地质通报2025，Vol.44Issue(6)：1033-1047,15.DOI:10.12097/gbc.2024.03.043
内蒙古白音乌拉钨锡矿床蚀变矿物短波红外光谱特征及铍矿化的发现
Short-wave infrared spectroscopy characteristics of alteration minerals and discovery of Be mineralization from Baiyinwula W-Sn deposit in Inner Mongolia
摘要
Abstract
[Objective]Baiyinwula deposit is located in the tungsten-tin polymetallic mineralization belt in the southern section of Great Xing'an Range,which has good prospecting of rare metals.However,in the process of mineral exploration,there have been problems such as unclear hydrothermal mineralization centers and insufficient understanding of the genesis of mineral deposits,which have affected the effectiveness of mineral exploration.[Methods]In this paper,the alteration mineral types and relative contents in this deposit were analyzed by using short-wave infrared spectroscopy.[Results]The results show that the alteration minerals are dominated by muscovite,phengite,illite,chlorite,biotite,topaz and tourmaline,with small amounts of kaolinite,dickite,montmorillonite and calcite.Based on the alteration mineral mapping,two alteration zones are recognized in this deposit:a strong greisenization zone(quartz-phengite-topaz-chlorite-fluorite±biotite±tourmaline)in the middle and deep parts,and a muscovite-chlorite zone(quartz-chlorite-muscovite±biotite±tourmaline)in the shallow parts and the periphery.The spatial relationship between greisenization zone and biotite granite indicate that the hydrothermal fluids derived from the biotite granite and the strong greisenization zone represent the hydrothermal and mineralization center.The characteristic spectral parameters of white-mica group minerals show that the Pos2200 and IC values are relatively high within the strong greisenization zone,and decrease further away from the zone.The increase in Pos2200 is influenced by the composition of the ore-forming fluid,the properties of the surrounding rock,and temperature,while the IC value is mainly related to the temperature of hydrothermal fluid.[Conclusions]High IC value(>2)of muscovite can be used as indicator for prospecting in this deposit.Short wave infrared spectroscopy technology is a very effective exploration method in F-rich granitic magma hydrothermal systems with greisenization.The rapid identification of F-rich topaz may also suggest good exploration potential for Li and Be.The discovery of magmatic-hydrothermal Be mineralization dominated by Beryl in this deposit demonstrates the good application prospects of short wave infrared spectroscopy technology,and also reveals the diversity of Be mineralization types in Great Xing'an Range,implying good potential for Be exploration in the region.It has certain enlightening significance for future exploration targets and directions of rare metals in this region.关键词
白音乌拉/短波红外光谱/白云母族矿物/云英岩化/铍矿化Key words
Baiyinwula/short-wave infrared spectroscopy/white-mica group minerals/greisenization/Be mineralization分类
天文与地球科学引用本文复制引用
任美桥,张昕,李真真,许健,徐文坦,孙珍军,任鹏,赵永春,张世昕,赵俊兴..内蒙古白音乌拉钨锡矿床蚀变矿物短波红外光谱特征及铍矿化的发现[J].地质通报,2025,44(6):1033-1047,15.基金项目
国家自然科学基金面上项目《富B锡-银铅锌成矿系统中锡与银铅锌共生富集机制研究——以内蒙古白音查干矿床为例》(批准号:42272105)、河北省自然科学基金面上项目《大兴安岭南段白音查干锡多金属矿床中铟的赋存状态与富集机制研究》(批准号:D2023512031)、克什克腾旗银达矿业有限公司综合研究项目《内蒙古自治区白音乌拉矿区找矿潜力评价综合研究》(编号:GS2022094)Supported by National Natural Science Foundation of China(No.42272105),Natural Science Foundation of Hebei Province(No.D2023512031),and Comprehensive research project of Keshiketeng Banner Yinda Mining Company Limited.(No.GS2022094) （批准号:42272105）
