1. School of Earth Sciences, Yunnan University, Kunming650500, China
2. Western Australian School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, Western Australia6102, Australia
3. Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing100037, China
4. College of Energy, Chengdu University of Technology, Chengdu, Sichuan610059, China
5. Institute of energy, Peking University, Beijing100871, China
6. Department of atmospheric and earth sciences, Central Michigan University, Mt Pleasant, Michigan48859, United States