1Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, College of Earth
Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, P.R. China
2Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology,
Qingdao, Shandong 266071, P.R. China
Submission date: 2017-03-27
Final revision date: 2017-06-14
Acceptance date: 2017-07-11
Online publication date: 2018-01-08
Publication date: 2018-01-26
Pol. J. Environ. Stud. 2018;27(2):845–852