| Institution: | 1 Key Laboratory of Petroleum Resources, Gansu Province/ Key Laboratory of Petroleum Resources Research, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,2 Key Laboratory of Mineral Resources in Western China (Gansu Province) and School of Earth Science, Lanzhou University, Lanzhou 730000, China,2 Key Laboratory of Mineral Resources in Western China (Gansu Province) and School of Earth Science, Lanzhou University, Lanzhou 730000, China,1 Key Laboratory of Petroleum Resources, Gansu Province/ Key Laboratory of Petroleum Resources Research, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China and 3 Division of Paleobotany, Peabody Museum of Natural History, Yale University, New Haven, Connecticut, USA |
