Sr-Nd Isotopic Characteristics of Jurassic Granites in Northeastern Da Hinggan Mountains and Their Geological Implicationsoft-com:office:office" />

• 责任者：Sui Zhenmin (College of Resources and Environmental Science ; Jilin Agricultural University ; Changchun 130118 ; China) ; Xu Xuechun
• 刊名：Geology in China
• 出版年：2010
• 卷期：37(1)
• 关键词：花岗岩 ; granite ; 大兴安岭 ; Greater Hinggan Mountains
• 页码：p.48-55
• 图表：2 illus., 2 tables, 22 refs.
• 分类号：0801
• issnNo：ISSN1000-3657
• isbnNo：CN11-1167/P

Sr-Nd isotopic data of the Jurassic granites in northeastern Da Hinggan Mountains show that Xing’an massif has relatively low initial Sr (0. 7048～0. 7065), high εNd (t) (+0. 23～+2. 54), and low TDM2 (0. 76～0. 95 Ga), suggesting that their source materials were mainly crustal materials derived from the depleted mantle during Phanerozoic. In contrast, Jurassic granites in Ergun massif have relatively high initial Sr (0.7057～0.7075), low εNd (t) (-2.47～-9.72), and high TDM2 (1.16～1.7 Ga), implying that their source materials were mainly crustal materials derived from the depleted mantle in Meso-Neo-Proterozoic. Different crustal accretion periods of Ergun and Xing’an massifs suggest they have different early crustal evolution histories. oft-com:office:office" />