I get a kick from Isotopic stuff, and this is even better Barium Isotope Fingerprint for Recycled Ancient Sediment in the Source of EM1‐Type Continental Basalts Yi‐Shan Cheng1,2, Jian‐Qiang Liu1 , Li‐Hui Chen1 , Kai‐Yun Chen1, Jian Zhao1 , Xiao‐Jun Wang1, Gang Zeng3 , and Hong‐Fu Zhang2