桂林工学院学报2009，Vol.29Issue(2)：161-168,8.
桂北老堡铅锌矿床的成因研究
Genesis of Laobao Pb-Zn Deposit in North Guangxi
摘要
Abstract
Laobao Pb-Zn deposit is located in the forland basin margin of the Precambrian massif,controlled by lithology and stratiform.The ore mineral is simply composed of sphalerite,galena,pyrite with minor chalcopyrite.The gangue minerals consist of dolomite,cacite,quartz,sericite and chlorite.The homogenous temperatures of fluid inclusion in quartz range from 115 to 270 ℃ with salinity of 3.8%-5.8%.The compositions of fluid inclusion in quartz are rich in CO2,CH4,C2H6 with high w(Na+)/w(K+),w(Cl-)/w(F-)ration and w(Na+)＞w(K+)＞w(Ca2+)＞w(Mg2+).Sulfur isotope of pyrite in ore ranges from 12‰ to 21‰.The oxygen isotope and hydrogen isotope in quartz and fluid inclusions are from 16.0‰ to 18.4‰,from -58‰ to -61‰,respectively.It is suggested that Laobao Pb-Zn deposit has characteristics of MVT type deposit,and its fluids are derived from brine or formation water.关键词
铅锌矿床/矿床成因/MVT/老堡/广西Key words
Pb-Zn deposit/metallogenic/MVT/Laobao/Guangxi引用本文复制引用
梁金城,刘之葵,李晓峰,陆小平,蒙龙华,李文杰..桂北老堡铅锌矿床的成因研究[J].桂林工学院学报,2009,29(2):161-168,8.基金项目
广西地质专项(国土资函[2003]519) （国土资函[2003]519）
广西自然科学基金项目(桂科自0229055) （桂科自0229055）
有色及贵金属隐伏矿床勘查教育部工程研究中心资助项目 （）
