1. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education; Faculty of Resources; China University of Geosciences; Wuhan 430074 China
2. Department of Marine Science and Engineering; Faculty of Resources; China University of Geosciences; Wuhan 430074 China
3. Department of Earth Sciences; University of Oxford; Oxford OX1 3AN UK
4. Department of Geosciences; Centre for Earth System Research and Sustainability; University of Hamburg; Bundesstrasse 55 20146 Hamburg Germany
5. Sanya Institute of Deep-sea Science and Engineering; Chinese Academy of Sciences; Sanya 572000 China
6. PetroChina Hangzhou Institute of Geology; Hangzhou 310023 China