An experimental study of tin partition between melt and aqueous fluid in F/Cl-coexisting magma  

作　　者：HU XiaoYan BI XianWu SHANG LinBo HU RuiZhong CAI GuoSheng CHEN YouWei 

机构地区：[1]State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China [2]Guizhou Bureau of Nonferrous Metal Geological Exploration, Guiyang 550002, China [3]Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Science Bulletin》2009年第6期1087-1097,共11页

基　　金：Supported jointly by National Basic Research Program of China (Grant Nos. 2007CB411404 and 2007CB411408);National Natural Science Foundation of China (Grant Nos. 40373020 and 40503007);"Western Light" Project of the Chinese Academy of Sciences

摘　　要：为了调查听矿石的形成机制，与忍受 F 花岗石联系了，在忍受 F 之间的听分区的试验性的研究花岗石融化，共存的忍受 HCl 水的液体与接近 NNO 的 fo <SUB>2</SUB> 在 850 ° C 和 100MPa 被进行。锡的 Geochemical 行为被变化在以不同氧化铝浸透索引 ASI 开始稳固的材料跟踪，在 F 内容并且在开始各种各样的 HCl 集中的液体。结果显示出那 D <SUB > 有 ASI 的 Sn </SUB> 增加融化并且每铝土融化为进在 F/Cl-coexisting 系统的水的液体的听分区是有利的。更高的 HCl 集中的水的液体为锡的丰富是有益的。而且，在玻璃跑产品的氯内容在岩浆与 F 和 Cl 内容断然相关。在 F/Cl-coexisting 系统，花岗石在能为听矿石的形成用作一座水库的 melt 与内容(】&#8764;1 wt%) 能提取并且充实的高 F 融化锡。然而，当在 melt 的 F 内容在 1 wt% 下面时，锡的分配系数将显著地增加。因此， F 内容的减少对进有高 HCl 内容的水的液体的锡的分区有利，因此支持热水的听矿石的免职。In order to investigate the formation mechanism of tin ores associated with F-bearing granite, an experimental study of tin partition between F-bearing granitic melt and coexisting HCI-bearing aqueous fluid was conducted at 850℃ and 100MPa with fo2 approaching NNO. Geochemical behavior of tin was traced by changes in starting solid materials with different alumina saturation index ASI, in F content and in starting fluids of various HCI concentrations. The results show that Dsn increases with ASI of melt and peraluminous melt is favorable for tin partition into aqueous fluid in the F/CI-coexisting system. Aqueous fluid of higher HCI concentrations is advantageous for enrichment of tin. Furthermore, chlorine contents in glass run products correlate positively with F and CI contents in the magma. In the F/CI-coexisting system, granitic melts with high F contents （〉 -1 wt%） could extract and enrich tin in the melt which can serve as a reservoir for the formation of tin ores. However, the partition coefficient of tin would increase significantly when F contents in the melt were below 1 wt%. Therefore, the decrease of F contents is favorable to the partition of tin into aqueous fluid with high HCI contents, thus promoting deposition of hydrothermal tin ores.

关 键 词：共存系统 孔子 分区 实验 岩浆 水 人机交互 融化 

分 类 号：P588.11[天文地球—岩石学] S435.112[天文地球—地质学]