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

    Research output: Contribution to journalArticleResearchpeer-review

    32 Citations (Scopus)

    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