Personnel Division;
Changchun University;
Changchun 130022;
China;
Collegr of Earth Sciences;
Jilin University;
Changchun 130001;
CCina;
Geoloficci Surven of Jilin Province;
Changchun 130061;
China;
zircon U-Pb dating; geochemistry; Hf isotopes; Baishidong; skarn-type iron deposit; Helong; Yanbian;