江西朱溪铜钨矿床绢云母光谱特征与矿物成分、矿化的关系研究  

Relationship between Spectral Characteristics of Sericite and Mineral Composition and Mineralization of Zhuxi Copper-Tungsten Deposit in Jiangxi

作　　者：连敦梅 郭娜[1] 胡正华 龙沱江 袁珊 米玛旺久 LIAN Dunmei;GUO Na;HU Zhenghua;LONG Tuojiang;YUAN Shan;MIMA Wangjiu(School of Earth Sciences,Chengdu University of Technology,Chengdu 610000,Sichuan,China;Jiangxi Provincial Geological Exploration Fund Management Center,Nanchang 330000,Jiangxi,China;The Second Geological Brigade of Tibet Geological Exploration Bureau,Lhasa 850000,Tibet,China)

机构地区：[1]成都理工大学地球科学学院,四川成都610000 [2]江西省地质勘查基金管理中心,江西南昌330000 [3]西藏地质勘查局第二地质大队,西藏拉萨850000

出　　处：《中国钨业》2020年第5期20-34,共15页China Tungsten Industry

基　　金：国家重点研发计划(2018YFC0604105);江西省科学技术厅国家科技奖后备项目培育计划(20203AEI91004);江西地质勘查基金(20150013)

摘　　要：利用短波红外光谱测量钻孔岩芯时发现其中存在大量白(绢)云母矿物,且与成矿关系密切。江西朱溪矿床内大量绢云母光谱特征与其矿物成分、矿化关系问题,研究表明:(1)研究区白(绢)云母形态主要为三种:原生热液成因白云母,颗粒较大,成片状;长石蚀变绢云母,细粒,可见残存长石矿物;泥化绢云母,与绿泥石矿物共存;(2)EPMA测量结果显示城内白(绢)云母具有高Si低Al、K的特点;n(AlⅥ)与Al-OH吸收波长呈现很好的负相关;n(Si)与Al-OH吸收波长呈现出较好的正相关;n(AlⅣ)与Al-OH吸收波长的数据点虽然相对较分散,但整体呈现出一定的负相关;(3)白(绢)云母大量形成于矿化体的近矿区间范围,总体形成了对矿体的包围趋势;矿体介于热液成因白云母+绢云母下部,绢云母+绿泥石上部。The Zhuxi copper-tungsten deposit in Jiangxi is currently the world’s largest tungsten deposit. It is found that there are a large number of sericite minerals when measuring the core of the borehole using short-wave infrared spectroscopy technology, which is closely related to mineralization. This paper comprehensively studies and analyzes the relationship between the spectral characteristics of a large number of sericite in the Zhuxi deposit and its mineral composition and mineralization. The result shows:(1) The study found that there are three types of muscovite in the sample: primary muscovite;sericite is mainly altered from feldspar. All the plagioclase is sericitized,and a small part of the potassium feldspar is sericitized;sericite and chlorite symbiosis;(2) The sericite in the mining area has the characteristics of high Si and low Al and K;n(AlⅥ) and Al-OH The absorption wavelength shows a good negative correlation;n(Si) and Al-OH absorption wavelength show a good positive correlation;the data points of n(AlⅣ) and Al-OH absorption wavelength are relatively scattered, but the whole shows a certain degree;(3) Sericite wavelength is wirelessly related to Cu and WO3 mineralizing elements, but Al-OH absorption wavelength 2 200~2 210 nm sericite is closely related to mineralization, and rich ore is closely related to 2 205~2 210 nm sericite.

关 键 词：朱溪铜钨矿 绢云母 短波红外技术 电子探针 扫描电镜 

分 类 号：TD164.2[矿业工程—矿山地质测量] P618.67[天文地球—矿床学]