气候变化领域集成服务门户(CCPortal): Evolution of the Sumdo Paleo-Tethyan Ocean: Constraints from Permian Luobadui Formation in Lhasa terrane, South Tibet

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DOI	10.1016/j.palaeo.2022.110974
	Evolution of the Sumdo Paleo-Tethyan Ocean: Constraints from Permian Luobadui Formation in Lhasa terrane, South Tibet
	Wang, Chao; Ding, Lin; Cai, Fu-Long; Wang, Hou-Qi; Zhang, Li-Yun; Yue, Ya-Hui
通讯作者	Wang, C (通讯作者)
发表日期	2022
ISSN	0031-0182
EISSN	1872-616X
卷号	595
英文摘要	Reconstructing the evolution of the Sumdo Paleo-Tethyan Ocean (SPTO) is important for understanding the transition from the Paleo-Tethyan system to the Neo-Tethyan system. The existence of the SPTO is inferred from the presence of an (ultra-)high pressure metamorphic belt and dismembered ophiolite bodies that separate the southern Lhasa and northern Lhasa terrane. This paper presents new geochronological and geochemical data for the Luobadui Formation in the Lhasa terrane. The geochemical difference between the Lower Luobadui volcanics and the Upper Luobadui volcanics suggests a source transition from a depleted mantle source to an enriched mantle source, which indicates continental-arc subduction. The integrated geological evidence suggests that the SPTO initially opened during the late Carboniferous (ca. 304 Ma), as verified by the earliest record of oceanic crust. Our new data for the Luobadui volcanic rocks, together with the metamorphic and sedimentary records, support northward subduction of the SPTO lithosphere beneath North Lhasa, most likely starting during the Early Permian (ca. 275 Ma) and lasting until the Middle Permian (ca. 260 Ma). The main closure of the SPTO occurred during Middle-Late Triassic (ca. 240-220 Ma), as recorded by medium-pressure metamorphism and syn-colli-sional magmatism. The Wilson cycle of the SPTO is hereby reconstructed, providing significant insights into the amalgamation of the Tibetan Plateau.
关键词	EARLY CARBONIFEROUS GRANITOIDS ZIRCON U-PB TRACE-ELEMENT DETRITAL ZIRCONS INDOSINIAN OROGENESIS TECTONIC SIGNIFICANCE ISOTOPIC COMPOSITION VOLCANIC-ROCKS GANGDESE BELT ISLAND-ARC
英文关键词	Sumdo Paleo-Tethyan Ocean; Luobadui Formation; Lhasa terrane; Subduction; Tibet
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000802957200001
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260571
推荐引用方式 GB/T 7714	Wang, Chao,Ding, Lin,Cai, Fu-Long,et al. Evolution of the Sumdo Paleo-Tethyan Ocean: Constraints from Permian Luobadui Formation in Lhasa terrane, South Tibet[J]. 中国科学院青藏高原研究所,2022,595.
APA	Wang, Chao,Ding, Lin,Cai, Fu-Long,Wang, Hou-Qi,Zhang, Li-Yun,&Yue, Ya-Hui.(2022).Evolution of the Sumdo Paleo-Tethyan Ocean: Constraints from Permian Luobadui Formation in Lhasa terrane, South Tibet.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,595.
MLA	Wang, Chao,et al."Evolution of the Sumdo Paleo-Tethyan Ocean: Constraints from Permian Luobadui Formation in Lhasa terrane, South Tibet".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 595(2022).