关键词: 地球化学异常, 传统统计学方法, 85%累计频率, 多重分形

Abstract:

How to extract geochemistry anomalies reasonably is the fundamental question in the field of exploration geochemistry which is the key to the mineral exploration. In this study, we test the distribution characteristics 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% cumulative 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.

Key words: geochemical anomaly, traditional statistical method, 85% cumulative frequency method, multifractal