Funding for this research was provided by:
China National 973 Project (2015CB453200)
National Natural Science Foundation of China (41420104002)
Directorate for Geosciences (AGS-1540783)
National Research Foundation of Korea (2011-0021927)
Article History
Received: 2 September 2017
Accepted: 29 November 2017
First Online: 9 December 2017