WANG Hongjie, MA Chi, ZHAO Haibo, GUO Feng, FENG Naiqi, WANG Panxi. U-Pb age of detrital zircons from Neoproterozoic metamorphic sedimentary rocks in Mazongshan, Gansu and its limitation to the sedimentary floor of the Beishan orogenic belt[J]. Geology in China, 2022, 49(1): 344-345(in Chinese with English abstract).