地质通报2024，Vol.43Issue(5)：667-679,13.DOI:10.12097/gbc.2022.10.026
江西宁都白云母伟晶花岗岩型高纯石英用硅质原料矿床特征与资源潜力
Deposit characteristics and potential resources of silicon material for high-purity quartz of muscovite-pegmatite-granite type in Ningdu,Jiangxi Province
摘要
Abstract
High-purity quartz,exhibiting exceptional physical and chemical properties,has emerged as a critical raw material for strategic industries.China,being a major consumer of high-purity quartz,currently relies on imports for all its high-end products in this domain.The primary challenges faced by China in the realm of high-end high-purity quartz lie in the scarcity of resources with superior quality silica as raw materials and the dearth of advanced processing technologies.High-quality and high-purity silica are crucial prerequisites for processing high-end,high-purity quartz.Therefore,China urgently needs to break through the bottleneck of high-quality resources.By conducting a comparative analysis with alaskite-type high-purity quartz material from the Spruce Pine region in the USA,we have discovered siliceous materials suitable for producing high-purity quartz in the Ningdu County of Jiangxi Province,located west of the Wuyi Mountains.Consequently,it can be inferred that prospecting in this region offers favorable conditions for obtaining granitic siliceous materials required for manufacturing high-purity quartz.Based on the study of metallogenic geological background and deposit geology,mineral characteristics of ores,quartz inclusions,gas-liquid inclusions composition in quartz,rock geochemistry,impurity elements in quartz and major lattice impurity elements were investigated to discuss the ore genesis and evaluate their resource potential.The Ningdu muscovite granitic pegmatite is classified as subalkaline peraluminous granite with a high abundance of K-feldspar.The K content exceeds that of Na,exhibiting enrichment in large ion lithophile elements while displaying low concentrations of high field strength elements and rare earth elements.Additionally,Eu anomalies are observed both positively and negatively.Gas-liquid inclusions are the predominant type of inclusions found in quartz,constituting approximately 1.69%of the total area,with a small number of mineral inclusions such as muscovite present.The impurity elements Mg,Fe,and Li exhibit similarities to Spruce Pine quartz in alaskite,while the overall content of impurity elements is relatively low at an average value of 618.03×10-6.Within the quartz lattice structure,Al,Li,and Ti are identified as the main impurity elements with a very low total content(89.82×10-6),whereas SiO2 accounts for over 99.99%of quartz composition.This high-purity silicon material possesses excellent quality and exhibits significant potential as indicated by its abundant predicted resource quantity.Ningdu muscovite granitic pegmatite is situated within the middle-deep root zone of Huitong pluton and represents an S-type granite within the Caledonian orogenic belt that evolved from light-colored granitic magma enriched with feldspar and quartz during the same period as pluton's evolution process.These research findings hold great significance for comparative studies on similar ore deposits within western Wuyi region,and provide valuable guidance for prospecting activities targeting high-purity quartz silicon materials across China.关键词
江西/白云母伟晶花岗岩/高纯石英用硅质原料/矿床特征/资源潜力/矿产勘查工程Key words
Jiangxi/muscovite pegmatite granite/silicon material for high-purity quartz/deposit characteristics/potential resources/mineral exploration engineering分类
天文与地球科学引用本文复制引用
唐春花,张生辉,袁晶,陈艳,钱正江,刘小龙,孙超,周渝..江西宁都白云母伟晶花岗岩型高纯石英用硅质原料矿床特征与资源潜力[J].地质通报,2024,43(5):667-679,13.基金项目
中国地质调查局项目《江西宁都、万载地区钴矿等关键矿产地质调查与找矿预测》(编号:DD20190159-2020-5)、《华东地区脉石英晶质石墨等重要非金属矿综合利用评价》(编号:DD20190186)、江西省重点研发计划项目《江西高纯石英矿物原料优选提纯关键技术与应用研究》(编号:20212BBG71003)、江西省地质勘查基金项目《江西省宁都县王西村高纯石英原料矿普查》(编号:20210016) （编号:DD20190159-2020-5）
