Bulletin of Volcanology

, 75:692 | Cite as

Compositionally zoned crystals and real-time degassing data reveal changes in magma transfer dynamics during the 2006 summit eruptive episodes of Mt. Etna

  • Maren Kahl
  • Sumit Chakraborty
  • Fidel Costa
  • Massimo Pompilio
  • Marco Liuzzo
  • Marco Viccaro
Research Article

Abstract

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.

Keywords

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

Supplementary material

445_2013_692_MOESM1_ESM.pdf (126 kb)
ESM 1(PDF 126 kb)
445_2013_692_MOESM2_ESM.pdf (906 kb)
ESM 2(PDF 905 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Maren Kahl
    • 1
    • 2
  • Sumit Chakraborty
    • 1
  • Fidel Costa
    • 3
  • Massimo Pompilio
    • 4
  • Marco Liuzzo
    • 5
  • Marco Viccaro
    • 6
  1. 1.Institut für Geologie, Mineralogie & GeophysikRuhr-Universität BochumBochumGermany
  2. 2.School of Earth and EnvironmentThe University of LeedsLeedsUK
  3. 3.Earth Observatory of SingaporeNanyang Technological UniversitySingaporeSingapore
  4. 4.Istituto Nazionale di Geofisica e Vulcanologia—Sezione di PisaPisaItaly
  5. 5.Istituto Nazionale di Geofisica e Vulcanologia—Sezione di PalermoPalermoItaly
  6. 6.Dipartimento di Scienze Biologiche, Geologiche e Ambientali—Sezione di Scienze della TerraUniversità di CataniaCataniaItaly

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