海南省儋州文溪坡钨铯多金属矿段钨元素的赋存状态  

Study on Occurrence State of Wenxi Tungsten Polymetalic Deposit in Danzhou, Hainan Province, China

作　　者：郭玉乾[1] 方维萱[1] 曹经纬 GUO Yu-qian;FANG Wei-xuan;CAO Jing-wei(China Non-ferrous Metals Resource Geological Survey, Beijing 100012, China;Hainan Maogao Mining Co., Ltd. Hainan, Danzhou 571700, China)

机构地区：[1]有色金属矿产地质调查中心,北京100012 [2]海南茂高矿业有限公司,海南儋州571700

出　　处：《矿物学报》2017年第5期545-550,共6页Acta Mineralogica Sinica

基　　金：海南茂高矿业有限公司找矿科研专项基金(编号:MGY201601)

摘　　要：海南儋州文溪坡矿段钨矿是新近发现的一处钨矿床。笔者在野外调查研究的基础上,采用人工重砂、化学物相、光学显微鉴定和电子探针等多种分析方法手段系统查明了文溪坡矿段钨元素主要以白钨矿形式赋存,其次为黑钨矿,有微量钨华。白钨矿呈角砾状巨晶、细脉状和自形粒状产出,角砾状白钨矿粒径大于0.5 cm,自形粒状白钨矿粒径介于0.1~0.5 mm之间,白钨矿与硅化、电气石化、钾钠硅酸盐化蚀变脉密切共生,白钨矿嵌布特征便于解离,利于选矿回收。部分角砾状白钨矿巨晶内包裹有斜长石、磷灰石、石英、铯榴石、钠长石、电气石、富铯金云母、钛铁矿、铈褐帘石等固体矿物包裹体,推测这些矿物将在白钨精矿中富集,具有潜在综合回收利用价值,今后需要进一步研究铯和稀土等综合回收利用工艺。白钨矿中固体矿物包裹体呈先成矿物(铯榴石、钠长石)被白钨矿捕获,或沿早期白钨矿裂隙交代、重结晶产出,指示白钨矿形成于富碱酸性花岗岩成矿体系中。Wenxi tungsten deposit was newly discovered in Danzhou, Hainan Province, China. The study of occurrence state of tungsten has a wider significance not only on industry but also on the study of halo-forming and metallogenic mechanism of tungsten. Based on field survey, combined with artificial sand, chemical composition, microscope identification, electron microprobe analysis, characteristic and occurrence state of the ore minerals were studied. Results show that most tungsten occurs as scheelite and some occurs as wolframite and tungstite. Silicified alteration, tourmalinization, albitization and potassium alteration are the most important alteration types related to the tungsten mineralization. The structures of scheelite are breccia, veinlets and granular, being beneficial for separation. In this study, another important phenomenon is the solid mineral inclusion that formed at different ages in the scheelite. Plagioclase, apatite, quartz, albite, pollucite, tourmaline, phlogopite, ilmenite and orthite occurred as solid mineral inclusions take not only a signification of comprehensive utilization but also the indication for ore-forming fluids related to the acid magmatism system.

关 键 词：白钨矿 固体矿物包裹体 角岩型钨矿 夕卡岩型钨矿 海南儋州 

分 类 号：P579[天文地球—矿物学] P618.67[天文地球—地质学]