Three-dimensional potential field modelling of a multi-vent maar-diatreme - The Lake Coragulac maar, Newer Volcanics Province, south-eastern Australia

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    Abstract

    High resolution gravity and magnetic data have been acquired across Lake Coragulac, a Quatemary maar volcano located in the Newer Volcanics Province of south-eastem Australia. A gravity low is observed across the maar crater, with several local gravity highs identified in the centre of the crater, often with corresponding magnetic anomalies. Geophysical data has been integrated with geologic observations and subjected to 2D forward and 3D inverse potential field modelling. Modelling has revealed a complex subsurface maar structure with four coalesced diatremes and several intrusive dykes identified. The modelled diatremes are shallow (maximum of 290 m deep) with the margins having a similar density to the host rock, while the diatreme centre is often denser, indicating that higher volumes of volcanic debris are present.
    Original languageEnglish
    Pages (from-to)70 - 83
    Number of pages14
    JournalJournal of Volcanology and Geothermal Research
    Volume235
    DOIs
    Publication statusPublished - 2012

    Cite this

    @article{39dbdfc32e484716afbc1d3fa9705b87,
    title = "Three-dimensional potential field modelling of a multi-vent maar-diatreme - The Lake Coragulac maar, Newer Volcanics Province, south-eastern Australia",
    abstract = "High resolution gravity and magnetic data have been acquired across Lake Coragulac, a Quatemary maar volcano located in the Newer Volcanics Province of south-eastem Australia. A gravity low is observed across the maar crater, with several local gravity highs identified in the centre of the crater, often with corresponding magnetic anomalies. Geophysical data has been integrated with geologic observations and subjected to 2D forward and 3D inverse potential field modelling. Modelling has revealed a complex subsurface maar structure with four coalesced diatremes and several intrusive dykes identified. The modelled diatremes are shallow (maximum of 290 m deep) with the margins having a similar density to the host rock, while the diatreme centre is often denser, indicating that higher volumes of volcanic debris are present.",
    author = "Blaikie, {Teagan Nicole} and Laurent Ailleres and Cas, {Raymond Alexander Fernand} and Betts, {Peter Graham}",
    year = "2012",
    doi = "10.1016/j.jvolgeores.2012.05.002",
    language = "English",
    volume = "235",
    pages = "70 -- 83",
    journal = "Journal of Volcanology and Geothermal Research",
    issn = "0377-0273",
    publisher = "Elsevier",

    }

    TY - JOUR

    T1 - Three-dimensional potential field modelling of a multi-vent maar-diatreme - The Lake Coragulac maar, Newer Volcanics Province, south-eastern Australia

    AU - Blaikie, Teagan Nicole

    AU - Ailleres, Laurent

    AU - Cas, Raymond Alexander Fernand

    AU - Betts, Peter Graham

    PY - 2012

    Y1 - 2012

    N2 - High resolution gravity and magnetic data have been acquired across Lake Coragulac, a Quatemary maar volcano located in the Newer Volcanics Province of south-eastem Australia. A gravity low is observed across the maar crater, with several local gravity highs identified in the centre of the crater, often with corresponding magnetic anomalies. Geophysical data has been integrated with geologic observations and subjected to 2D forward and 3D inverse potential field modelling. Modelling has revealed a complex subsurface maar structure with four coalesced diatremes and several intrusive dykes identified. The modelled diatremes are shallow (maximum of 290 m deep) with the margins having a similar density to the host rock, while the diatreme centre is often denser, indicating that higher volumes of volcanic debris are present.

    AB - High resolution gravity and magnetic data have been acquired across Lake Coragulac, a Quatemary maar volcano located in the Newer Volcanics Province of south-eastem Australia. A gravity low is observed across the maar crater, with several local gravity highs identified in the centre of the crater, often with corresponding magnetic anomalies. Geophysical data has been integrated with geologic observations and subjected to 2D forward and 3D inverse potential field modelling. Modelling has revealed a complex subsurface maar structure with four coalesced diatremes and several intrusive dykes identified. The modelled diatremes are shallow (maximum of 290 m deep) with the margins having a similar density to the host rock, while the diatreme centre is often denser, indicating that higher volumes of volcanic debris are present.

    UR - http://www.journals.elsevier.com/journal-of-volcanology-and-geothermal-research/

    U2 - 10.1016/j.jvolgeores.2012.05.002

    DO - 10.1016/j.jvolgeores.2012.05.002

    M3 - Article

    VL - 235

    SP - 70

    EP - 83

    JO - Journal of Volcanology and Geothermal Research

    JF - Journal of Volcanology and Geothermal Research

    SN - 0377-0273

    ER -