The Nd-Sr isotope study of Mesozoic granitoids in Jiangxi Province

查看全文 作　　者：Weizhou Shen;Hongfei Ling;Wuxian Li;Dezi Wang;Xuan Huang;Jun Pan 机构地区：[1]Nanjing Univ, Dept Earth Sci, Nanjing 210093, Peoples R China;[2]Chinese Acad Sci, Inst Geol, Beijing 100029, Peoples R China; 出　　处：《Chinese Science Bulletin》索引1999年第44卷第15期,共5页 摘　　要：Nd-Sr isotopic compositions of 12 Mesozoic granitoids from Jiangxi Province have been reported. They show loe-ε_ND(-13.8—- 8.3), high-l_sr(0.71069—0.73981) and old t_DM (2087—1635 Ma). Comparison between the Sm-Nd isotopic compositions of the granitoids and those of the basement metamorphic rocks suggests that these granitoids were mainly derived from the metasedimentary rocks. There is an east-west trend Mesozoic granitoid zone with lowt_DM from S. Jiangxi to S. Fujian. The origin of these granites was preliminarily discussed. 关 键 词：ND-SR ISOTOPIC COMPOSITIONS material source low-tDM zone MESOZOIC GRANITOIDS Jiangxi Province.