Zircon U-Pb-Hf isotope and whole-rock geochemical analysis of the Paleoproterozoic Orosirian metagranitoid and mafic xenolith in the southwestern part of the Yeongnam Massif, South Korea

Multiple magmatic and metamorphic events occurred in northeast Asia during the Orosirian period. Orosirian multiple magmatic and metamorphic events are also known to provide information about the amalgamation and break-up of the Columbia/Nuna supercontinent. The Yeongnam Massif, one of the Paleoproterozoic tectonic provinces in the Korean Peninsula, is known to have undergone two magmatic activities during ca. 2.02-1.86 Ga. This study focused on the Orosirian metagranitoid and amphibolite in the Gangjin-Wando-Jangheung area in the southwestern part of the Yeongnam Massif. In this study, we conducted the zircon Lu-Hf isotope analysis, the whole-rock geochemical analysis, and zircon U-Pb dating for metagranitoid and mafic xenoliths. Our study, a detailed investigation into the emplacement timing and petrogenesis of the Orosirian metagranitoid and mafic xenoliths in the study area, can provide crucial insights into the Orosirian multiple magmatic activities in the Yeongnam Massif along with their tectonic implications.