State;
Key;
Laboratory;
of;
Continental;
Dynamics,;
Department;
of;
Geology,;
Northwest;
University,;
Xi'an;
710069,;
China;
State;
Key;
Laboratory;
of;
Continental;
Dynamics,;
Department;
of;
Geology,;
Northwest;
University,;
Xi'an;
710069,;
China;
State;
Key;
Laboratory;
of;
Continental;
Dynamics,;
Department;
of;
Geology,;
Northwest;
University,;
Xi'an;
710069,;
China;
State;
Key;
Laboratory;
of;
Continental;
Dynamics,;
Department;
of;
Geology,;
Northwest;
University,;
Xi'an;
710069,;
China;
alkaline; basalt,; source; region; characteristics,; continental; dynamism,; Cenozoic,eastern; margin; of; Tibetan; Plateau;