粤北刘家山地区多元素分形维数谱函数及其对矿化的指示分析

Fractal Dimension Spectrum Function of Multielements of North Guangdong and Its Mineralization Instructions

为了解粤北刘家山地区地球化学元素的分布对成矿作用的影响,利用Q-Q图和聚类分析探讨了元素的空间分布规律,然后运用多重分形方法研究了该区域1573个水系沉积物样品中与成矿密切相关的12种元素的分形分布规律。传统方法采用背景值加两倍方差方法提取异常,采用C-A分形法分离背景和异常,并计算各元素分形维数谱函数。结果表明,C-A分形法可以更有效地研究地球化学元素异常值的分布和富集规律。C-A分形法将统计方法中元素含量和频率分布和异常空间形态等有机的结合,对区分地球化学背景和与矿化有关的异常效果更好,为该地区元素的成矿潜力评价提供重要线索。

In order to study the influence of distribution of geochemical elements on mineralization, this study uses Q-Q plot and cluster analysis to discuss the space distribution of elements in Liujiashan of northern Guangdong province. 12 elements related to mineralization were analyzed on 1573 drainage sedi-ment samples from Liujiashan to recognize their fractal distribution. In contrast to traditional anomaly rec- ognition method with iterative mean _＋ tr, this paper uses C-A fractal to separate anomalies from their background values, and calculates muhifractal spectrum function. The C-A fractal analysis unites element content and frequency distribution of statistic method and singularity space configuration. It is useful for distinguishing chemical background and anomalous values which are relate to mineralization, and can provide significant clue for mineral potential evaluation.