Carbonate platforms in wedge-top basins: An example from the Gunung Mulu National Park,Northern Sarawak (Malaysia) |
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Authors: | Mario Wannier |
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Institution: | 1507 Ashford Parkway, Houston, TX 77077, USA |
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Abstract: | The Melinau carbonate platform initiated during the Mid-Eocene on a rotating slice of the Rajang accretionary prism. The differential sedimentary loading enhanced a rotation of the mobile substratum and created an elongated, asymmetrical wedge-top basin. The extensional southern margin of the basin consists of a 2100–2200-m-thick section of Eocene-to-Oligocene carbonates. These thin laterally towards the northern margin of the basin, where a carbonate factory was active on a postulated underlying thrust. Backstepping and dismemberment of the carbonate system started during the latest Oligocene and deep-marine sedimentation became prevalent over the entire region during the Early Miocene. |
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Keywords: | Wedge-top basin Carbonate platform drowning Mobile substratum Mulu Melinau Sarawak |
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