地质统计学在湖南省鼓锣坪Cu、Pb、Zn元素空间分布格局研究中的应用

Application of Geostatistics on Spatial Distribution of Cu,Pb,Zn in Guluoping

应用地质统计学的理论与方法,对鼓锣坪Cu、Pb、Zn元素进行了统计特征分析,发现其分布具有明显的结构性、随机性双重性质和空间变异性,并依此建立了相应实验变异函数;通过最优参数估计、模型判断和检验,优选出最佳实验变异函数参数值及理论模型。采用克里格内插方法,推测出各元素空间格局及含量,并编制了该区Cu、Pb、Zn元素空间分布格局图。研究结果表明,该区Pb、Zn元素分布与含量明显受地层及岩性控制,而Cu相对较弱;Pb、Zn共生概率最高,Cu、Zn次之,而Cu、Pb最低。

By the theory and method of geostatistics,the characters of Cu,Pb and Zn are analyzed in Guluoping.The distribution of metallogenic elements has obvious structure-random double characters and space variability.The corresponding experimental variation function is based on the result.With the most superior parameter and the model,the superior parameter of variation function and theoretical model are selected.The spatial distributions and content of metallogenic elements are estimated with the applying of Kriging interpolation.It is indicated that the distribution of Pb and Zn elements is controlled by the stratum and lithologic characters,but Cu not obvious.The probability of Pb-Zn paragentic ore is maximal,Cu-Zn taking second and Cu-Pb lowest.