内蒙古白音郭勒地区地球化学异常提取方法对比研究

摘要

How to extract geochemistry anomalies reasonably is the fundamental question in the field of explora-tion geochemistry which is the key to the mineral exploration.In this study,we test the distribution characteris-tics of geochemical elements data by using the histogram of element contents and the testing method of skewness and kurtosis.The distribution characteristics of Cu,Ag,Pb and Zn did not follow the normal distribution and lognormal distribution,showing the characteristics of high cluster fractal distribution.This research compares the geochemical anomalies of related elements extracted by adopting traditional statistical method,the 85% cu-mulative frequency method and the content-gross multifractal method.The results show that the content-gross multifractal method based on the spatial distribution and content distribution of elements is relatively reasonable for studying geochemistry anomalies.This method overcomes the limitations of traditional methods effectively and reflects the information of geochemical anomalies objectively in the study area.%勘查地球化学的基础性问题是如何合理地提取地球化学异常下限，这是影响勘查地球化学在矿产勘查中效果的主要因素。利用 SPSS 软件，通过含量对数频率直方图，结合偏度、峰度检验法检验元素的含量分布型式，发现研究区的 Cu、Ag、Pb、Zn 元素不服从正态或对数正态分布，而呈现多峰态、高丛集的多重分形特征。采用传统的统计学方法、85％累计频率法、含量-总量多重分形法提取相关元素地球化学异常，并进行对比研究。研究结果表明，基于元素空间分布及含量分布规律的含量-总量多重分形方法，有效克服了传统方法的局限，比较客观地反映研究区的地球化学异常信息，是研究地球化学异常比较合理的方法。