A New Discovery of Cretaceous (∼125 Ma) Migmatite in Liaodong Peninsula, North China Craton

Abstract

The North China Craton (NCC), especially it’s eastern region, had experienced extensive lithospheric thinning during Mesozoic (Zhu et al., 2011). Liaodong Peninsula is an important constituent of the eastern NCC, and recorded intensive lithospheric thinning-related magmatism and extensional deformation (e.g. metamorphic core complex; Liu et al., 2008; Zheng et al., 2018). Previous studies revealed that the activity of lithospheric thinning and cratonic destruction had reached the peak at ~125 Ma (Zhu et al., 2011). However, none of related Cretaceous metamorphic ages from Liaodong Peninsula had been reported yet. For the first time, we report a ~125 Ma anatectic age of a migmatite outcrop from the Shendianzi Village in Dandong city, Eastern Liaoning Province, China (GPS location: 40°10′33′′N, 123°51′48′′E). Combining with previous studies, we suggest that this ~125 Ma migmatite was resulted from partial melting related to the lithospheric thinning of the NCC during Cretaceous.