现代地质2023，Vol.37Issue(6)：1449-1466,18.DOI:10.19657/j.geoscience.1000-8527.2023.068
赣南金竹坪钨矿床多期成矿作用特征及地质意义
Characteristics of Multiphase Mineralization of Jinzhuping Tungsten Deposit in Southern Jiangxi Province and Its Geological Significance
摘要
Abstract
The Jinzhuping quartz vein-type tungsten deposit is located in the tungsten-polymetallic metallogenic belt in the eastern Nanling region,southern Jiangxi Province.The Yanshanian concealed granite is associated with the Tungsten mineralization,and the lithology is medium-coarse-grained(or porphyritic)biotite monzogranite.The early orebody was strongly affected by late hydrothermal metasomatism,showing multi-gen-erational characteristics.At present,there is still a lack of precise chronology on the time of buried pluton and multi-stage mineralization.In this paper,zircon and wolframite LA-ICP-MS U-Pb dating methods are used to date the porphyrotic biotite monzolitic granite and three generations of wolframites in the deposit.Our data re-veal the multistage metallogenic evolution,and we further discuss the mineralization process.The results show that porphyritic biotite monzogranite was formed at(155.2±0.7)Ma,whilst the three generationgs of wolfram-ites were formed at(164.9±2.4)Ma,(157.4±1.0)Ma and(144.8±1.8)Ma.We considered that the concealed rock of Jinzhuping tungsten deposit was emplaced in 159-155 Ma,and the three stages of hydrother-mal tungsten mineralization were formed in 164.9-144.8 Ma,which were the products of large-scale mag-matism and mineralization in the Yanshanian Nanling tungsten-tin polymetallic metallogenic belt.The first two generations of tungsten mineralization age and granite emplacement age are within error,and is between the pre-viously reported Middle to Late Jurassic for the Nanling metallogenic peak.Meanwhile,the tungsten mineraliza-tion age of the third generation is about 10 Ma later than the granite formation,which may represent the new-found Early Cretaceous tungsten mineralization after the Middle and Late Jurassic mineralization.关键词
黑钨矿/U-Pb定年/热液钨矿化作用/金竹坪钨矿床Key words
wolframite/U-Pb dating/hydrothermal tungsten mineralization/Jinzhuping tungsten deposit分类
天文与地球科学引用本文复制引用
杨俊峰,张娟,刘新星,邱佳炜,王猛,成嘉伟,卢克轩,王瑛雪..赣南金竹坪钨矿床多期成矿作用特征及地质意义[J].现代地质,2023,37(6):1449-1466,18.基金项目
科技部国家重点研发计划青年科学家项目"藏北高Sr/Y淡色花岗岩W-Nb-Ta成矿作用与找矿快速定位"(2021YFC2900100) （2021YFC2900100）
国家自然科学基金项目"基于稀土矿物波谱特征参量的稀土含量反演模型研究"(41702352). （41702352）
