3D seismic geomorphology analysis and evolution of fluvial systems in the Northeast Malay Basin

Noorzamzarina Sulaiman, Umar Hamzah, Abdul Rahim Samsudin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The Pleistocene-Recent fluvial geomorphology of the Northeast (NE) Malay Basin was investigated using high-resolution seismic profiles. This finding is based on the analysis of high- resolution by 3-D seismic data which provide exceptional imaging of the geometry, dimension, temporal and spatial distribution of fluvial channels. The Malay Basin comprises of a thick (>8 km), rift to post-rift Oligocene-Miocene to Pliocene basin-fill clastic sediment. The youngest (Miocene to Pliocene), post-rift succession is dominated by a thick (1-5 km), cyclic succession of coastal plain and coastal deposits, which were accumulated in a humid-tropical climatic setting. In general, the succession was divided into four seismic units (Unit1-4), bounded by base of incised valley surfaces. Unit 3 has been further divided into two sub-units which are sub-unit 3.1(older) and sub-unit 3.2 (younger). Two types of boundaries have been identified: 1) a boundary that is defined by a regionally-extensive erosion surface at the base of a prominent incised valley (Horizon D); 2) a sequence boundary that is defined by more weakly-incised, straight and low- sinuosity channels which is interpreted as low-stand alluvial bypass channel systems (Horizons A, B, C, and C1). Each unit displays a predictable vertical change of the channel pattern and scale, with wide low-sinuosity channels at the base passing gradationally upwards into narrow high-sinuosity channels at the top. The wide variation in channel style and size is interpreted to be controlled mainly by the sea-level fluctuations. However, climate control may have a significant impact on the channel style and size by affecting the discharge and the types of sediment load.

Original languageEnglish
Pages (from-to)13285-13307
Number of pages23
JournalElectronic Journal of Geotechnical Engineering
Volume20
Issue number27
Publication statusPublished - 2015

Fingerprint

Geomorphology
geomorphology
Sediments
Climate control
Sea level
basin
Spatial distribution
Erosion
Deposits
Imaging techniques
incised valley
Geometry
Pliocene
Miocene
fluvial geomorphology
basin fill
analysis
sequence boundary
clastic sediment
bypass

Keywords

  • 3-D seismic geomorphology
  • Fluvial systems
  • Incised valley
  • Sequence boundary

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

3D seismic geomorphology analysis and evolution of fluvial systems in the Northeast Malay Basin. / Sulaiman, Noorzamzarina; Hamzah, Umar; Samsudin, Abdul Rahim.

In: Electronic Journal of Geotechnical Engineering, Vol. 20, No. 27, 2015, p. 13285-13307.

Research output: Contribution to journalArticle

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