GEOCHEMICAL CHARACTERISTICS OF TAILINGS FROM THE DEXING COPPER MINE
PAN Han-jiang1, CHENG Zhi-zhong1, YANG Rong1, HE Ling1, SHANG Yun-tao2
1. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China;
2. Development and Research Center, China Geological Survey, Beijing 100037, China
Tailing samples were collected by drilling in No. 1 tailing dam from the Dexing mine. The multi-element analytical scheme were applied. The tailing size was determined by the laser grain size analytical instrument, and the mineral form was determined by X-ray powder diffractometry. Some conclusions have been reached: The major particles of the tailing are silty, with quartz and sericite as the main minerals, while the content of metal minerals is less than 1%. The water-sorting action and supergene geochemical process in the tailing dam combined with changes in ore grade and mineral processing caused uneven distribution of elements and particle sizes of tailing. The tailing particle size decreases in the direction of the tailing discharge, and the elements can be divided into 3 zones: Cu, Fe, Mo→SiO2, Au→Al2O3, Tl. During the supergene geochemical process, the sulfide was weathered into oxides,which led to the significant decrease of the pyrite content, with the loss of Cu, Mo, S, Fe, Ca and C in tailing. Meanwhile sericite changed into illite.
[1] Annika Parviainen.Tailings Mineralogy and Geochemistry at the Abandoned Haveri Au-Cu Mine, SW Finland[J].Mine Water Environ,2009,28:291-304.[2] Axel Schippers, Dagmar Kock, Michael Schwartz, et al.Geomicrobiological and geochemical investigation of a pyrrhotite-containing mine waste tailings dam near Selebi-Phikwe in Botswana[J].Journal of Geochemical Exploration,2007,92:151-158.[3] Lena Alakangas.Formation and composition of cemented layers in low-sulphide mine tailingsm, Laver, northern Sweden[J].Environ Geol, 2006,50:809-819.[4] 甘凤伟.个旧多金属矿区尾矿物质成分与污染传输研究[D].北京:中国地质大学,2009:1-119.[5] 刘维阁.江西铜矿山二次资源合理开发与利用[J].江西地质,1999,13(4):283-287.[6] 谭凯旋,郝新才,李卫.湖南湘西金矿尾矿中金的次生成矿作用[J].矿物学报,1999,19(3):273-278.[7] 张锦瑞,王伟之,李富平,等.金属矿山尾矿综合利用与资源化[M].北京:冶金工业出版社,2010:1-211.[8] 张鑫.安徽铜陵矿区重金属元素释放迁移地球化学特征及其环境效应研究[D].合肥:合肥工业大学,2005:1-201.[9] 苏静,欧今次仁,尼霞次仁,等.德兴铜矿周边土壤中铜的形态分布[J].环境科学与技术,2007,30(1):16-19.[10] 田信普,李骏.尾矿提取绢云母及综合利用的探讨[J].中国非金属矿工业导刊,1999,11(5):52-53.[11] 张海星,姚丽文,熊报国.德兴铜矿1号尾矿库废弃土地生态恢复试验研究[J].环境与开发,1999,14(1):10-11.[12] 张兆阳.德兴铜矿尾矿中铜硫组分的开发利用[J].矿业快报,2008,476(12):103-104.[13] 顾成军,戴雪荣,张海林,等.巢湖沉积物粒度特征与沉积环境[J].海洋地质动态,2004,20(10):10-13.[14] 戴塔根,张术根,任荣恩,等.国内外尾矿开发利用调查研究[M].北京:北京矿产地质研究所,1996:1-30.[15] 赵元艺,王金生.矿床地质环境模型与环境评价[M].北京:地质出版社,2007:1-158.[16] 张虎才.元素表生地球化学特征及理论基础[M].兰州:兰州大学出版社,1997:1-79.[17] 朱继保.粤北凡口铅锌矿尾矿风化及其环境效应[D].广州:中国科学院广州地球化学研究所,2004:1-58.[18] 朱训,黄崇轲,芮宗瑶.德兴斑岩铜矿[M].北京:地质出版社,1983:1-72.
