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Cisneros de León, Alejandro [Author]; Schindlbeck, Julie Christin [Author]; Kutterolf, Steffen [Author]; Danišík, Martin [Author]; Schmitt, Axel Karl [Author]; Freundt, Armin [Author]; Pérez, Wendy [Author]; Harvey, Janet C. [Author]; Wang, Kuo-Lung [Author]; Lee, Hao-Yang [Author]

A history of violence

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  • Media type: E-Article
  • Title: A history of violence : magma incubation, timing and tephra distribution of the Los Chocoyos supereruption (Atitlán Caldera, Guatemala)
  • Contributor: Cisneros de León, Alejandro [Author]; Schindlbeck, Julie Christin [Author]; Kutterolf, Steffen [Author]; Danišík, Martin [Author]; Schmitt, Axel Karl [Author]; Freundt, Armin [Author]; Pérez, Wendy [Author]; Harvey, Janet C. [Author]; Wang, Kuo-Lung [Author]; Lee, Hao-Yang [Author]
  • Published: 11 January 2021
  • Published in: Journal of quaternary science ; 36(2021), 2 vom: 11. Jan., Seite 169-179
  • Language: English
  • DOI: 10.1002/jqs.3265
  • Identifier:
  • Keywords: (U-Th)/He ; 238U-230Th disequilibrium ; geochronology ; tephrochronology ; zircon
  • Origination:
  • Footnote:
  • Description: 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.
  • Access State: Open Access