Geochemistry of late Mesozoic-Cenozoic basalts in Yitong-Datun area, NE China and its geodynamic implication

作     者：Hui-Huang Zhang Yi-Gang Xu Wen-Chun Ge and Jin-Long Ma Key Laboratory of Isotope Geochronology and Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences 510640 Guangzhou China Graduate University of Chinese Academy of Sciences 100049 Beijing China Department of Earth and Planetary Sciences Jilin University 130061 Changchun China 

会议名称：《International Conference on Continental Volcanism》

会议日期：2006年

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

摘      要：正Yitong-Datun region, where volcanic activity persisted for over 80 Ma, provides important constraints on the evolution of deep lithosphere beneath this part of Northeast China. From late Cretaceous （92.5 Ma） Datun basalt in Changchun to Tertiary （31Ma, 9-15Ma） basalts in Yitong-Shulan graben, alkaline contents and Dy/Yb ratios increase with