气候变化领域集成服务门户(CCPortal): Position of the Tarim Craton in Gondwana: Constraints from Neoproterozoic to early Paleozoic strata in South Tarim, NW China

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DOI	10.1016/j.tecto.2021.228741
	Position of the Tarim Craton in Gondwana: Constraints from Neoproterozoic to early Paleozoic strata in South Tarim, NW China
	Wang P.; Zhao G.; Han Y.; Liu Q.; Yao J.; Yu S.
发表日期	2021
ISSN	00401951
卷号	803
英文摘要	Some Asian blocks were welded into Gondwana, whereas their positions in Gondwana are controversial, especially the Tarim Craton. This is mainly because the Tarim Craton is largely occupied by the Taklamakan desert and only a few rocks crop out along its margins. In this study, we investigate previously little-studied early Neoproterozoic to late Silurian strata, compile up-to-date published data in South Tarim and compare provenance between potential terranes to locate the position of the Tarim Craton in Gondwana. In South Tarim, detrital zircons are characterized by two prominent peaks at 950–750 and 550–450 Ma. Their εHf(t) values range from −20 to 10 (72% negative values) and 12 to 5 (75% negative values), respectively. In West Australia, two main peaks at 700–500 and 1200–1100 Ma characterize Neoproterozoic to early Paleozoic strata and the 950–750 Ma population featuring South Tarim is absent. In Arabia-Iran, zircons from Neoproterozoic-Ordovician strata are characterized by 1000–500 Ma ages with a main peak at ca. 660 Ma and predominantly positive εHf(t) values (65%). Instead, zircons from Neoproterozoic-Ordovician strata in North India are dominated by two main peaks at 1000–800 and 600–490 Ma. Their εHf(t) values range from −20 to 10 (66% negative values), and − 15 to 5 (77% negative values), respectively. Therefore, well comparable age spectra and Hf isotopic compositions suggest a close linkage of South Tarim and North India in Gondwana. Additionally, our results also identify Mesoproterozoic basement rocks in the South Western Kunlun Terrane, southwestern Tarim. The 487 ± 7 Ma andesitic lava sample with εHf(t) values clustering 10 to 15 formed during retreating subduction indicates that the northward subduction of the Proto-Tethys oceanic lithosphere initiated prior to 487 ± 7 Ma © 2021 Elsevier B.V.
关键词	Detrital zircon ages Gondwana Kunlun Tarim Zircon Hf isotope
英文关键词	Geophysics; Basement rocks; Detrital zircon; Early Paleozoic; Isotopic composition; Negative values; Neoproterozoic; North India; Tethys oceanic lithospheres; Physics; continental margin; detrital deposit; Gondwana; hafnium; provenance; subduction; zircon; China; Tarim Block; Tethys
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208085
作者单位	Department of Earth Sciences, The University of Hong Kong, Road, Pokfulam, Hong Kong; State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Northern Taibai Street 229, Xi'an, 710069, China; International Research Fellow of Japan Society for the Promotion of Science (Postdoctoral Fellowships for Research in, Japan; Graduate School of Life and Environmental Sciences, The University of Tsukuba, Ibaraki, 305-8572, Japan
推荐引用方式 GB/T 7714	Wang P.,Zhao G.,Han Y.,et al. Position of the Tarim Craton in Gondwana: Constraints from Neoproterozoic to early Paleozoic strata in South Tarim, NW China[J],2021,803.
APA	Wang P.,Zhao G.,Han Y.,Liu Q.,Yao J.,&Yu S..(2021).Position of the Tarim Craton in Gondwana: Constraints from Neoproterozoic to early Paleozoic strata in South Tarim, NW China.Tectonophysics,803.
MLA	Wang P.,et al."Position of the Tarim Craton in Gondwana: Constraints from Neoproterozoic to early Paleozoic strata in South Tarim, NW China".Tectonophysics 803(2021).