Turbidite Sediment Core Examined using MicroCT

  • TURBIDITE SEDIMENT CORE examined using computed tomography CT

    Lacustrine turbidites are a reliable record of seismic activity. When a turbidity
    current moves downslope a typical sedimentary sequence is created afterwards,
    including a fine to coarse grained sand fraction at the bottom (if the current has
    enough energy) towards a layer of fine grains of silt or clay towards the top. The
    characterisation of those turbidites on different locations is essential to reconstruct
    the complete impact of past earthquakes.

    When sedimentary structures are present in cores, it is possible to reconstruct the
    orientation and flow direction with CT. However, if such sedimentary structures are
    not present, grain fabric and size analysis can reveal important information. The
    resolution of medical CT is not sufficient to analyse grain sizes, thus there is a high
    demand for sediment core analysis to evaluate grain size in a non-destructive way using a system like the TESCAN CoreTOM.

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