Magnetic signature and morphology of the Acraman impact structure, South Australia

G. E. Williams, P. W. Schmidt, D. M. Boyd

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)


    Acraman is a major complex impact structure located in the Mesoproterozoic Gawler Range Volcanics of the Gawler Craton, S Australia, and has parts of its distal ejecta preserved in late Neoproterozoic (~590 Ma) strata of adjacent basins. Geomorphology and satellite images reveal a severely degraded structure comprising a near-circular central topographic depression 30 km across and arcuate features at 85-90 and ~150 km diameter. High-resolution digital aeromagnetic data for Acraman reveal a conspicuous circular magnetic low, 20 km in diameter. Several discontinuous magnetic lineaments that roughly parallel the boundary of the circular magnetic low occur at 85-90 km diameter. Acraman originally was a complex crater with central peak.

    Original languageEnglish
    Pages (from-to)431-442
    Number of pages12
    JournalAGSO Journal of Australian Geology and Geophysics
    Issue number4
    Publication statusPublished - 1996


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