Funding for this research was provided by:
Project supported by Geological prospecting fund of Guizhou province ((2015-21))
Scientific cooperation fund of Guizhou Province, China ((2015)-5, (2016)-5, [2017]-1029.)
Article History
Received: 28 November 2017
Revised: 19 April 2018
Accepted: 18 May 2018
First Online: 7 June 2018