国家自然科学基金41374028,40674001;国土资源大调查项目1212010914015;中央高校基本科研业务费专项资金CHD2012TD004;The National Natural Science Foundation of China,Nos.41374028,40674001;the Project of Country Resource Investigation,No.1212010914015;the Central University Basic Scientific Research Business Expenses Special Funds,No.CHD2012TD004.