Geochronology And S-Pb-O-H Isotopic Constraints On The Generation Of The Luoyang Fe Deposit In Southwest Fujian Province,Sechina

The Luoyang Fe polymetallic deposit is a well-known Makeng-type ore deposit in a late Paleozoic basin in southwest Fujian, southeast China. To investigate the generation of Makeng-type Fe deposits, we conducted an integrated study of geochronology and S-Pb-O-H isotope compositions of the Luoyang Fe deposit. The LA-ICP-MS zircon U-Pb ages of the granite and Re-Os ages of the molybdenite suggest that the emplacement of the granite was coeval with the mineralization of the Luoyang deposit at 133-131 Ma. The H-O and S-Pb isotope compositions indicate that the metallogenic material of the Luoyang deposit had a magmatic hydrothermal source, and was derived mainly from the upper crust with a low degree of contamination of mantle material. The Pb isotope analyses of the ore minerals show that the Luoyang Fe deposit formed in an orogenic setting.