1. Institute of Energy, Peking University , Beijing 100871 , China
2. Key Laboratory of Petroleum Geochemistry, Central Laboratory of Geological Sciences, Research Institute of Petroleum Exploration and Development, China National Petroleum Corporation , Beijing 100083 , China
3. Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University , Beijing 100871 , China