Funding for this research was provided by:
National Natural Science Foundation of China (41302276, 41661144037)
National Key Research and Development Program of China (2017YFB0504104)
Ministry of Land and Resources of China, Key Laboratory of Loess Geological Hazard, Open Fund Project (KLGLAMLR201603)
Xi’an University of Science and Technology (post) to Start the Gold Project (2015QDJ085)
Article History
Received: 27 December 2018
Accepted: 4 July 2019
First Online: 17 July 2019