Funding for this research was provided by:
the National Natural Science Foundation of China (41474095)
the Open Foundation of Key Laboratory of Mineral Resources, Chinese Academy of Sciences (KLMR2015-09)
The National Key Research and Development Program of China (2017YFC0601204)
Article History
Received: 13 May 2017
Accepted: 22 December 2018
First Online: 3 January 2019