赣南高山角斑岩型钨钼矿化新发现与找矿潜力分析  

New discovery and prospecting potentiality of Gaoshanjiao porphyry type W-Mo mineralization in southern Jiangxi Province

作　　者：陶建利 周瑶 郭德银 赵正[2] 王旭 尹积扬 TAO JianLi;ZHOU Yao;GUO DeYin;ZHAO Zheng;WANG Xu;YIN JiYang(The Seventh Geological Brigade of Jiangxi Bureau of Geology,Ganzhou 341000,Jiangxi,China;MNR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China)

机构地区：[1]江西省地质局第七地质大队,江西赣州341000 [2]自然资源部成矿作用与资源评价重点实验室中国地质科学院矿产资源研究所,北京100037

出　　处：《矿床地质》2025年第2期457-476,共20页Mineral Deposits

基　　金：国家重点研发计划项目(编号:2022YFC2905101);江西省地质局第七地质大队项目(编号:赣地矿赣南字[2021]10号)共同资助。

摘　　要：赣南地区素有“世界钨都”之美誉,以石英脉型钨多金属矿床集中产出为特色。近年,赣南银坑矿田高山角矿区新发现了首例斑岩型钨钼矿体,矿体厚大、呈细脉-浸染状,产于高山角花岗闪长斑岩内外接触带,发育硅化、钾长石化、绿泥石化、绢云母化、碳酸盐化等一系列斑岩型矿化蚀变分带特征。高山角钨钼矿床的发现为南岭东段地区提供了新的找矿方向,对区域成矿规律研究意义重大。文章基于详实的矿床地质调查工作,系统梳理了区内斑岩型矿化蚀变分带特征及物化探信息;利用LA-ICP-MS锆石U-Pb法,获得了赋矿花岗闪长斑岩的加权平均年龄为(157.01±0.87)Ma,与赣南地区广泛分布的钨锡矿床成岩成矿时限基本一致;对赋矿花岗闪长斑岩的地球化学特征进行了研究,并与国内外典型斑岩型钨钼矿床进行了对比,除w(SiO_(2))(66.21%~69.55%)略低外,其余特征基本吻合。综合区域成矿规律研究和已有钻探工程控制,文章预测高山角钨钼矿潜在资源量可达大型以上规模。The southern Jiangxi region,renowned as the"Tungsten Capital of the World",is characterized by concentrated occurrences of quartz vein-type tungsten polymetallic deposits.Recently,the first porphyry-type tungstenmolybdenum ore body was discovered in the Gaoshanjiao mining area of the Yinkeng ore field,southern Jiangxi.This thick ore body exhibits veinlet-disseminated texture and occurs in both exo-and endo-contact zones of the Gaoshanjiao granodiorite porphyry.It demonstrates characteristic porphyry-type alteration zoning including silicification,K-feldspar alteration,chloritization,sericitization,and carbonatization.The discovery of the Gaoshanjiao tungsten-molybdenum deposit provides new prospecting insights for the eastern segment of the Nanling metallogenic belt and holds significant implications for regional metallogenic studies.Based on detailed geological investigations,this study systematically documents the alteration zoning characteristics and geophysical-geochemical anomalies.LA-ICP-MS zircon U-Pb dating yields a weighted mean age of(157.01±0.87)Ma for the ore-hosting granodiorite porphyry,consistent with the metallogenic epoch of widespread tungsten-tin deposits in southern Jiangxi.Geochemical analysis reveals that except for slightly lower SiO_(2)content(66.21%~69.55%),other characteristics of the ore-bearing porphyry align well with those of typical global porphyry tungsten-molybdenum deposits.Integrated regional metallogenic analysis and drilling data suggest that the Gaoshanjiao deposit has potential to develop into a large-scale tungsten-molybdenum resource.

关 键 词：斑岩型钨钼矿 成岩时代 矿化蚀变 高山角 赣南 

分 类 号：P618.67[天文地球—矿床学] P618.65[天文地球—地质学]