THE EVOLUTION OF CHANNEL SYSTEM IN THE NORTHEAST MALAY BASIN, TERENGGANU OFFSHORE
DOI:
https://doi.org/10.11113/jt.v79.10912Keywords:
Evolution channel system, sea-level changes, channel morphologies, Pleistocene-Recent succession, northeast Malay BasinAbstract
This study aims to evaluate the evolution of the channel system in the Pleistocene-Recent succession in the northeast Malay Basin based on channel morphologies. The variable types of channel morphologies were determined from seven seismic time slices of study area. The fluvial channel became wider and low-sinuous when the sea-level rise. Meanwhile, the fluvial channel became narrower and high-sinuous when sea levels decreased. The point bars are seen in the meandering curve of the high-sinuosity channel. This occurred because of the sea-level decrease and more sediment being deposited in the study area. The point bars morphology do not appear in the transgressive event. An oxbow lake appeared in the 525 ms seismic time slice and is labelled as the oldest channel system. The channel morphologies then changed, and the oxbow lake does not appear in the younger system channel (Recent). The channel morphology changes have been proven to be affected by global sea-level changes.
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