Funding for this research was provided by:
National Natural Science Foundation of China (91528303)
Outstanding Youth Funding of Natural Science Foundation of Hubei Province (2016CFA055)
Wuhan Science and Technology Project (2016070204010145)
Fundamental Research Fund for the Central Universities, China University of Geosciences Wuhan (201536)
Article History
Received: 1 December 2017
Accepted: 2 April 2018
First Online: 24 April 2018