CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China;
State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China;
The Institute of Research and Exploration for Oil and Natural Gas China Chief Oil and NaturalGas Corporation Beijing 100083 China;
Contact metamorphism; CO2 degassing; CO2 accumulations; Tan-Lu fault belt;