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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Marine-continental tephra correlations: Volcanic glass geochemistry from the Marsili Basin and the Aeolian Islands, Southern Tyrrhenian Sea, Italy
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Marine-continental tephra correlations: Volcanic glass geochemistry from the Marsili Basin and the Aeolian Islands, Southern Tyrrhenian Sea, Italy

机译：海洋-大陆特非拉相关性：意大利第勒尼安海南部马西里盆地和风神群岛的火山玻璃地球化学

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摘要

Major, minor and trace element analysis of volcanic glass in proximal and distal (<2 mm) tephra deposits underpins tephrochronology. This approach has been tested in the Aeolian Islands and the Tyrrhenian Sea using juvenile clasts in pyroclastic fall and flow deposits. Geochemical data are used to link marine tephras in the Marsili Basin (core TIR2000-C01) to explosive eruptions of (1) Lipari (Monte Pilato; 776cal AD); (2) Vulcano; and (3) Campi Flegrei (Soccavo 1; 11,915-12,721 cal years BP). Whether a polymictic coarse grained volcaniclastic turbidite in the Marsili Basin originated from collapse on Salina remains unresolved because multi-elemental analysis raises doubt about the published correlation to the Pollara region. It is evident that correlation of proximal continental and distal marine tephras, at a high level of confidence, requires a full complement of major, minor and trace element data. In conjunction with considerations of the mineralogy and morphology of juvenile deposits these data help define petrological lineages such that precise provenance can be established. Whilst a precise proximal-distal match must be based on identical major, minor and trace element concentrations it is clear that resurgent activity from a single volcano can produce magmas with identical compositions. In such cases stratigraphic relationships must complement any geochemical study. Occasionally proximal stratigraphies may be unrepresentative of the complete eruptive history because of a lack of exposure due to burial by more recent effusive and explosive activity, or sector collapse which can remove vital stratigraphy particularly on volcanic islands.
机译：主要，次要和近端和远端（<2 mm）特弗拉沉积物中火山玻璃的痕量元素分析支持了年代学。这种方法已经在风沙群岛和第勒尼安海中使用碎屑碎屑沉积和流动沉积物中的少年碎屑进行了测试。地球化学数据用于将马西里盆地的海洋特弗拉斯（TIR2000-C01岩心）与以下地区的爆发性喷发联系起来：（1）利帕里（Monte Pilato； 776cal AD）； （2）武尔卡诺岛； （3）Campi Flegrei（Soccavo 1；英国石油11,915-12,721 cal年）。由于多元素分析引起人们对已公布的与波拉拉地区相关性的怀疑，马西里盆地的多晶质粗粒火山碎屑浊度是否因盐沼崩塌而产生仍未得到解决。显然，在高度的置信度下，近端大陆和远端海生苔藓的相关性需要主要，次要和痕量元素数据的完整补充。结合对未成年人矿床的矿物学和形态的考虑，这些数据有助于定义岩石世系，从而可以建立精确的物源。尽管精确的近端-远端匹配必须基于相同的主要，次要和痕量元素浓度，但很明显，单个火山的复苏活动可以产生具有相同成分的岩浆。在这种情况下，地层关系必须补充任何地球化学研究。有时近端地层可能无法代表完整的火山爆发史，因为最近的爆发性和爆炸性活动导致的埋藏使岩层暴露不足，或者扇形塌陷可以消除重要的地层，尤其是在火山岛上。

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  • 来源
    《Journal of Volcanology and Geothermal Research》 |2012年第1期|p.74-94|共21页
  • 作者

    P.G. Albert; E.L. Tomlinson; V.C. Smith; A. Di Roberto; A. Todman; M. Rosi; M. Marani; W. Muller; M.A. Menzies;

  • 作者单位

    Department of Earth Sciences, Royal Holloway University of London, Egham, Surrey, TW20 OEX, UK;

    Department of Earth Sciences, Royal Holloway University of London, Egham, UK;

    Research Laboratory for Archaeology and the History of Art, University of Oxford, UK;

    Istituto Hazionale di Ceofisica e Vulcanologia, Sezione di Pisa, via Delia Faggiola 32, 56126 Pisa, Italy;

    Department of Earth Sciences, Royal Holloway University of London, Egham, UK;

    Dipartimento Scienza Delia Terra, University Pisa, Via S. Maria S3, 56126, Pisa, Italy;

    ISMAR, CNR, Via Gobetti 101-40129 Bologna Italy;

    Department of Earth Sciences, Royal Holloway University of London, Egham, UK;

    Department of Earth Sciences, Royal Holloway University of London, Egham, UK;

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  • 正文语种 eng
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  • 关键词

    marsili basin; glass chemistry; tephra; trace element; aeolian islands;

    机译：马西里盆地玻璃化学特非拉微量元素;风沙群岛;

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