Paleoproterozoic transition in tectonic regime recorded by the Eastern Block of the North China Craton: evidence from detrital zircons of the Langzishan Formation, Jiao-Liao-Ji Belt

The Eastern Block of the North China Craton records Paleoproterozoic oceanic plate subduction, the opening and subsequent closure of a back-arc basin, and a following collisional orogenic event to generate the Jiao-Liao-Ji Belt (JLJB). However, the processes involved in the initiation of subduction remain unclear. This study presents U–Pb age and trace elemental data for detrital zircons from the Langzishan Formation, the lowermost sedimentary...