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Sedimentary Basins

Sedimentary Basins. Sedimentary basins – definition. Large areas of positive accommodation in which sediments can accumulate to considerable thickness and be preserved for long geological time periods. Basin classification – plate tectonics. Type of crust on which the basin rests

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Sedimentary Basins

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  1. Sedimentary Basins

  2. Sedimentary basins – definition Large areas of positive accommodation in which sediments can accumulate to considerable thickness and be preserved for long geological time periods.

  3. Basin classification – plate tectonics • Type of crust on which the basin rests • The position of the basin relative to plate margins • Where the basin lies close to a plate margin, the type of plate interaction occurring during sedimentation

  4. Types of plate margins: • Convergent (subduction) • Divergent (rifts, mid-oceanic ridges) • Transform (offset mid-oceanic ridges)

  5. Basin classification • Intraplate basins (pre-rift) • Divergent-margin basins (syn-rift) • Intraplate basins (post-rift) • Convergent-margin basins • Collision and post-collision basins • Strike-slip basins

  6. Economic potential of sedimentary basins • Basin physiography • Sediment supply • Depositional environments • Architecture of depositional systems • Subsidence rates • Burial depths and burial history • Geothermal gradients

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