A history of violence: magma incubation, timing and tephra distribution of the Los Chocoyos supereruption (Atitlán Caldera, Guatemala)
A history of violence: magma incubation, timing and tephra distribution of the Los Chocoyos supereruption (Atitlán Caldera, Guatemala)
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暴力史:Los Chocoyos 超级喷发的岩浆孕育、时间和火山灰分布(危地马拉阿蒂特兰火山口)
DOI:
10.1002/jqs.3265
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发表时间:
2021
影响因子:
2.3
通讯作者:
K. L.
中科院分区:
文献类型:
--
作者:
Cisneros de León;Schindlbeck‐Belo;Kutterolf;Danišík;Schmitt;Freundt;Pérez;Harvey;K. L.
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 crystallization238U–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/−14ka) and I‐Fall eruptions (56+8.2/−7.7ka), 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 withinca. 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 km3is obtained (volcanic explosivity index VEI > 8), which confirms the LCY eruption as the first‐ever recognized supereruption in Central America.
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影响因子:
3.7
作者:
J. Schindlbeck;S. Kutterolf;A. Freundt;S. Eisele;Kuo-Lung Wang;M. Frische
通讯作者:
J. Schindlbeck;S. Kutterolf;A. Freundt;S. Eisele;Kuo-Lung Wang;M. Frische
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
S. Kutterolf;A. Freundt;W. Pérez
通讯作者:
W. Pérez
影响因子:
6.3
作者:
H. Brenna;S. Kutterolf;M. Mills;K. Krüger
通讯作者:
K. Krüger
DOI:
10.1007/bf02597139
发表时间:
1966
期刊:
Bulletin Volcanologique
影响因子:
--
作者:
S. Aramaki;T. Ui
通讯作者:
T. Ui
DOI:
--
发表时间:
1973
期刊:
影响因子:
--
作者:
F. Bowles;R. N. Jack;I. Carmichael
通讯作者:
I. Carmichael