1. Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan, Hubei 430074, China
2. College of Marine Science and Technology, China University of Geosciences, Wuhan, Hubei 430074, China
3. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
4. Shandong Provincial Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, Shandong 266580, China
5. Department of Earth, Ocean and Ecological Sciences, University of Liverpool, Liverpool L69 3GP, U.K.