Key Laboratory for MetaUogenic Dynamics;
Guangzhou Institute of Geochemistry;
Chinese Academy of Sciences;
Guangzhou 510640;
China;
Key Laboratory of Isotope Geochronology and Geochemistry;
Guangzhou Institute of Geochemistry;
Chinese Academy of Sciences;
Guangzhou 510640;
China;
Henan Institute of Geological Survey;
Zhenzhou 450007;
China;