Funding for this research was provided by:
the National Natural Science Foundation of China (No.51501168, 41574175, 41204083)
the Fundamental Research Funds for the Central Universities, China University of Geosciences (No.CUG150632 and, CUGL160414)
Article History
Received: 30 July 2020
Accepted: 18 September 2020
First Online: 25 September 2020