High resolution 3D confocal microscope imaging of volcanic ash particles

David Wertheim, Gavin Gillmore, Ian Gill, Nick Petford

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    We present initial results from a novel high resolution confocal microscopy study of the 3D surface structure of volcanic ash particles from two recent explosive basaltic eruptions, Eyjafjallajökull (2010) and Grimsvötn (2011), in Iceland. The majority of particles imaged are less than 100 μm in size and include PM10s, known to be harmful to humans if inhaled. Previous studies have mainly used 2D microscopy to examine volcanic particles. The aim of this study was to test the potential of 3D laser scanning confocal microscopy as a reliable analysis tool for these materials and if so to what degree high resolution surface and volume data could be obtained that would further aid in their classification. First results obtained using an Olympus LEXT scanning confocal microscope with a × 50 and × 100 objective lens are highly encouraging. They reveal a range of discrete particle types characterised by sharp or concave edges consistent with explosive formation and sudden rupture of magma. Initial surface area/volume ratios are given that may prove useful in subsequent modelling of damage to aircraft engines and human tissue where inhalation has occurred.
    Original languageEnglish
    JournalScience of The Total Environment
    Volume590-591
    Early online date9 Mar 2017
    DOIs
    Publication statusPublished - 15 Jul 2017

    Fingerprint

    volcanic ash
    microscopy
    explosive
    rupture
    aid
    engine
    aircraft
    volcanic eruption
    surface area
    laser
    magma
    damage
    particle
    modeling

    Keywords

    • Volcanic ash particles
    • microscopy
    • confocal

    Cite this

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    title = "High resolution 3D confocal microscope imaging of volcanic ash particles",
    abstract = "We present initial results from a novel high resolution confocal microscopy study of the 3D surface structure of volcanic ash particles from two recent explosive basaltic eruptions, Eyjafjallaj{\"o}kull (2010) and Grimsv{\"o}tn (2011), in Iceland. The majority of particles imaged are less than 100 μm in size and include PM10s, known to be harmful to humans if inhaled. Previous studies have mainly used 2D microscopy to examine volcanic particles. The aim of this study was to test the potential of 3D laser scanning confocal microscopy as a reliable analysis tool for these materials and if so to what degree high resolution surface and volume data could be obtained that would further aid in their classification. First results obtained using an Olympus LEXT scanning confocal microscope with a × 50 and × 100 objective lens are highly encouraging. They reveal a range of discrete particle types characterised by sharp or concave edges consistent with explosive formation and sudden rupture of magma. Initial surface area/volume ratios are given that may prove useful in subsequent modelling of damage to aircraft engines and human tissue where inhalation has occurred.",
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    language = "English",
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    High resolution 3D confocal microscope imaging of volcanic ash particles. / Wertheim, David; Gillmore, Gavin; Gill, Ian; Petford, Nick.

    In: Science of The Total Environment, Vol. 590-591, 15.07.2017.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - High resolution 3D confocal microscope imaging of volcanic ash particles

    AU - Wertheim, David

    AU - Gillmore, Gavin

    AU - Gill, Ian

    AU - Petford, Nick

    PY - 2017/7/15

    Y1 - 2017/7/15

    N2 - We present initial results from a novel high resolution confocal microscopy study of the 3D surface structure of volcanic ash particles from two recent explosive basaltic eruptions, Eyjafjallajökull (2010) and Grimsvötn (2011), in Iceland. The majority of particles imaged are less than 100 μm in size and include PM10s, known to be harmful to humans if inhaled. Previous studies have mainly used 2D microscopy to examine volcanic particles. The aim of this study was to test the potential of 3D laser scanning confocal microscopy as a reliable analysis tool for these materials and if so to what degree high resolution surface and volume data could be obtained that would further aid in their classification. First results obtained using an Olympus LEXT scanning confocal microscope with a × 50 and × 100 objective lens are highly encouraging. They reveal a range of discrete particle types characterised by sharp or concave edges consistent with explosive formation and sudden rupture of magma. Initial surface area/volume ratios are given that may prove useful in subsequent modelling of damage to aircraft engines and human tissue where inhalation has occurred.

    AB - We present initial results from a novel high resolution confocal microscopy study of the 3D surface structure of volcanic ash particles from two recent explosive basaltic eruptions, Eyjafjallajökull (2010) and Grimsvötn (2011), in Iceland. The majority of particles imaged are less than 100 μm in size and include PM10s, known to be harmful to humans if inhaled. Previous studies have mainly used 2D microscopy to examine volcanic particles. The aim of this study was to test the potential of 3D laser scanning confocal microscopy as a reliable analysis tool for these materials and if so to what degree high resolution surface and volume data could be obtained that would further aid in their classification. First results obtained using an Olympus LEXT scanning confocal microscope with a × 50 and × 100 objective lens are highly encouraging. They reveal a range of discrete particle types characterised by sharp or concave edges consistent with explosive formation and sudden rupture of magma. Initial surface area/volume ratios are given that may prove useful in subsequent modelling of damage to aircraft engines and human tissue where inhalation has occurred.

    KW - Volcanic ash particles

    KW - microscopy

    KW - confocal

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    DO - 10.1016/j.scitotenv.2017.02.230

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    JO - Science of The Total Environment

    JF - Science of The Total Environment

    SN - 0048-9697

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