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Zircon Hf-O isotopic constraints on the origin and temporal evolution of the Toba volcanic system, Indonesia

文献类型：期刊论文

作者Liu, Ping -Ping3; Chung, Sun-Lin1,4; Ma, Ben3; Li, Xian-Hua2; Li, Qiu-Li2; Lee, Hao-Yang1; Zhang, Xiao-Ran2
刊名LITHOS
出版日期2022-12-15
卷号434页码:7
ISSN号0024-4937
关键词Toba Caldera Zircon Hf isotopes O isotopes Magma source
DOI10.1016/j.lithos.2022.106925
英文摘要Combined U-Pb-Hf-O isotopic analyses of zircons are useful probes to investigate the origin and temporal evo-lution of long-lived magma reservoirs feeding large eruptions. This study presents a complete dataset of zircon Hf-O isotopes of the latest five Toba eruptions in the Quaternary. The new isotopic data differ slightly within and between eruptive units, with the majority of zircons having epsilon Hf values between-8 to-5 and 818O values be-tween 6 and 6.8. These Hf-O isotopic compositions of zircons were considered to inherit from an enriched and slightly heterogenous magma source. Specifically, zircons of the Oldest Toba Tuff (OTT) have rather restricted and constant Hf-O isotopes, which may crystallize from a reservoir protractedly supplied from the same magma source. Zircons of the Middle Toba Tuff (MTT) have a large range of 818O values varying from-6 to 8, with low epsilon Hf values extending to-14, indicating shallow-level crustal contamination. The largely negative correlations between epsilon Hf and 818O for zircons from the MTT are indicative of contamination of high-818O crustal materials, whereas those of the positive correlations for zircons from the Youngest Toba Tuff (YTT) imply contamination of hydrothermally altered low-818O crustal materials. It is important that the Hf-O isotopes of all the zircons do not record any single batch of magma that was derived from partial melting of depleted mantle peridotites, but are consistent with an enriched and heterogenous mantle source hybridized by the subducted sediments, followed by contamination of low-818O or high-818O materials during their ascent to the surface or storage in the shallow magma reservoirs. The increase of zircon 818O values towards eruptions in both the MTT and YTT suggests that the two eruptions might be accompanied by roof collapse that added high-818O materials to the magma. Thus, assimilation of high-818O crustal materials could be a possible trigger for the MTT and YTT eruptions.
WOS关键词SATURATION ; SUMATRA ; STORAGE ; TUFFS ; STRATIGRAPHY ; ERUPTIONS ; INSIGHTS ; RECHARGE ; HISTORY ; TRIGGER
资助项目National Science Foundation of China[41872058] ; Ministry of Science and Technology, Taiwan ; Academia Sinica
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者ELSEVIER
WOS记录号WOS:000907643400001
资助机构National Science Foundation of China ; National Science Foundation of China ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Academia Sinica ; Academia Sinica ; National Science Foundation of China ; National Science Foundation of China ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Academia Sinica ; Academia Sinica ; National Science Foundation of China ; National Science Foundation of China ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Academia Sinica ; Academia Sinica ; National Science Foundation of China ; National Science Foundation of China ; Ministry of Science and Technology, Taiwan ; Ministry of Science and Technology, Taiwan ; Academia Sinica ; Academia Sinica
源URL[http://ir.iggcas.ac.cn/handle/132A11/106915]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Liu, Ping -Ping
作者单位1.Acad Sinica, Inst Earth Sci, Taipei, Taiwan
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
3.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing, Peoples R China
4.Natl Taiwan Univ, Dept Geosci, Taipei, Taiwan
推荐引用方式
GB/T 7714		 Liu, Ping -Ping,Chung, Sun-Lin,Ma, Ben,et al. Zircon Hf-O isotopic constraints on the origin and temporal evolution of the Toba volcanic system, Indonesia[J]. LITHOS,2022,434:7.
APA Liu, Ping -Ping.,Chung, Sun-Lin.,Ma, Ben.,Li, Xian-Hua.,Li, Qiu-Li.,...&Zhang, Xiao-Ran.(2022).Zircon Hf-O isotopic constraints on the origin and temporal evolution of the Toba volcanic system, Indonesia.LITHOS,434,7.
MLA Liu, Ping -Ping,et al."Zircon Hf-O isotopic constraints on the origin and temporal evolution of the Toba volcanic system, Indonesia".LITHOS 434(2022):7.

入库方式： OAI收割

来源：地质与地球物理研究所

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