基金Supported by the National Natural Science Foundation of China under Grant Nos.60473037,60483081,40275034,60204001,60133010(国家自然科学基金)the China Postdoctoral Science Foundation under Grant No.2003034505(中国博士后科学基金)the open research program of the Geological Processes and Mineral Resources(GPMR),China University of Geosciences under Grant No.GPMR200618(中国地质大学地质过程与矿产资源国家重点实验室开放课题)