Nd isotopic characteristics of Proterozoic metasedimentary rocks and   constraints on their provenance in the eastern segment of Central   Tianshan Belt, Xinjiang

doi:10.1080/10020070312331344630

CORC > 北京大学 > 地球与空间科学学院

	Nd isotopic characteristics of Proterozoic metasedimentary rocks and constraints on their provenance in the eastern segment of Central Tianshan Belt, Xinjiang
	Li, QG ; Liu, SW ; Han, BF ; Zhang, J ; Chu, ZY
刊名	progress in natural science
	2003
关键词	Nd isotopic features metasedimentary rocks Xingxingxia group provenance and forming time Tectonic setting the ESCTB of Xinjiang RARE-EARTH ELEMENTS CRUSTAL EVOLUTION SM-ND CONTINENTAL-CRUST NORTH-AMERICA SEDIMENTARY BASIN FRACTIONATION TURBIDITES MINNESOTA
DOI	10.1080/10020070312331344630
英文摘要	Sm-Nd isotopic characteristics, epsilon(Nd)(t) values and Nd model ages ( T-DM) of Proterozoic metasedimentary rocks in the eastern segment of Central Tianshan Belt (ESCTB), Xinjiang, are used to constrain the sedimentary provenance as well as to evaluate their tectonic implications. epsilon(Nd)(t) and T-DM values of these samples range from -4.00 to +6.36 and from 1.29 to 2.29 Ga, respectivety. These feature values are distinguished from those of Archean Tarim Craton. Their average epsilon(Nd)(t) values of the Weiya, the Kumishi and the south to the Dikar samples are -2.46, +2.06 and +1.37, respectively. Nd model ages of the Weiya samples vary between 1.86 and 2.29 Ga, but those of the Kumishi and the south to the Dikar samples show a significant concentration at 1.6 similar to 1.9 Ga and the youngest Nd model age is 1.29 Ga. Those Nd isotopic characteristics suggest that these metasedimentary rocks could be derived from a significant proportion of Paleoproterozoic crustal source and a participation of young arc materials, rather than Archean Tarim Craton. Furthermore, the data also indicate that these two sources were paleogeographically separated. Thus we can deduce that the Kumishi and the south to the Dikar metasedimentary rocks were formed proximal to the arc side of the back-arc basin, but the Weiya metasedimentary rocks were closer to the continental side of the back-arc basin.; Materials Science, Multidisciplinary; Multidisciplinary Sciences; SCI(E); 0; ARTICLE; 12; 908-913; 13
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/400640]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Li, QG,Liu, SW,Han, BF,et al. Nd isotopic characteristics of Proterozoic metasedimentary rocks and constraints on their provenance in the eastern segment of Central Tianshan Belt, Xinjiang[J]. progress in natural science,2003.
APA	Li, QG,Liu, SW,Han, BF,Zhang, J,&Chu, ZY.(2003).Nd isotopic characteristics of Proterozoic metasedimentary rocks and constraints on their provenance in the eastern segment of Central Tianshan Belt, Xinjiang.progress in natural science.
MLA	Li, QG,et al."Nd isotopic characteristics of Proterozoic metasedimentary rocks and constraints on their provenance in the eastern segment of Central Tianshan Belt, Xinjiang".progress in natural science (2003).