中文摘要:本文通过包裹体研究，探讨了银岩斑岩锡矿成矿物理化学条件，通过稀士及稳定同位素研究，探讨了成矿物质及成矿热液来源。包裹体研究表明，斑岩锡矿矿石含有大量气体包裹体和多相包裹体组成的沸腾包裹体，说明锡矿化是在成矿热液减压沸腾条件下发生的。矿化温度为300—400℃，局部高达550℃，热液成分主要为钾钠的氯化物溶液，含盐度高达64质量％。包裹体以含子矿物种类及CO2较多而区别于其它类型斑岩铜矿。稀土及稳定同位素研究表明成岩成矿物质来自硅铝质地壳重熔的花岗岩浆，成矿热液来自岩浆水，受少量地下水的混染。
Abstract:Based on the fluid inclusion studies, this paper discusses tentatively the physical-chemical conditions and material sources for mineralization of the Yinyan porphyry tin deposit, with the main understanding summarized as follows: 1．The minerals in the porphyry tin ore contain lots of high-salinity fluid inclusions and CO2-rich inclusions. It has been determined that the ore-forming fluids had salinity as high as 40-64 wt％NaCl, temperature from 300℃ to 460℃, pressure about 100 bar, fO2 10-25 bar, fCO2 101.1 bar, and Eh about 0.8, so porphyry tin mineralization must have taken place under the condition of weak reduction and boiling of ore—forming fluids caused by decreasing pressure．2．Minerals in the veinlike tin ore contain only a few liquid inclusions. The ore-forming fluids had low salinity of 2-7 wt％ NaCl, temperature from 260℃ to 320℃, pressure some 300 bar, fO2 10-21 bar, fCO2 100.27 bar, and Eh about 0.8．It is therefore considered that this sort of tin ore must have formed during the decrease in temperature and salinity of the ore—forn-ing fluids. 3．The hydrogen and oxygen isotope data of the inclusions suggest that the metallogenic fluids forming the porphyry tin deposit mostly came from the magma, and that during the formation of veinlike ore, magrnatic water was mixed with rain．
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谢奕汉，赵瑞，李若梅，王英兰.1988.银岩斑岩锡矿成矿物理化学条件及成矿物质来源[J].矿床地质,7(3):42~49.1988.Physical-chemical conditions and material sources for mineralizatl0n of the Yinyan porphyry tin deposit[J].Mineral Deposits7(3):42~49
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