Note on the paper by Guochun Zhao, Simon A. Wilde, Sanzhong Li, Min Sun, Matthew L. Grant and Xuping Li, 2007, “U-Pb zircon age constraints on the Dongwanzi ultramafic-mafic body, North China, confirm it is not an Archean ophiolite”

Physical Sciences and Engineering Earth and Planetary Sciences Earth and Planetary Sciences (General)

T.M. Kusky, J.H. Li,