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首页> 外文期刊>Bulletin of Volcanology >Compositionally zoned crystals and real-time degassing data reveal changes in magma transfer dynamics during the 2006 summit eruptive episodes of Mt. Etna
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Compositionally zoned crystals and real-time degassing data reveal changes in magma transfer dynamics during the 2006 summit eruptive episodes of Mt. Etna

机译：按区域划分的晶体和实时除气数据揭示了2006年山峰爆发时的岩浆传输动力学变化。埃特纳火山

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摘要

One of the major objectives of volcanology remains relating variations in surface monitoring signals to the magmatic processes at depth that cause these variations. We present a method that enables compositional and temporal information stored in zoning of minerals (olivine in this case) to be linked to observations of real-time degassing data. The integrated record may reveal details of the dynamics of gradual evolution of a plumbing system during eruption. We illustrate our approach using the 2006 summit eruptive episodes of Mt. Etna. We find that the history tracked by olivine crystals, and hence, most likely the magma pathways within the shallow plumbing system of Mt. Etna, differed considerably between the July and October eruptions. The compositional and temporal record preserved in the olivine zoning patterns reveal two mafic recharge events within months of each other (June and September 2006), and each of these magma supplies may have triggered the initiation of different eruptive cycles (July 14–24 and August 31–December 14). Correlation of these observations with gas monitoring data shows that the systematic rise of the CO2/SO2 gas values is associated with the gradual (pre- and syn-eruptive) supply of batches of gas-rich mafic magma into segments of Etna’s shallow plumbing system, where mixing with pre-existing and more evolved magma occurred.
机译：火山学的主要目标之一仍然是将表面监测信号的变化与造成这些变化的深部岩浆过程联系起来。我们提出了一种方法，该方法能够将存储在矿物分区（在这种情况下为橄榄石）中的成分和时间信息链接到实时脱气数据的观测值。综合记录可以揭示喷发期间管道系统逐渐演变的动力学细节。我们使用2006年山峰爆发事件说明我们的方法。埃特纳火山。我们发现，橄榄石晶体追踪了历史，因此很可能是山浅水暖系统中的岩浆通道。埃特纳火山（Etna）在7月和10月的喷发之间差异很大。橄榄石分区模式中保留的成分和时间记录揭示了彼此之间几个月内发生的两个镁铁质补给事件（2006年6月和2006年9月），并且这些岩浆供应中的每一个都可能触发了不同的喷发周期的开始（7月14-24日和8月）。 31日至12月14日）。这些观测值与气体监测数据的相关性表明，CO2 / SO2气体值的系统上升与将大量富含气体的铁镁质岩浆逐渐供应到埃特纳河浅水系统的各个段有关，与先前存在的岩浆和更多演化的岩浆混合发生。

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  • 来源
    《Bulletin of Volcanology》 |2013年第2期|1-14|共14页
  • 作者

    Maren Kahl; Sumit Chakraborty; Fidel Costa; Massimo Pompilio; Marco Liuzzo; Marco Viccaro;

  • 作者单位

    Institut für Geologie Mineralogie Geophysik Ruhr-Universität Bochum">(1);

    School of Earth and Environment The University of Leeds">(2);

    Institut für Geologie Mineralogie Geophysik Ruhr-Universität Bochum">(1);

    Earth Observatory of Singapore Nanyang Technological University">(3);

    Istituto Nazionale di Geofisica e Vulcanologia—Sezione di Pisa">(4);

    Istituto Nazionale di Geofisica e Vulcanologia—Sezione di Palermo">(5);

    Dipartimento di Scienze Biologiche Geologiche e Ambientali—Sezione di Scienze della Terra Università di Catania">(6);

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  • 正文语种 eng
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  • 关键词

    Crystal zoning; Plumbing system; Mt. Etna; Magma mixing; Gas monitoring; Timescales;

    机译：水晶分区;水暖系统;公吨。埃特纳火山岩浆混合;气体监测;时标;

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