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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。
Hainan Danzhou Wen Creek slope section of the mine is a newly discovered tungsten deposit. On the basis of the field investigation and research, the author systematically ascertained that the tungsten element in the Wenxipo section is mainly scheelite by the methods of artificial heavy sand, chemical phase, optical microscopic identification and electronic probe. Deposit, followed by wolframite, a trace of tungsten. Schematic scheelite scheelite megacrysts, veinlets and self-shaped granular output, brecciated scheelite diameter greater than 0.5 cm, self-shaped scheelite diameter between 0.1 ~ 0.5 mm, white Tungsten ore and silicidation, electrovaporization, potassium-sodium silicate erosion alteration vein closely intergrowth, scheelite embedded features facilitate dissociation, beneficiation beneficiation recovery. Part of the brecciated scheelite giant crystals wrapped with plagioclase, apatite, quartz, pollucite, albite, tourmaline, cesium rich phlogopite, ilmenite, cerium corduroy and other solid mineral package It is speculated that these minerals will be enriched in scheelite concentrates and has potential value for comprehensive recovery and utilization. In the future, it is necessary to further study comprehensive recycle technologies such as cesium and rare earth. In the scheelite, the solid mineral inclusions were precipitated with scheelite (pollucite and albite) or scheelite along the fractures of early scheelite and recrystallized to yield the scheelite formed in alkali-rich acid Granite metallogenic system.