DOI: 10.1016/j.tecto.2021.228741
论文题名: Position of the Tarim Craton in Gondwana: Constraints from Neoproterozoic to early Paleozoic strata in South Tarim, NW China
作者: Wang P. ; Zhao G. ; Han Y. ; Liu Q. ; Yao J. ; Yu S.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 803 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170918
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Tectonophysics,2021-01-01,803