1. Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources; Qingdao Institute of Marine Geology, China Geological Survey; Qingdao 266071 China
2. Laboratory for Marine Mineral Resources; Qingdao National Laboratory for Marine Science and Technology; Qingdao 266071 China
3. State Key Laboratory of Marine Geology, School of Ocean and Earth Science; Tongji University; Shanghai 200092 China
4. Key Laboratory of Marine Mineral Resources, Ministry of Land and Resources; Guangzhou Marine Geological Survey; Guangzhou 510760 China
5. Third Institute of Oceanography; State Oceanic Administration; Xiamen Fujian 361005 China