the National Natural Science Foundations of China(No.40672018);the Ministry of Technology and Science of China(2006C13806401);Chinese National Committee on Stratigraphy Special Science and Technology Foundation of Guizhou.(Gui.Sci.Ji2007-4004);International cooperation Project of Guizhou Science and Technology(G.[2008]700110);国家自然科学基金(No.40672008);科技部科技基础工作专项(2006FY120300-4)资助