization point within the Neoarchean gneiss in Western Liaoning region as the sample,and applies the multifractal theory to analyze the correlation between the mass fraction of Ag,Cu,Pb,Zn,S elements and Au element.Furthermore,a multifractal model of Au and co-associated elements based on the multifractal theory is established.According to the fitting analysis result of multifrac-tal model,the fitting curve distribution of Au,Cu,Pb,Zn and S elements is obviously downward convex,and their evenness is between Normal distribution and Exponential distribution.The generalized fractal di-mension values are greater than 1.3,indicating that there is an obvious correlation between them.The fit-ting curve distribution state of Ag element is significantly different from other elements,suggesting that the enrichment of Ag element is not affected or is very little affected by other elements.Combined with the char-acteristics of element affinity,the sulfur affinity of Au,Ag,Cu,Pb,Zn is analyzed with S element as the core,and the evolution process of Au in Neoarchean gneiss type gold deposits is divided into four stages,which are ① pyrite enrichment stage,② associated stage of natural gold,③ the stage of replacement and filling and ④ metamorphic oxidation stage,respectively.According to the fitting analysis results of multi-fractal model,combined with the theoretical study result of previous researchers,it is shown that the co-as-sociation of associated elements in Neoarchean gneiss type gold deposits is very important for the gold miner-alization,which can provide an important indicator for the direction of later exploration and prospecting work and discovery of the concealed deposit.
Neoarchean gneissmultifractionsulfur affinityevolutionary process
万方数据
维普
