1. College of Earth Sciences & Engineering, Shandong University of Science and Technology, Qingdao266590, China
2. Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao266071, China
3. School of Resources and Earth Science, China University of Mining and Technology, Xuzhou221116, China
4. 113 Team of Guizhou Coal Geology Bureau, Guiyang550000, China
5. The First Exploration Team of Shandong Province Coal Geology Bureau, Qingdao, Shandong266000, China