“…Cenozoic lithospheric evolution beneath the eastern NCC has not been well recognized in the previous studies, primarily because: (1) Seismic tomography revealed the thinnest lithosphere beneath the Bohai Bay Basin, the largest Cenozoic basin in the eastern NCC (Chen, 2010;Tian et al, 2009), but few geochemical and age data are available on basalts from the Bohai Bay Basin because of limited exposure (Xu et al, 2004a); (2) Most studies have focused on the magmatism in the Early Cretaceous (e.g., Gao et al, 2008;Guo et al, 2001;Huang et al, 2012;Xu et al, 2004b;Yang and Li, 2008;Zhang et al, 2002) and Late Cenozoic (b23 Ma) (e.g., Chen et al, 2007;Fan and Hooper, 1991;Song et al, 1990;Tang et al, 2006;Xu et al, 2004aXu et al, , 2005; Y.G. Zeng et al, 2010Zeng et al, , 2011Zhang et al, 2009;Zhi et al, 1990;Zhou and Armstrong, 1982), but there are few studies on the Early Cenozoic (66-23 Ma) basaltic rocks (Dong et al, 2010;Guo et al, 2006;C.Z. Wu et al, 2005).…”