气候变化领域集成服务门户(CCPortal): Linking rapid eruption of the Linzizong volcanic rocks and Early Eocene Climatic Optimum (EECO): Constraints from the Pana Formation in the Linzhou and Pangduo basins, southern Tibet

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DOI	10.1016/j.lithos.2023.107159
	Linking rapid eruption of the Linzizong volcanic rocks and Early Eocene Climatic Optimum (EECO): Constraints from the Pana Formation in the Linzhou and Pangduo basins, southern Tibet
	Zhang, Shao-Hua; Ji, Wei-Qiang; Chen, Hou-Bin; Kirstein, Linda A.; Wu, Fu-Yuan
发表日期	2023
ISSN	0024-4937
EISSN	1872-6143
卷号	446
英文摘要	Volcanic eruptions can release a large amount of volatiles, including sulfur dioxide and carbon dioxide, into the atmosphere and trigger regional and/or global perturbations of the climate and environment. However, the potential effect of the Linzizong volcanism, the most intense and widespread magmatism in southern Tibet, is not yet known. Here, the systematic results of fieldwork, spatial distribution analysis (area and volume), and zircon U-Pb age dating of 54 samples are reported from the Linzizong volcanic rocks (Dianzhong, Nianbo and Pana Formations) in the Linzhou and Pangduo basins, southern Tibet. Our new zircon U-Pb ages of 40 samples and compilations of previous data indicated that the Pana Formation erupted rapidly ca. 52-50 Ma, consistent with the coeval flare-up (-51 Ma) of the Gangdese batholith. The average eruption fluxes of the lower (Dianzhong Formation), middle (Nianbo Formation), and upper (Pana Formation) parts of the Linzizong volcanic sequence are 11.8, 1.44, and 3994 km3/Ma, respectively. Evidence including the high average eruption flux (3994 km3/ Ma), large magnitude (M = 8.80), and Volcanic Explosivity Index (VEI = 8) of the Pana Formation in the Linzhou and Pangduo basins suggests that this may represent a supereruption event in the Early Eocene. The rapid eruption of the Pana Formation was pervasive across the Tibetan Plateau and potentially extends to Sumatra, Southeast Asia, with consequences for the release of a large amount of CO2 that could drive the Early Eocene Climatic Optimum (EECO).
关键词	Linzizong volcanic rocks U-Pb age dating Rapid eruption Early Eocene Climatic Optimum
英文关键词	ZIRCON U-PB; GEOCHEMICAL CHARACTERISTICS; ISOTOPIC CONSTRAINTS; GANGDESE BATHOLITH; LHASA TERRANE; FLARE-UPS; ARC; CARBON; SUBDUCTION; HF
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
WOS记录号	WOS:000975906000001
来源期刊	LITHOS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283217
作者单位	Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; University of Edinburgh
推荐引用方式 GB/T 7714	Zhang, Shao-Hua,Ji, Wei-Qiang,Chen, Hou-Bin,et al. Linking rapid eruption of the Linzizong volcanic rocks and Early Eocene Climatic Optimum (EECO): Constraints from the Pana Formation in the Linzhou and Pangduo basins, southern Tibet[J],2023,446.
APA	Zhang, Shao-Hua,Ji, Wei-Qiang,Chen, Hou-Bin,Kirstein, Linda A.,&Wu, Fu-Yuan.(2023).Linking rapid eruption of the Linzizong volcanic rocks and Early Eocene Climatic Optimum (EECO): Constraints from the Pana Formation in the Linzhou and Pangduo basins, southern Tibet.LITHOS,446.
MLA	Zhang, Shao-Hua,et al."Linking rapid eruption of the Linzizong volcanic rocks and Early Eocene Climatic Optimum (EECO): Constraints from the Pana Formation in the Linzhou and Pangduo basins, southern Tibet".LITHOS 446(2023).