构造地球化学测量方法在老挝Phabon金矿床的应用及深部预测  

Application and deep prediction of structural geochemical measurement methods in the Phabon gold deposit of Laos

作　　者：牛英杰[1] 王居松 曹敏[1] 陈向平 孙宏岩[1] 王艳辉[1] 席丹 郭豪坤 NIU Yingjie;WANG Jusong;CAO Min;CHEN Xiangping;SUN Hongyan;WANG Yanhui;XI Dan;GUO Haokun(Tianjin North China Geological Exploration Bureaun,Tianjin 300170,China)

机构地区：[1]天津华北地质勘查局,天津300170

出　　处：《矿产勘查》2025年第2期294-308,共15页Mineral Exploration

基　　金：天津华北地质勘查局科研项目“老挝爬奔金矿构造地球化学地球化学特征及深边部隐伏矿体预测”(2019-2020-B)资助。

摘　　要：Phabon金矿是老挝境内首个发现的方解石型金矿,矿体赋存于下二叠统的厚层灰岩中,主要受构造控制。为了寻找矿区深边部隐伏矿体,缓解矿山对后备资源的需求,本文以Ⅴ号矿体为研究主体,采用构造地球化学测量方法对其中19种元素数据进行统计分析,通过对比已知区未知区地球化学特征,认为Au的成矿过程与Hg、Ni、As的富集有密切关系,其元素组合有一定的找矿指示意义,矿体首尾部出现前缘晕和尾晕叠加现象,分带序列排列复杂且出现“反分带”现象,预测矿区深部存在隐伏矿体。该方法补充和完善了已有成矿模型,可为深边部隐伏矿的预测提供数据支撑,指导矿山开发。Phabon gold mine is the first discovered calcite-type gold deposit in Laos.The ore body is hosted in thick layers of Lower Permian limestone and is mainly controlled by tectonics.To search for concealed ore bodies in the deep and peripheral parts of the mining area and alleviate the demand for reserve resources,this study takes the No.5 ore body as the research subject and uses the tectonic geochemical survey method to statistically analyze the data of 19 elements.By comparing the geochemical characteristics of the known and unknown areas,it is believed that the mineralization process of Au is closely related to the enrichment of Hg,Ni,and As,and the combination of these elements has certain exploration significance.The leading and trailing halos overlap at the head and tail of the ore body,and the zonation sequence is complex with"reverse zonation"phenomena.It is predicted that there are concealed ore bodies in the deep part of the mining area.This method supplements and improves the existing miner-alization model and can provide data support for the prediction of concealed ore bodies in the deep and peripheral parts,guiding the development of the mine.

关 键 词：Phabon金矿床 轴向分带序列 构造地球化学 原生晕特征 隐伏矿预测 

分 类 号：P618.51[天文地球—矿床学]