海南省儋州文溪坡钨铯多金属矿段钨元素的赋存状态

发布时间：2018-08-30 20:30

【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。
[Abstract]:The tungsten deposit in Wenxipo section, Danzhou, Hainan Province, is a newly discovered tungsten deposit. On the basis of field investigation and research, by using artificial heavy sand, chemical phase, optical microscopical identification and electron probe, the author finds out that tungsten occurs mainly in the form of scheelite, followed by wolframite. There is a trace of tungsten. The wolframite is breccia, vein-like and self-shaped, and the particle size is greater than 0.5 cm,. The particle size of scheelite is between 0.1 mm and 0.5 mm. The wolframite is closely associated with silicification, electrochemistry, and potassium sodium silicate alteration veins, and the grain size of the wolframite is larger than 0. 5 cm, and the grain size of the wolframite is between 0. 1 and 0. 5 mm. The distribution characteristics of scheelite are convenient for separation and recovery. Some solid mineral inclusions, such as plagioclase, apatite, quartz, cesium garnet, albite, tourmaline, cesium rich mica, ilmenite, cerium cinnamonite and so on, are encapsulated in the megacrystalline of the breccia scheelite. It is assumed that these minerals will be enriched in the scheelite concentrate. It has the potential value of comprehensive recovery and utilization, so it is necessary to further study cesium and rare earth recovery technology in the future. The solid mineral inclusions in scheelite are preformed minerals (cesium eclogite albite) captured by scheelite or metasomatic along early scheelite fissure and recrystallized indicating that scheelite was formed in alkali rich acid granite metallogenic system.
【作者单位】：有色金属矿产地质调查中心;海南茂高矿业有限公司;
【基金】：海南茂高矿业有限公司找矿科研专项基金(编号:MGY201601)
【分类号】：P618.2

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