Glass shard K-Ar dating of the Chalupas caldera major eruption: Main Pleistocene stratigraphic marker of the Ecuadorian volcanic arc
Chalupas caldera大喷发的玻璃碎片K-Ar定年:厄瓜多尔火山弧的主要更新世地层标志
作者: Mathilde BablonXavier QuidelleurGiuseppe SianiPablo SamaniegoJean-Luc Le PennecJulius NouetCéline LiorzouSantiago SantamaríaSilvana Hidalgo
作者单位: 1Université Paris-Saclay, CNRS, GEOPS, Orsay, 91405, France
2Université Côte d'Azur, CNRS, IRD, Observatoire de la Côte d'Azur, Géoazur, Sophia Antipolis, 06560, Valbonne, France
3Laboratoire Magmas et Volcans, Université Clermont Auvergne, CNRS, IRD, OPGC, F-63000, Clermont-Ferrand, France
4Instituto Geofísico, Escuela Politécnica Nacional, Ladrón de Guevara E11-253, Ap. 2759, Quito, Ecuador
5Université de Bretagne Occidentale, Laboratoire Géosciences Océan, IUEM, 29280, Plouzané, France
刊名: Quaternary Geochronology, 2020, Vol.57
来源数据库: Elsevier Journal
DOI: 10.1016/j.quageo.2020.101053
关键词: K-Ar datingGlass shardsEcuadorChalupasIgnimbrite eruption
英文摘要: Abstract(#br)New K-Ar ages obtained on juvenile pumice glass shards indicate that the Chalupas ignimbrite, one of the main Pleistocene tephra markers of the Ecuadorian arc, was emplaced at 216 ± 5 ka. Morphology and major and trace element contents of the glass shards are similar to those of ash layers from deep-sea cores and allow correlation between continental deposits and marine tephra layers. Based on biostratigraphy and δ 18 O data, the age models of these cores support our K-Ar age. Fine ashes from the Chalupas eruption column have been found about 1000 km away from the source caldera, and the estimated deposit volume of both ignimbrite and co-ignimbrite deposits ranges from 200 to 265 km 3 . This suggests that the Chalupas event could have been strong enough to reach the...
全文获取路径: Elsevier  (合作)
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影响因子:4.015 (2012)

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关键词翻译
关键词翻译
  • dating 年代测定
  • volcanic 火山的
  • Pleistocene 更新世
  • caldera 破火山口
  • eruption 喷发
  • stratigraphic 地层学的
  • shard 曲面玻屑
  • major 知的
  • marker 标试器