Guangzhou Institute of Geochemistry;
Chinese Academy of Sciences;
Guangzhou;
Guangdong 510040;
China University of Geosciences;
Wuhan;
Hubei 430074;
Geology and Mineral Bureau of Hubei Province;
Wuhan;
Hubei 430070;
Pb; The Mesozoic Welding Process between South and North Dabie Blocks;