Submitted on: 02 March 2016.
Revised on: 23 March 2016.
Accepted on: 19 May 2016.
___________________Applied Earth Science-Transactions of the Institutions of Mining and Metallurgy
http://reply.papertrans.cn/1/22/2179/2179-12.png
http://reply.papertrans.cn/1/22/2179/2179-13.png
Submitted on: 17 January 2016.
Revised on: 11 March 2016.
Accepted on: 30 March 2016.
___________________Applied Earth Science-Transactions of the Institutions of Mining and Metallurgy
http://reply.papertrans.cn/1/22/2179/2179-15.png
http://reply.papertrans.cn/1/22/2179/2179-16.png
http://reply.papertrans.cn/1/22/2179/2179-17.png
http://reply.papertrans.cn/1/22/2179/2179-18.png
Submitted on: 28 September 2016.
Revised on: 27 October 2016.
Accepted on: 17 December 2016.
___________________Applied Earth Science-Transactions of the Institutions of Mining and Metallurgy
Submitted on: 19 July 2000.
Revised on: 20 October 2000.
Accepted on: 12 December 2000.
___________________Applied Earth Science-Transactions of the Institutions of Mining and Metallurgy