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| Verfasst von: | Cisneros de León, Alejandro [VerfasserIn]  |
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| | Schindlbeck, Julie Christin [VerfasserIn] |
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| | Kutterolf, Steffen [VerfasserIn] |
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| | Danišík, Martin [VerfasserIn] |
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| | Schmitt, Axel Karl [VerfasserIn] |
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| | Freundt, Armin [VerfasserIn] |
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| | Pérez, Wendy [VerfasserIn] |
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| | Harvey, Janet C. [VerfasserIn] |
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| | Wang, Kuo-Lung [VerfasserIn] |
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| | Lee, Hao-Yang [VerfasserIn] |
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| Titel: | A history of violence |
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| Titelzusatz: | magma incubation, timing and tephra distribution of the Los Chocoyos supereruption (Atitlán Caldera, Guatemala) |
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| Verf.angabe: | Alejandro Cisneros de León, Julie C. Schindlbeck-Belo, Steffen Kutterolf, Martin Danišík, Axel K. Schmitt, Armin Freundt, Wendy Pérez, Janet C. Harvey, Kuo-Lung Wang, and Hao-Yang Lee |
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| E-Jahr: | 2021 |
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| Jahr: | 11 January 2021 |
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| Umfang: | 11 S. |
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| Fussnoten: | Gesehen am 30.06.2021 |
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| Titel Quelle: | Enthalten in: Journal of quaternary science |
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| Ort Quelle: | New York, NY [u.a.] : Wiley, 1986 |
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| Jahr Quelle: | 2021 |
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| Band/Heft Quelle: | 36(2021), 2 vom: 11. Jan., Seite 169-179 |
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| ISSN Quelle: | 1099-1417 |
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| Abstract: | The climactic Los Chocoyos (LCY) eruption from Atitlán caldera (Guatemala) is a key chronostratigraphic marker for the Quaternary period given the extensive distribution of its deposits that reached both the Pacific and Atlantic Oceans. Despite LCY tephra being an important marker horizon, a radioisotopic age for this eruption has remained elusive. Using zircon (U-Th)/He geochronology, we present the first radioisotopically determined eruption age for the LCY of 75 ± 2 ka. Additionally, the youngest zircon crystallization 238U-230Th rim ages in their respective samples constrain eruption age maxima for two other tephra units that erupted from Atitlán caldera, W-Fall (130 +16/−14 ka) and I-Fall eruptions (56 +8.2/−7.7 ka), which under- and overlie LCY tephra, respectively. Moreover, rim and interior zircon dating and glass chemistry suggest that before eruption silicic magma was stored for >80 kyr, with magma accumulation peaking within ca. 35 kyr before the LCY eruption during which the system may have developed into a vertically zoned magma chamber. Based on an updated distribution of LCY pyroclastic deposits, a new conservatively estimated volume of 1220 ± 150 km3 is obtained (volcanic explosivity index VEI > 8), which confirms the LCY eruption as the first-ever recognized supereruption in Central America. |
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| DOI: | doi:10.1002/jqs.3265 |
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| URL: | kostenfrei: Volltext: https://doi.org/10.1002/jqs.3265 |
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| | kostenfrei: Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/jqs.3265 |
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| | DOI: https://doi.org/10.1002/jqs.3265 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | (U-Th)/He |
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| | 238U-230Th disequilibrium |
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| | geochronology |
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| | tephrochronology |
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| | zircon |
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| K10plus-PPN: | 1761613049 |
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| Verknüpfungen: | → Zeitschrift |
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| Lokale URL UB: |  Zum Volltext |
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¬A¬ history of violence / Cisneros de León, Alejandro [VerfasserIn]; 11 January 2021 (Online-Ressource)
