College of Earth Sciences;
Jilin University;
Changchun130061;
China;
Heilongjiang Institute of Geological Survey;
Harbin150036;
China;
State Key Laboratory of Environmental Geochemistry;
Institute of Geochemistry;
Chinese Academy of Sciences;
Guiyang550081;
China;
Faculty of Earth Sciences;
China University of Geosciences;
Wuhan430074;
China;
Early; Ordovician; A-type; granite; Songnen; and; Xing’an; blocks; Geodynamic; setting;