Possible link between the oldest supracrustal unit and the oldest rock unit of China

Caozhuang Group (or Caozhuang supracrustal sequence) in Eastern Hebei, North China Craton (NCC) may represent the oldest supracrustal unit of China. Abundant Eoarchean and Paleoarchean detrital zircons (up to 3.88 Ga) in paragneisses of Caozhuang Group provide valuable memories of the earliest crustal evolution of China. There still remains confusion about the deposition time of the Caozhuang group, the origin and the igneous host rocks of their...