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 

作者机构：National Key Laboratory of Prospecting Mining and Remote Sense Detecting on Uranium Resources East China University of Technology State Key Laboratory of Nuclear Resources and Environment East China University of Technology School of Earth Sciences East China University of Technology State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan State Key Laboratory of Continental Dynamics Department of Geo logy Northwest University 

出 版 物：《Journal of Earth Science》 (地球科学学刊)

年 卷 期：2024年

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the National Natural Science Foundation of China (Grands 42003014, 42363004, 42073051, 42303023) the Natural Science Foundation of Jiangxi Province (20232BAB213070) the Natural Science Foundation of Shandong Province (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 the δ34S 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 mean δ34S 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 obtain δ34S values. Utilizing the temperature-dependent δ34S fractionation of barite-pyrite pair， we calculate the formation temperature of barite （i.e.， 506 to 537 ℃） and the δ34S 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.