<正>Rifted continental margins play a crucial role in understanding Earth’s tectonics[1].Their significance extends beyond elucidating the mechanisms of continental rifting and plate tectonics;they also hold substantial potential as reservoirs for mineral resources,hydrocarbons,and geothermal energy[2].The South China Sea(SCS) has undergone a comprehensive sequence of lithospheric stretching,thinning,breakup,and the formation of new oceanic crust.Unlike the classic magma-rich and magma-poor end-members observed in different parts of the Atlantic,the SCS rifted margin is considered to be of an intermediate type[3].In addition,the continental margin of the SCS was formed associated with the Late Mesozoic subduction of the paleo-Pacific Plate and subsequently underwent rifting tectonic transformation.The eastern,western,and southern sides of the SCS are now bordered by two major subduction zones:the western Pacific and the Indian Ocean[4].This evolutionary trajectory underpins a tectonic system fundamentally distinct from the Atlantic-type rifted margins,and a concept of SCS plate-edge rifting was proposed[5].