气候变化领域集成服务门户(CCPortal): RETRACTED: Late Permian to early Triassic gabbro in North Lhasa, Tibet: evidence for plume - subduction-zone interaction of the Palaeo-Tethys ocean (Retracted article. See MAR, 2023)

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DOI	10.1017/S0016756822001182
	RETRACTED: Late Permian to early Triassic gabbro in North Lhasa, Tibet: evidence for plume - subduction-zone interaction of the Palaeo-Tethys ocean (Retracted article. See MAR, 2023)
	Duan, Meng-Long; Xie, Chao-Ming; Wang, Bin; Song, Yu-Hang; Li, Wen-qing; Hao, Yu-jie
发表日期	2023
ISSN	0016-7568
EISSN	1469-5081
起始页码	393
结束页码	408
卷号	160 期号:2
英文摘要	The Palaeo-Mesozoic geodynamic evolution of the Tangjia-Sumdo accretionary complex belt, which separates the North and South Lhasa Terrane, remains controversial. Moreover, the lack of geological records restricts the understanding of the evolution of the Sumdo Palaeo-Tethys Ocean from the middle Permian until the middle Triassic. Here we present zircon U-Pb geochronology, whole-rock geochemistry and Sr-Nd-Hf isotopic compositions of the Yeqing gabbro. Zircon U-Pb geochronology yields ages from 254 +/- 1 to 249 +/- 1 Ma. In situ Hf isotopic analyses yield epsilon(Hf)(t) values of -0.2 to +6.3. These samples have high TiO2 (3.69 wt %) and P2O5 (0.78 wt %) contents, with typical patterns like ocean island basalt (OIB). Besides, they are classified as high-Nb basalts (HNBs) based on the high content of Nb (45.3-113.5 ppm). Whole-rock Sr-Nd isotopic compositions are similar to OIB, with initial Sr-87/Sr-86 of 0.7047-0.7054, Nd-143/Nd-144 of 0.512526-0.512647 and epsilon(Nd)(t) of 0.3-2.7. These signatures suggest that the Yeqing gabbro is mainly derived from low-degree melting of the garnet lherzolite mantle. Based on field observations of HNBs intruding into the continental margin and their geochemical characteristics, we infer that the Yeqing gabbro was generated in a subduction environment. Combined with the regional geology of the subduction environment and the evolution of oceanic islands in the Sumdo Palaeo-Tethys Ocean, we propose that the Yeqing gabbro may represent a product of the asthenosphere upwelling through a slab window produced by subduction of seismic ridge in the Sumdo Palaeo-Tethys Ocean, called plume - subduction-zone interaction, during the late Permian to early Triassic.
关键词	Lhasa terrane Sumdo Palaeo-Tethys Ocean OIB geochemistry geochronology
英文关键词	ZIRCON U-PB; STRENGTH ELEMENT ENRICHMENT; QUINTIN VOLCANIC FIELD; HF ISOTOPIC ANALYSES; BAJA-CALIFORNIA; LU-HF; QIANGTANG TERRANE; TRACE-ELEMENTS; COSTA-RICA; GEOLOGICAL SIGNIFICANCE
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:000916007500001
来源期刊	GEOLOGICAL MAGAZINE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283572
作者单位	Jilin University; Jilin University; Ministry of Natural Resources of the People's Republic of China; Jilin University
推荐引用方式 GB/T 7714	Duan, Meng-Long,Xie, Chao-Ming,Wang, Bin,et al. RETRACTED: Late Permian to early Triassic gabbro in North Lhasa, Tibet: evidence for plume - subduction-zone interaction of the Palaeo-Tethys ocean (Retracted article. See MAR, 2023)[J],2023,160(2).
APA	Duan, Meng-Long,Xie, Chao-Ming,Wang, Bin,Song, Yu-Hang,Li, Wen-qing,&Hao, Yu-jie.(2023).RETRACTED: Late Permian to early Triassic gabbro in North Lhasa, Tibet: evidence for plume - subduction-zone interaction of the Palaeo-Tethys ocean (Retracted article. See MAR, 2023).GEOLOGICAL MAGAZINE,160(2).
MLA	Duan, Meng-Long,et al."RETRACTED: Late Permian to early Triassic gabbro in North Lhasa, Tibet: evidence for plume - subduction-zone interaction of the Palaeo-Tethys ocean (Retracted article. See MAR, 2023)".GEOLOGICAL MAGAZINE 160.2(2023).