State Key Laboratory of Continental Dynamics;
Department of Geology;
Northwest University;
Xi’an 710069;
China;
Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources;
Institute of Geology;
Chinese Academy of Geological Sciences;
Beijing 100037;
China;
Chengji Middle School;
Jingning County;
Pingliang;
Gansu 743409;
China;