现代地质Issue(1)：29-35,7.
广西平南新坪金矿成矿流体特征及矿床成因初探
A Preliminary Discussion on Genesis and Ore-forming Fluid Characteristics of the Xinping Gold Deposit in Pingnan County,Guangxi,China
摘要
Abstract
The Xinping gold deposit is located in the Liucen ore field in Dayaoshan polymetallic mineralization belt.The ore bodies,hosted in the sandstone and mudstone of Cambrian Huangdongkou Formation,are related to the Xinping complicated anticline and fracture zone of EW-trending faults.Fluid inclusions in quartz suggest that ore-forming fluids are moderate temperature,low salinity,low density and contain CO2 .The cations in fluids are Na +,Ca2 +,Mg2 + and K +,while main anion is Cl -.The data of hydrogen and oxygen isotopes indi-cate that the ore-forming fluids are probably derived from magmatic fluids,and superimposed by metamorphic fluids and meteoric water also involved.The sulfur isotope values in sulfides are narrowly ranged negative not far from zero,which infers that sulfur in ore is a mixture of sulfur from deep source and strata.Our study combined with previous research show that Au has multi-sources,it mainly sourced from Cambrian strata,but the deep magmatic rocks in the region may also provide some Au.Based on above study,we conclude that the Xinping gold deposit was superimposed mineralization of metamorphism and magmatic-hydrothermal fluids.关键词
稳定同位素/流体包裹体/成矿流体/新坪金矿/平南/广西Key words
stable isotope/fluid inclusion/ore-forming fluid/Xinping gold deposit/Pingnan County/Guangxi分类
天文与地球科学引用本文复制引用
李院强,庞保成,张青伟,吕嘉文,周业泉,赖昕,李培荣..广西平南新坪金矿成矿流体特征及矿床成因初探[J].现代地质,2016,(1):29-35,7.基金项目
中国地质调查局地质调查工作项目“广西大瑶山成矿带平南-昭平地区金矿整装勘查区关键基础地质研究”（12120114052501）；国家自然科学基金项目（41362006）；广西自然科学基金项目（2013GXNSFAA019275）。 （）
