Sedimentary Basins.

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Presentation transcript:

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 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

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

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

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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