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DOI	10.1016/j.epsl.2021.116965
	Zircon geochronology suggests a long-living and active magmatic system beneath the Ciomadul volcanic dome field (eastern-central Europe)
	Lukács R.; Caricchi L.; Schmitt A.K.; Bachmann O.; Karakas O.; Guillong M.; Molnár K.; Seghedi I.; Harangi S.
发表日期	2021
ISSN	0012821X
卷号	565
英文摘要	Ciomadul is the youngest volcano in eastern-central Europe. Although its last eruption occurred at ca. 30 ka, there are independent indications for a high-crystallinity magma reservoir persisting beneath the volcano until present. In order to further test the hypothesis of long-lived melt presence and to better constrain the nature and timescales associated with the subvolcanic magma storage system, over 500 zircon U-Th and U-Pb spot ages (crystal interiors and outer surfaces) were interpreted from dacitic rocks of the most productive eruptive period (the Young Ciomadul Eruptive Period; YCEP, 160-30 ka). Zircon surface ages from lava dome and pumice samples range from ca. 600 ka up to the youngest eruption event at 30 ka. They form a continuous age distribution and some single crystals reveal significant age zonation (>150 kyr difference from core to rim). The oldest zircon ages of YCEP overlap with the last eruption events of the Old Ciomadul Eruptive Period (1000–330 ka). The zircon age spectra, combined with textural data, point to a prolonged (several 100's kyr) residence in a highly crystalline mush state. The range in zircon crystallization temperature (from ∼750 °C to the solidus at ∼680 °C) is consistent with the results of thermometry on amphibole and plagioclase from felsic crystal clots, which represent crystal mush fragments. To maintain magma reservoir for such a long time above solidus, continuous magma input by deeper recharge is required. Zircon crystallization model calculations constrained by thermal modelling imply an average rate of magma input of about 1.3 × 10−4 km3/yr over 2 Myr. Such estimate allows us to calculate an extrusive/intrusive ratio of 1:25–1:30. The model calculations suggest that a crystal mush zone of about 35 km3 is still present within the subvolcanic magma reservoir. Importantly, the Ciomadul plumbing system thus remains thermally primed and renewed magma injection could lead to rapid reawakening and eruption of the apparently inactive volcano. © 2021 The Authors
关键词	crystal mush magma flux magma storage residence time thermal model zircon dating
英文关键词	Binary alloys; Crystallinity; Digital storage; Domes; Feldspar; Geochronology; Grain size and shape; Lead alloys; Residence time distribution; Single crystals; Thorium alloys; Uranium alloys; Volcanoes; Central Europe; Crystal mush; Magma flux; Magma reservoirs; Magma storage; Model calculations; Residence time; Thermal model; Zircon age; Zircon dating; Zircon; crystal; crystallization; dating method; dome; geochronology; magma chamber; modeling; residence time; volcanic eruption; zircon; Ciomadul Volcano; Harghita; Romania
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203201
作者单位	MTA-ELTE Volcanology Research Group, Pázmány P. sétány 1/C, Budapest, 1117, Hungary; Department of Earth Sciences, University of Geneva, Rue des Maraîchers 13, Geneva, 1205, Switzerland; Institute of Earth Sciences, Heidelberg University, Im Neuenheimer Feld 236, Heidelberg, 69120, Germany; Department of Earth Sciences, ETH Zürich, Clausiusstrasse 25, Zürich, 8092, Switzerland; Department of Petrology and Geochemistry, Eötvös Loránd University, Pázmány P. sétány 1/C, Budapest, 1117, Hungary; Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences, Bem tér 18/c, Debrecen, 4026, Hungary; Institute of Geodynamics, Romanian Academy, 19–21 Jean-Louis Calderon St., Bucharest-37, R-020032, Romania
推荐引用方式 GB/T 7714	Lukács R.,Caricchi L.,Schmitt A.K.,et al. Zircon geochronology suggests a long-living and active magmatic system beneath the Ciomadul volcanic dome field (eastern-central Europe)[J],2021,565.
APA	Lukács R..,Caricchi L..,Schmitt A.K..,Bachmann O..,Karakas O..,...&Harangi S..(2021).Zircon geochronology suggests a long-living and active magmatic system beneath the Ciomadul volcanic dome field (eastern-central Europe).Earth and Planetary Science Letters,565.
MLA	Lukács R.,et al."Zircon geochronology suggests a long-living and active magmatic system beneath the Ciomadul volcanic dome field (eastern-central Europe)".Earth and Planetary Science Letters 565(2021).