次生晕数据的对数正态泛克立格法研究及异常评价

Processing of Secondary Halo Data and Assessment of Geochemical Anomalies Using Lognormal Universal Kriging

首先介绍了对数正态泛克立格法的基本理论和方法,包括对数正态分布,三参数对数正态分布,求解估值(Z_v)~*所需的权系数λ_α.及求解漂移值(m_v)~*所需的权系数ρ_α的对数正态泛克立格方程组.其次,笔者应用对数正态泛克立格法探讨了华北某测区的次生晕数据、元素统计分布特征以及变异函数及结构分析.最后,给出测区估计结果,元素综合异常图,划分出5个异常区,并结合地质条件对异常进行了综合评价.

First of all, basic theory and teehnigues of lognormal universal kriging (LIK) are intrcduced in this paper, dealing with lognormal distribution, three parameter lognormal distribution, weighting coefficients λ_α required for the evaluation of estimate value Z_v and the weighting coefficients of LUK equation system ρ_α required for calculating the value of drift m_v. Then a discussion is made en processing the secondary halo data from an area in North China by LUK teehniques in following aspects: the statistical distribution feature of chemical elements, variogram function and structural analysis. Lastly, the LUK estimation of the elements of the said area, and synthetical anomaly maps are given The five anomaly zones delineated were comprehensively assessed in the light of geological condition.