桂林理工大学学报2018，Vol.38Issue(4)：663-673,11.DOI:10.3969/j.issn.1674-9057.2018.04.007
广西佛子冲铅锌矿床硫化物矿物学特征及其成矿指示意义
Mineralogical characteristics of sulphide and mineralization implications from the Fozichong Pb - Zn deposit in Guangxi
摘要
Abstract
The mineralography and mineral chemistry of some sulphide samples from the Fozichong Pb - Zn polymetallic deposit (Guyi and Hesan districts) and their implications to the deposit genesis were analyzed and discussed. There are three types of sulphide assemblages in the Guyi ore district,including the assemblage of pyrrhotite,sphalerite,galena,chalcopyrite and pyrite in the early mineralization stage,the assemblage of sphalerite,galena,chalcopyrite and pyrite in the middle mineralization stage,and the assemblage of galena, sphalerite and pyrite in the late mineralization stage. The sulphide assemblage in Hesan district is relative simple and characterized by the coexisting of galena,sphalerite,chalcopyrite and pyrite,which approximately corresponds to the middle mineralization stage of the Guyi ore district. Our work reveals that: (1) The atomic percentage of Fe in pyrrhotite is 46. 09％ - 48. 00％. The ratio of Zn /Cd,Ga /In and the content of Fe in sphalerite of the Fozichong deposit are 58. 91 - 134. 51,0. 23 - 1. 00 and 1. 98％ - 12. 52％ respectively. These information indicates that the ore-forming temperature may have changed from the high-middle temperature (280 - 400 ℃) to low-middle temperature (150 - 300 ℃) during the mineralization. (2) The ratio of S /Fe is 1. 84 - 1. 99,Co /Ni≥1 in pyrite. The associated trace elements in sphalerite show great diversity (including Fe,Mn, In,Ga,Ge,etc.) and the mean values of Zn /Fe,Zn /Mn,Zn /Cd in sphalerite are 9. 96,404. 73 and 79. 94, respectively. In galena,the content of Ag,Ga,Ge,is generally high and the mean value of Pb /Ag is 514. 23. These information suggests that the sulphide mineralization was closely related to magma-derived hydrothermal activity,and the Fozichong Pb - Zn polymetallic deposit is a typical magmatic hydrothermal type.关键词
硫化物/矿物化学/矿床成因/铅锌矿床/佛子冲Key words
sulphide/mineral chemistry/ore deposit genesis/Pb - Zn deposit/Fozichong!分类
天文与地球科学引用本文复制引用
李晓婷,付伟,柴明春,滕建清,杨启军,雷良奇..广西佛子冲铅锌矿床硫化物矿物学特征及其成矿指示意义[J].桂林理工大学学报,2018,38(4):663-673,11.基金项目
国家自然科学基金项目(41272394) （41272394）
广西自然科学基金项目(2014GXNSFAA118304) （2014GXNSFAA118304）
广西高校优秀中青年骨干教师培养工程项目 （）
