地质与勘探2017，Vol.53Issue(6)：1051-1060,10.
四川乌依铅矿床成矿物质来源:硫、铅同位素和方铅矿稀土元素地球化学制约
Ore-Forming Material Source of the Wuyi Lead Deposit in Sichuan Province:Constraints from Geochemistry of Sulfur,Lead Isotope and Galena Rare Earth Elements
摘要
Abstract
The Wuyi lead deposit is one of the typical Mississippi Valley type deposits occurred in the Ordovician Daqing Formation in the Sichuan-Yunnan-Guizhou neighboring region. To address the question about ore-forming material sources for this deposit,this work conducted a geochemical study on galena and gypsum sulfur isotopes and rare earth elements of galena. The results show that the average of galena sulfur isotope (δ34 S) is -4. 04‰(n=31)and gypsum sulfur isotope (δ34S)is 29‰(n=15). The rare earth elements of galena exhibit an enrichment of heavy rare earth elements and a deficit of light REE,and distribution pattern curves of REE are approximately of right deviation with positive Eu anomalies and negative Ce anoma-lies. In combination with previous sulfur and lead isotope data from this deposit,this study suggests that the sulfur of the Wuyi lead deposit was derived from reduction sulfate of stratum,and the ore-forming material source of the lead is not the Emeishan basalt,but the Ordovician Daqing Formation.关键词
硫同位素/铅同位素/稀土元素/铅矿床/乌依/布拖县/四川省Key words
sulfur isotope/lead isotope/REE lead deposit/Wuyi/Butuo County/Sichuan Province分类
天文与地球科学引用本文复制引用
谭洪旗,罗丽萍,徐刚,张迥,胡林,李海..四川乌依铅矿床成矿物质来源:硫、铅同位素和方铅矿稀土元素地球化学制约[J].地质与勘探,2017,53(6):1051-1060,10.基金项目
中国地质调查局地质调查项目(编号:1212010000150002)和国家自然科学基金项目(编号:41603034)资助. （编号:1212010000150002）
