华南地质与矿产2012，Vol.28Issue(2)：175-180,6.
硫化物矿床中闪锌矿Rb-Sr等时线定年方法研究——以湘西新晃打狗洞铅锌矿床为例
Application of Rb-Sr Isochron Dating Method in sphalerite of Sulphide Deposit——A Case Study from Dagoudong Pb-Zn Deposit in Xinhuang,Western Hunan Province
摘要
Abstract
This paper takes a systematic study on the experimental conditions using the grinding method and stepping dissolution technique to extract the fluid phase and sulfide phase from sphalerite for Rb-Sr isochrone dating,and the entire analysis process was established and improved.Through the demonstration of Rb-Sr dating method used in Dagoudong Pb-Zn deposits,western Hunan,the validity of the method was further verified and showed a good application prospects.Three isochron ages are obtained：473±76 Ma for sphalerite mineral-phase,489.6±5.9 Ma for fluid phase ＋sulfide phase of sphalerite by grinding method and stepping dissolution technique,490±6.5 Ma for mineral-phase and fluid phase ＋sulfide phase of sphalerite.The isochron ages indicated that Dagoudong deposit was formed in Early Ordovician,and maybe related to later diagenesis or regional tectono-thermal events.关键词
硫化物矿床/闪锌矿/Rb-Sr等时线定年/湘西,新晃打狗洞Key words
sulphide mineral deposit/Sphalerite/Rb-Sr isochrone dating/Dagoudong deposit,Xinhuang county,western Hunan province分类
天文与地球科学引用本文复制引用
杜国民,蔡红,梅玉萍..硫化物矿床中闪锌矿Rb-Sr等时线定年方法研究——以湘西新晃打狗洞铅锌矿床为例[J].华南地质与矿产,2012,28(2):175-180,6.基金项目
大调查项目《湘西、鄂西地区铅锌多金属矿勘查选区研究》资助 （）
