Shale mobility: From salt-like shale flow to fluid mobilization in gravity-driven deformation, the late Albian–Turonian White Pointer Delta (Ceduna Subbasin, Great Bight, Australia)
نویسندگان
چکیده
Abstract Large offshore depocenters above a weak detachment level (either salt or shale) can undergo gravity spreading and/or gliding. The gravitational systems (e.g., gliding deltas) are classically composed of an updip domain affected by extensional listric normal faults and downdip toe thrusts. While the role in such is classic tectonic process, mechanical behavior mobile shale levels shale-prone gravity-driven increasingly questioned. A three-dimensional seismic data set Ceduna Subbasin (Australia) displays late Albian–Turonian White Pointer Delta (WPD) as having unusual diversity shale-cored structures. early flow resulted showing wedges, internal unconformities, diapirs ridges, while fluidization shales underneath significant burial mud volcanism, secondary radial fault sets, collapse features beneath Campanian–Maastrichtian Hammerhead Delta, which lies WPD. Massive mobilization, together with shortening distal margin uplift, localized major thrust core basin, ending downward-propagating failure Mobilization thick intervals, either salt-like appears to have been key process deformation, should be considered at large scale for worldwide deformation systems.
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ژورنال
عنوان ژورنال: Geology
سال: 2022
ISSN: ['0091-7613', '1943-2682']
DOI: https://doi.org/10.1130/g050611.1