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Prolonged near-solidus and steady-state magma storage for the Youngest Toba Tuff: Evidence from TitaniQ thermometry and diffusion chronometry

文献类型：期刊论文

作者Wang, Dian-Bing1; Liu, Ping-Ping1; Gao, Meng-Hao1; Zhang, Di2; Xu, Cheng1; Caricchi, Luca3
刊名EARTH AND PLANETARY SCIENCE LETTERS
出版日期2023-10-01
卷号619页码:10
ISSN号0012-821X
关键词diffusion timescale quartz magma storage Toba super-eruption
DOI10.1016/j.epsl.2023.118326
英文摘要Super-eruptions are among the most threatening natural hazards on Earth. The storage and thermal status of magmas within the crust are fundamental to understand the triggering mechanisms of explosive eruptions. This study presents cathodoluminescence (CL) images and Ti contents of quartz crystals from the -75 ka Youngest Toba Tuff (YTT), Indonesia. More than half of the quartz crystals did not display compositional zoning, whereas others contained simple zoning with bright rims (100 to 150 & mu;m in width) or fine oscillatory zoning. The crystallization temperatures of unzoned quartz crystals were mostly near or below the eruptive temperatures estimated by Fe-Ti oxides, and similar to those of CL-dark zones in zoned quartz crystals. This indicates that the majority of quartz crystals were crystallized at relatively low and constant temperatures during the repose period prior to the YTT eruption. In comparison, the CL-bright zones of zoned quartz crystals are commonly thin and crystallized within or slightly beyond the range of eruptive temperatures, indicating progressive thermal maturation of the crustal magma reservoir. Combined with greyscale intensity and Ti-in-quartz diffusion modeling, the residence time of quartz crystals within the crustal magma reservoir was estimated to vary from -100 to 400 kyrs, which is of similar orders of magnitude with those obtained by zircon U-Pb and allanite U-Th ages. Our results suggest that the large YTT crustal magma reservoir was generally stored at near-solidus temperatures in discrete and thermally heterogeneous magma batches for a prolonged period of hundreds of kyrs. We argue that sustained and stable magma influx, instead of pre-eruptive magma reheating, is essential to maintain the thermally steady-state YTT crustal magma reservoir and leads to rapid aggregation of different magma batches prior to the YTT super-eruption.& COPY; 2023 Elsevier B.V. All rights reserved.
WOS关键词TI DIFFUSION ; BISHOP TUFF ; QUARTZ ; ERUPTION ; HISTORY ; CATHODOLUMINESCENCE ; TIMESCALES ; SATURATION ; RECHARGE ; SYSTEMS
资助项目National Science Foundation of China[202203] ; Open Fund from SinoProbe Laboratory ; [41872058]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:001055866400001
资助机构National Science Foundation of China ; National Science Foundation of China ; Open Fund from SinoProbe Laboratory ; Open Fund from SinoProbe Laboratory ; National Science Foundation of China ; National Science Foundation of China ; Open Fund from SinoProbe Laboratory ; Open Fund from SinoProbe Laboratory ; National Science Foundation of China ; National Science Foundation of China ; Open Fund from SinoProbe Laboratory ; Open Fund from SinoProbe Laboratory ; National Science Foundation of China ; National Science Foundation of China ; Open Fund from SinoProbe Laboratory ; Open Fund from SinoProbe Laboratory
源URL[http://ir.iggcas.ac.cn/handle/132A11/111401]  
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.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Univ Geneva, Dept Earth Sci, CH-1205 Geneva, Switzerland
推荐引用方式
GB/T 7714		 Wang, Dian-Bing,Liu, Ping-Ping,Gao, Meng-Hao,et al. Prolonged near-solidus and steady-state magma storage for the Youngest Toba Tuff: Evidence from TitaniQ thermometry and diffusion chronometry[J]. EARTH AND PLANETARY SCIENCE LETTERS,2023,619:10.
APA Wang, Dian-Bing,Liu, Ping-Ping,Gao, Meng-Hao,Zhang, Di,Xu, Cheng,&Caricchi, Luca.(2023).Prolonged near-solidus and steady-state magma storage for the Youngest Toba Tuff: Evidence from TitaniQ thermometry and diffusion chronometry.EARTH AND PLANETARY SCIENCE LETTERS,619,10.
MLA Wang, Dian-Bing,et al."Prolonged near-solidus and steady-state magma storage for the Youngest Toba Tuff: Evidence from TitaniQ thermometry and diffusion chronometry".EARTH AND PLANETARY SCIENCE LETTERS 619(2023):10.

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来源：地质与地球物理研究所

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