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《Geochimica》 2006-01
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Relationships between indium and tin, zinc and lead in ore-forming fluid from the indium-rich and -poor deposits in China

ZHU Xiao-qing1, ZHANG Qian1, HE Yu-liang1,2 and ZHU Chao-hui1,21. Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China  
In China, indium-rich deposits are almost the cassiterite-sulfide or tin-bearing Cu-Zn-Pb sulfide deposits. That is to say, enrichment of indium in one deposit depends on whether tin exists to a certain extent. In order to find out relationship between tin and indium, the fluid inclusions in quartz from some indium-rich and -poor deposits in China are taken as ore-forming fluid and contents of In, Sn, Zn and Pb are analyzed by ICP-MS in this paper. The result shows that contents of Pb and Zn in the ore-forming fluid from the two types of deposits are uniform, their range is from 31 to 74 μg/g for Pb and 164 to 221 μg/g for Zn, while contents of In and Sn in ore-forming fluid from the indium-rich deposits, which are from 2.5 to 4.1 μg/g for In and from 15 to 39 μg/g for Sn, are largely higher than those from the indium-poor deposits, which are from 0.03 to 0.09 μg/g for In and from 0.4 to 2 μg/g for Sn. These characteristics indicate that indium-rich ore-forming fluid is the material foundation for formation of the indium-rich deposit, and element tin probably plays an important role in the processes of the indium activation, transference and enrichment.
【Fund】: 中国科学院知识创新工程重要方向项目(KZCX3S-W-125);; 国家自然科学基金(40172037 40072036)
【CateGory Index】: P595
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