Combined garnet,scheelite and apatite U-Pb dating of mineralizing events in the Qiaomaishan Cu-W skarn deposit,eastern China
作者机构：Ore Deposit and Exploration Centre(ODEC)Hefei University of TechnologyHefei 23009China Anhui Province Engineering Research Center for Mineral Resources and Mine EnvironmentsHefei 23009China Department of GeoscienceUniversity of Nevada Las Vegas4505 S.Maryland Pkwy.NV 89154-4010USA
出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)
年 卷 期：2023年第14卷第1期
页 面：17-32页
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：the National Natural Science Foundation of China(Grant Nos.41820104007 91962218)and the China Scholarship Council(Grant No.201906690036)
主 题：In-situ scheelite U-Pb dating In-situ garnet U-Pb dating In-situ apatite U-Pb dating Qiaomaishan skarn deposit
摘 要：Determining the precise timing of mineralization and mineralizing events is crucial to understanding regional mineralizing and other geological events and ***,there are a number of mineralogical and analytical limitations to the approaches developed for the absolute dating of mineralizing systems,such as molybdenite Re-Os and zircon and garnet U-Pb,among *** means that the precise and accurate dating of mineralizing systems that may not contain minerals suitable for dating using existing approaches requires the development of new(and ideally in situ)approaches to absolute *** study outlines a new in situ analytical approach that has the potential to rapidly and accurately evaluate the timing of ore *** study employs a novel application of in situ scheelite U-Pb dating analysis using laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS)and samples from the Qiaomaishan deposit,a representative example of skarn mineralization within the Xuancheng ore district of eastern *** approach to scheelite dating of the deposit is verified by cross-comparison to dating of cogenetic garnet and apatite,proving the effectiveness of this *** new approach to dating of scheelite-bearing geological systems is rapid,cheap,requires little sample preparation,and is undertaken in situ,allowing crucial geological and mineralogical context to be retained during *** approaches outlined here not only allow the determination of the absolute timing of formation of the Qiaomaishan deposit through the U-Pb dating of scheelite[138.6±3.2 Ma,N=39,mean square weighted deviation(MSWD)=1.17],garnet(138.4±1.0 Ma,N=40,MSWD=1.3),and apatite(139.6+3.3 Ma,N=35,MSWD=0.72),but also further supports the theoretical genetic links between this mineralization and the emplacement of a proximal porphyritic granodiorite intrusion(zircon U-Pb age:139.5±1.2 Ma,N=23,MSWD=0.3).Moreover,our research indicates that the higher the concentrations
维普期刊数据库