Analysis on the Characteristics and Geological Significance of Variation Function in Mineral Geological Modeling

Abstract

Variation function is a basic tool used in geostatistics. Modern geostatistics using variation function as a tool for the result of the qualitative geology to quantitative geology development. Variation function has not only been widely used in the calculation of modern geological and mineral resources reserves, but also extended to the description of environmental pollution and the spatial migration of elementions. Variogram is a set of deterministic and statistical theoretical tools for understanding and simulating spatial variables. Taking the variogram as a tool which is in the most commonly used in modern geostatistics, the variogram model can be divided into three categories according to the value of the base station or not, the first is the base-station value, which is divided into spherical model, exponential model, Gauss model and pure nugget effect model; The second is the base-free model, which is divided into linear model, power function model, logarithmic function model and cubic model, and the third is hole effect model. Based on the modern geostatistics is most commonly used for variational function tool, analyses the spatial structure change and the variational function of geological body composition variables between the mathematical characteristics, types and its related geological significance, combined with solid mineral, oil and gas resources in the field of practical application examples of analysis of the variation function application problems of stability, etc, and gives his own understanding. It is considered that variation function is a meaningful tool for geological quantitative analysis and visual display of composition in the modeling of mineral geological features when the data amount meets certain sufficient conditions and the research object is applied.