桂林理工大学学报2011，Vol.31Issue(1)：11-18,8.
大坪超大型金矿床铅和硫同位素组成特征及其地质意义
Lead and Sulfur Isotope Characteristics and Geological Implication of Daping Gold Deposit
摘要
Abstract
Daping gold deposit,located in the southern Yunnan, is representative gold deposit in Ailao Mountain gold belt. The ore bodies are hosted in Hercynian Taojiazhai diorite body. The ore is mainly quartz vein-type,with a variety of sulfide like, pyrite and galena. The geochemical characters of Pb and S isotope of galena are studied. The quartz-vein-type ores formed in main mineralization stage show that the Pb isotope has a relatively narrow ratio of 206Pb/204Pb and a relatively high ratio of 207pb/204Pb and ratio of 208Pb/204Pb with a small-group change and normal distributing range of Pb. Interrelated character parameter with calculation is found to analyze the conformation mode of Pb. Pb in the ore is from crust-mantle mixed lead. The composition of sulfur isotope within variation ranges is -4.9‰ to 9.2‰,and average value is 3.12‰,which deviates the scope of aerolitic sulfur but highly approaches the value of basic rocks. Sulfur is mainly from the deep part, while the composition of sulfur isotopes is after S in mantle mixed with substance of the crust. Studies suggest that metallogenic mass of the deposit is from mixture of deep mantle-derived and crust-derived mineral.关键词
铅同位素/硫同位素/金矿床/成矿物质/大坪/云南Key words
lead isotope/ gold deposit/ metal sources/ Daping/ Yunnan分类
天文与地球科学引用本文复制引用
袁士松,葛良胜,郭晓东,朝银银,张岱..大坪超大型金矿床铅和硫同位素组成特征及其地质意义[J].桂林理工大学学报,2011,31(1):11-18,8.基金项目
国家"十一五"科技支撑项目(2006BAB01B10) （2006BAB01B10）
中国地质调查局国土资源大调查项目(200410200036) （200410200036）
