Funding for this research was provided by:
The National Key Research and Development Program of China (2017YFC0602704)
National Natural Science Foundation of China (41603048)
National Natural Science Foundation of China (U1407207)
Projects of China Geological Survey (DD20160025)
Article History
Received: 11 December 2017
Accepted: 11 March 2018
First Online: 31 March 2018