Distal ash fall from the mid-Holocene eruption of Mount Hudson (H2) discovered in the Falkland Islands: New possibilities for Southern Hemisphere archive synchronisation

Distal ash fall from the mid-Holocene eruption of Mount Hudson (H2) discovered in the Falkland Islands: New possibilities for Southern Hemisphere archive synchronisation
复制标题

在福克兰群岛发现的哈德逊山(H2)全新世中期喷发的远端火山灰:南半球档案同步的新可能性

DOI:
10.1016/j.quascirev.2021.107074
复制
发表时间:
2021
影响因子:
4
通讯作者:
Panaretos P
Panaretos P
中科院分区:
地球科学1区
文献类型:
--
作者:
Panaretos P

文献摘要

参考文献

被引文献

相似文献

隐孢子沉积物(微观火山灰)是重要的地质年代学工具,可用于同步过去环境变化的记录。在这里,我们报告了来自南大西洋福克兰群岛全新世泥炭序列(老人山)的远端隐毛藻。通过对单个火山玻璃碎片的地球化学分析(主量元素和微量元素),我们提供了这种隐石与智利巴塔哥尼亚哈德逊山全新世中期大规模爆发性喷发之间的强大相关性(H2;~3.9 ka cal BP)。 H2 作为隐毛虫在福克兰群岛的出现,显着增加了该标记地平线的已知分布范围,距离火山超过 1200 公里,是之前已知范围的三倍。基于陆地植物大型化石的高分辨率放射性碳年代学将 H2 火山灰的年代确定为 4265 ± 65 cal yr BP,这表明喷发发生的时间可能比之前报道的稍早一些。精确的年龄和新的地球化学参考数据集将有助于识别其他远端位置的 H2 火山灰。我们的泥炭序列中玻璃碎片的高浓度表明,H2 火山灰可能远远超出福克兰群岛,我们建议未来的研究寻找它在亚南极岛屿和南极半岛的存在,作为潜在有用的年代标记。
Cryptotephra deposits (microscopic volcanic ash) are important geochronological tools that can be used to synchronize records of past environmental change. Here we report a distal cryptotephra from a Holocene peat sequence (Canopus Hill) in the Falkland Islands, in the South Atlantic. Using geochemical analysis (major- and trace-element) of individual volcanic glass shards, we provide a robust correlation between this cryptotephra and the large mid-Holocene explosive eruption of Mt. Hudson in Patagonia, Chile (H2; ∼3.9 ka cal BP). The occurrence of H2 as a cryptotephra in the Falkland Islands significantly increases the known distribution of this marker horizon to more than 1200 km from the volcano, a threefold increase of its previous known extent. A high-resolution radiocarbon chronology, based on terrestrial plant macrofossils, dates the H2 tephra to 4265 ± 65 cal yr BP, suggesting that the eruption may have occurred slightly earlier than previously reported. The refined age and new geochemical reference dataset will facilitate the identification of the H2 tephra in other distal locations. The high concentration of glass shards in our peat sequence indicates that the H2 tephra may extend well beyond the Falkland Islands and we recommend future studies search for its presence across the sub-Antarctic islands and Antarctic Peninsula as a potentially useful chronological marker.
新西兰奥克兰地区中更新世硅质火山灰岩层:基于单个玻璃碎片微量元素分析的相关性和起源
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
N. Pearce;B. Alloway;J. Westgate
通讯作者: J. Westgate
卡莱塔奥利维亚(阿根廷圣克鲁斯省)北部沿海风成沉积物内的全新世火山灰层
DOI: 10.5027/andgeov48n2-3290
发表时间: 2021
期刊: Andean Geology
影响因子: 0.9
作者:
G. Zanchetta;M. Pappalardo;A. Roberto;M. Bini;I. Arienzo;I. Isola;A. Ribolini;G. Boretto;Enrique Fuck;D. Mele;M. D’Orazio;F. Marzaioli;I. Passariello
通讯作者: I. Passariello
Toms 和 Avhrr 对 1991 年 8 月哈德逊山喷发后的漂移火山云的观测
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
E. Constantine;G. Bluth;W. Rose
通讯作者: W. Rose
改造后的安第斯火山灰远端运输的证据:从南方火山带延伸隐火山灰框架
DOI: --
发表时间: 2019
影响因子: 2.7
作者:
A. Monteath;P. Hughes;S. Wastegård
通讯作者: S. Wastegård
全球火山活动计划
DOI: 10.5860/choice.45-6183
发表时间: 2010
影响因子: 2.8
作者:
Науки о Земле
通讯作者: Науки о Земле