Distribution and existing state of indium in the Gejiu Tin polymetallic deposit, Yunnan Province, SW China  

作　　者：Yubang Li Yan Tao Feilin Zhu Mingyang Liao Feng Xiong Xianze Deng 

机构地区：[1]State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]College of Earth Sciences, Chengdu University of Technology

出　　处：《Chinese Journal Of Geochemistry》2015年第4期469-483,共15页中国地球化学学报

基　　金：supported by the CAS/SAFEA International Partnership Program for Creative Research Teams (KZZD-EW-TZ-20);the National 973 Program of China (2015CB452603);China Geology Survey (12120113078200)

摘　　要：The Gejiu tin polymetallic deposit, located in the southwest margin of the South China Belt bordering on the Yangtze Block, is hosted in Triassic carbonates. This study shows that there is an indium enrichment in the ores.Indium mainly exists in sphalerite-rich massive sulfide ores with a concentration of 198.3–1570 ppm; the indium concentration in sphalerite ranges from 493.3 up to4781 ppm. The inferred indium reserve in the Gejiu Sn deposit is over 4000 t, indicating that the Gejiu tin deposit is a giant In-bearing Sn-polymetallic deposit, similar to the Dachang and Dulong in southwest China. Sphalerite with a high Fe value(8.05–13.27 wt%) is the predominant indium carrier mineral; meanwhile chalcopyrite plays the secondary indium carrier role. EPMA mapping result shows that indium is likely distributed homogeneously and presented as a substitution for Zn in sphalerite.The Gejiu tin polymetallic deposit, located in the southwest margin of the South China Belt bordering on the Yangtze Block, is hosted in Triassic carbonates. This study shows that there is an indium enrichment in the ores.Indium mainly exists in sphalerite-rich massive sulfide ores with a concentration of 198.3–1570 ppm; the indium concentration in sphalerite ranges from 493.3 up to4781 ppm. The inferred indium reserve in the Gejiu Sn deposit is over 4000 t, indicating that the Gejiu tin deposit is a giant In-bearing Sn-polymetallic deposit, similar to the Dachang and Dulong in southwest China. Sphalerite with a high Fe value（8.05–13.27 wt%） is the predominant indium carrier mineral; meanwhile chalcopyrite plays the secondary indium carrier role. EPMA mapping result shows that indium is likely distributed homogeneously and presented as a substitution for Zn in sphalerite.

关 键 词：锡多金属矿床 个旧锡矿 赋存状态 云南省 高铁闪锌矿 铟 硫化物矿石 电子探针分析 

分 类 号：P618.2[天文地球—矿床学]