| 基于GIS的云南普朗斑岩铜矿床三维成矿预测 |
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| 引用本文：.2007.Three_dimensional metallogenic prediction of Pulang porphyry copper deposit in Yunnan Province by using GIS technology[J].Mineral Deposits,26(6):651~658 |
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| 基金项目:云南省香格里拉普朗铜矿成矿规律与成矿预测研究项目（H02215）和国家“十一五"科技支撑计划项目（编号：2006BAB01A08） |
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| 中文摘要:文章根据云南普朗斑岩铜矿床地质特征以及矿区72个见矿钻孔中8 145个岩芯样品的铜含量分析数据，采用GIS空间分析技术和利用邻近距离统计分析方法，优化和提取了矿床定位预测所需点位的数据信息（包含三维空间坐标及其对应的铜含量数值）。在此基础上，选用反距离权重内插法，在比例尺1：10 000的尺度上，确定了该矿区铜元素在海拔3 171～4 319 m不同高度的空间分布状况，并利用3D_GIS的规则六面体成像技术和邻近采样点插值法，建立了该铜矿床含矿岩体（铜含量不小于0.2%）和铜矿体（铜含量不小于0.3%）的三维模型，确定含矿岩体和铜矿体的形态为“锥状体"。最后，在综合分析云南普朗铜矿床特征及其保存条件和剥蚀状况以及钻探资料和矿床三维空间特征的基础上，确定矿床的南西侧具有较好的找矿潜力，认为矿床的东、北两侧深部是有利的成矿远景区。 |
| 中文关键词:地质学 GIS 斑岩铜矿床 三维 定位预测 云南普朗 |
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| Three_dimensional metallogenic prediction of Pulang porphyry copper deposit in Yunnan Province by using GIS technology |
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| Abstract:Based on geological characteristics and Cu analyses of 8 145 samples collected from 72 boreholes showing mineralized porphyry in the Pulang porphyry copper deposit, Yunnan, the authors, using GIS spatial analysis and neighborhood statistics, optimized and selected data of localized points composed of three_dimensional coordinate values and corresponding Cu contents for the localization and prediction of the deposit. The spatial distribution of copper on the scale of 1：10 000 and at the depths from 3 171 m to 4 319 m in this deposit was also determined by using Inverse Distance Weighted (IDW). Meanwhile, the 3D models for the mineralized body with Cu (tenor) 0.2% and the ore body with Cu (tenor) 0.3% in this deposit were set up by using Regular Hexahedron Imaging Technique of 3D_GIS and Spatial Interpolation of Adjacent Sampling Points, leading to the shape definition of the mineralized body as a large lens and the ore body as a cone. According to geological and spatial features and borehole data of the deposit combined with its preserving and denudation condition, the southwest area of the deposit is considered to be a potential district in search for ore bodies, and the deep parts on the northern and eastern sides of the ore deposit are thought to be ore_forming promising areas. |
| keywords:geology, GIS, porphyry copper deposit, three_dimension, localization and prediction,Pulang in Yunnan Province |
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