气候变化领域集成服务门户(CCPortal): Onset of the late Paleozoic glaciation in the Lhasa terrane, Southern Tibet

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DOI	10.1016/j.gloplacha.2023.104139
	Onset of the late Paleozoic glaciation in the Lhasa terrane, Southern Tibet
	An, Xianyin; Xu, Huan; He, Keheng; Xia, Lei; Du, Yan; Ding, Jiaxiang; Yuan, Tingyuan; Liu, Gaozheng; Zheng, Hongbo
发表日期	2023
ISSN	0921-8181
EISSN	1872-6364
卷号	225
英文摘要	The Late Paleozoic Ice Age is characterized by diverse stratigraphic records with extensive spatial-temporal distribution in the Gondwana. The Lhasa terrane located in northeastern Gondwana during the late Paleozoic developed successive glacial sedimentary records, but the depositional evidence, as well as age constraint for the onset of glaciation, is unknown. This paper provides the first full description of the basal glacial deposits in the Xainza area of Lhasa terrane, southern Tibet. Conodonts present in the carbonate overlying the glacial bed (1 m) dominantly consist of Declinognathodus intermedius, indicating that the initiation of the Late Paleozoic Ice Age in the Lhasa terrane took place in Bashkirian. Three facies associations were recognized: (i) tidal flat association (subtidal channel, bar, intertidal mixed flat), (ii) subglacial association (megaclasts and melt-out diamictite), and (iii) lonestone-bearing heterolithic association (grounding-line fan and iceberg). These facies associations are vertically arranged into a complete transgressive-retrogressive glacial succession. Ice movement direction reconstructed from the imbricated megaclasts, the concordant folds and the lateral distribution of subglacial deposits and glacial marine deposits is consistently from NNE to SSW. These characteristics suggest that the Bashkirian glaciation in the Lhasa terrane is irrelevant to western Australia, implying that these two blocks were separated during the Late Carboniferous.
关键词	Late Paleozoic Ice Age Lhasa terrane Bashkirian Glacial succession Western Australia
英文关键词	KINGSTON PEAK FORMATION; ZIRCON U-PB; TECTONIC EVOLUTION; DENSITY FLOWS; BAOSHAN BLOCK; DEATH-VALLEY; SEA-LEVEL; ICE-AGE; RECORD; DEPOSITS
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001010588900001
来源期刊	GLOBAL AND PLANETARY CHANGE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283057
作者单位	Yunnan University; China Geological Survey; Chengdu Center, China Geological Survey; Yunnan University; University of Queensland; Yunnan University; Griffith University
推荐引用方式 GB/T 7714	An, Xianyin,Xu, Huan,He, Keheng,et al. Onset of the late Paleozoic glaciation in the Lhasa terrane, Southern Tibet[J],2023,225.
APA	An, Xianyin.,Xu, Huan.,He, Keheng.,Xia, Lei.,Du, Yan.,...&Zheng, Hongbo.(2023).Onset of the late Paleozoic glaciation in the Lhasa terrane, Southern Tibet.GLOBAL AND PLANETARY CHANGE,225.
MLA	An, Xianyin,et al."Onset of the late Paleozoic glaciation in the Lhasa terrane, Southern Tibet".GLOBAL AND PLANETARY CHANGE 225(2023).