基于地质统计学的普朗斑岩矿床铜矿化空间结构及品位分布规律研究  

Geostatistics-based Mineralization Spatial Structure and Copper Distribution of Pulang Porphyry Copper Deposit

作　　者：施宝生 杨帆 余璨 李社 SHI Baosheng;YANG Fan;YU Can;LI She(Diqing Nonferrous Metal Co.,Ltd.,Shangri-La,Yunnan 674400,China;Yunnan Copper of Mineral Resources Exploration Co.,Ltd.,Kunming 650051,China;Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.,Kunming 650051,China)

机构地区：[1]云南迪庆有色金属有限责任公司,云南香格里拉674400 [2]中铜矿产资源有限公司,云南昆明650051 [3]中国有色金属工业昆明勘察设计研究院有限公司,云南昆明650051

出　　处：《昆明理工大学学报（自然科学版）》2021年第6期44-57,共14页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：中国铜业有限公司重点科技计划项目(20200103)。

摘　　要：以普朗斑岩铜矿床为研究对象,通过对铜矿(化)体品位变异函数的计算分析,构建了变异函数球状模型,并得到铜品位沿走向、倾向及厚度方向上的参数.分析表明,铜元素在矿区内具有显著的空间结构性:首采区、北矿段铜元素品位呈几何异向性,而东矿段铜元素品位具有带状异向性.运用球状模型套合的方法构建了铜元素品位各向异性的套合结构模型,发现铜元素品位在首采区及北矿段沿走向、倾向及厚度方向具有明显的坐标性变化,而在东矿段沿走向、厚度方向具有明显的随机性变化.据此认为,控制矿(化)体空间变化的因素主要由矿床成因所决定,其中首采区、北矿段斑岩型浸染状矿化较均匀,而东矿段“大脉状”矿体存在多阶段矿化的叠加,致使成矿元素具有显著的分带性.结合矿体实际地质特征及铜品位分布规律,认为首采区与东矿段所挟持地段具有良好的找矿前景.We studied Pulang Porphyry Copper Deposit,established the corresponding spherical model,and obtained some parameters along the direction of strike,tendency and vertical according to the variogram analysis of copper(mineralization)ore-grade in ore-bodies.The results showed obvious spatial structural characteristics.The copper grades in the First mining area and the Northern ore-section showed geometric anisotropy,and the copper grade in the Eastern ore-section showed brand-like anisotropy.In addition,we built the nugget structure model by using the suit spherical model.It indicates that both the copper grade in the First mining area and the Northern ore-section have obvious coordinate changes in the direction of strike,tendency and vertical,and the copper grades in Eastern ore-section have obvious a certain randomness change in the direction of strike and vertical.Accordingly,we sum up that the factors which control the ore-body’s change are mainly the cause of ore genesis.The First mining area and the Northern ore-section have uniform mineralization,and the Eastern ore-section has multi-stage vein mineralization during ore-formation.Ore-forming elements have a clear zoning.Based on the geological features of ore-bodies and distributing law of copper grade,we hold that the section between the First mining area and the Eastern ore-section has favorable prospecting potential.

关 键 词：变异函数 斑岩铜矿 DIMINE软件 普朗铜矿 

分 类 号：P618.41[天文地球—矿床学] P628.2[天文地球—地质学]