School of Earth and Space Sciences, Peking University, Beijing 100871, China;
Shijiazhuang University of Economics, Shijiazhuang 050031, China;
Geological Bureau of Inner Mongolia, Huhhot 010020, China;
Shijiazhuang University of Economics, Shijiazhuang 050031, China;
Zhang-Xuan area; underplating; thermal uplift; fission track; extensional structure;