New Potential Barite Reference Materials for LA-MC-ICP-MS Sulfur Isotope Analysis with Application to Hydrothermal Barite in the Huayangchuan Deposit,Western China  

作　　者：Jiali Fu Xinqian He Zhaochu Hu Shuo Yin Jian Ma Kaiyun Chen Wen Zhang 

机构地区：[1]National Key Laboratory of Uranium Resource Exploration-Mining andNuclear Remote Sensing,East China UniversityofTechnology,Nanchang 330013,China [2]State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China [3]School of Earth Sciences,East China University of Technology,Nanchang 330013,China [4]State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430078,China [5]State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University,Xi'an 710069,China

出　　处：《Journal of Earth Science》2025年第1期1-10,共10页地球科学学刊(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.42003014,42363004,42073051,42303023);Jiangxi Provincial Natural Science Foundation(No.20232BAB213070);the Natural Science Foundation of Shandong Province(No.ZR2022QD050)。

摘　　要：Sulfur isotopes of S-bearing materials are powerful tools to trace various geological processes and sulfur sources in earth sciences,especially in ore deposits where sulfide-sulfate pair coprecipitates widely.However,in-situ S isotope determination of barite is challenging without natural matrix-matched reference material.In this study,we present two natural barite reference materials(1-YS and 294-YS)for in-situ sulfur isotopic analysis.Independent LA-MC-ICP-MS laboratories were utilized to test theδ34S micron-scale homogeneity of 1-YS and 294-YS barites that have 2s repeatabilities of better than±0.45‰and±0.41‰,respectively.Meanwhile,the in-situ analysis results are consistent with the results of the bulk analysis by GS-IRMS within uncertainty.The grand meanδ~(34)S values of 1-YS(13.37‰±0.42‰,2s)and 294-YS(14.38‰±0.44‰,2s)are the final recommended values obtained from four independent laboratories.All the results confirm the suitability of 1-YS and 294-YS barite used as calibration materials with respect to in-situ S isotopic analysis.Moreover,the new developed barite reference materials were used as matrix-matched standard to calibrate the barite samples from the Huayangchuan carbonatite-hosted U-polymetallic deposit(Qinling orogenic belt,western China)to obtainδ34S values.Utilizing the temperaturedependentδ34S fractionation of barite-pyrite pair,we calculate the formation temperature of barite(i.e.,506 to 537°C)and theδ34S value of mineralizing fluid(i.e.,-7.11‰to-7.59‰)in the Huayangchuan deposit.The results indicate an involvement of sedimentary sulfur,presumably acting as a potential uranium source(e.g.,upper crustal materials)for the giant Huayangchuan deposit.

关 键 词：LA-MC-ICP-MS S isotope reference material BARITE GEOTHERMOMETRY 

分 类 号：P619.251[天文地球—矿床学]