Physical characteristics and distribution of bottom sediments from the kelantan river delta towards the south China sea continental Shelf, Malaysia

Nurul Afifah Mohd Radzir, Che Aziz Ali, Kamal Roslan Mohamed

Research output: Contribution to journalArticle

Abstract

The preponderance of sedimentological studies in the Kelantan River Delta onwards South China Sea shelf has led to a relatively good understanding on the sediments distribution and characteristics. The sediments of the area vary from very poorly sorted to very well sorted mixtures of sand, silt and clay and can be divided into three groups. Textural analysis of 65 surficial sediment samples showed that group 1 (silty) has a silt percentage of 65% to 85%, group 2 (silty sand) is dominated by sand ranging from 64% to 88% with the silt size varying between 12% to 23% and group 3 (sandy) is made up of 78% to 100% sand and 0% to 22% silt. Mineralogical analyses showed that the samples are dominated by polycrystalline sutured and straight boundary quartz as well as monocrystalline quartz. Small amounts of feldspar, mica and lithic fragments are present, while organic material is abundant. A semi-quantitative analysis of quartz grains surface texture and morphology was used to interpret the history of the grains. Six types of grains have been recognized; (a) irregular shape with various angles; (b) irregular surfaces with fractured plate and elongated fragments; (c) well rounded, with V marks, oriented etched pits on surface and protruding edges; (d) irregular breakage with rough texture on planar surface, adhering particles with uneven grooves and V marks with dimensions of <2μm; (e) irregular shape with rounded protruding edges, rough surface with oriented etched pits and V marks with dimensions of <2μm and adhering particles with trail of abrasion; and (f) very rough surface with irregular shape and protruding edges, abundant cracks and detachment of small particles and etching holes, V marks > 2μm dimension. In terms of distribution it can be divided into two sedimentological provinces according to the interrelationship between grain size, mineralogy, textural and morphology of sediment. Province A covers the shallower parts of the study area, which accumulated a large amount of silt and clay that possibly originated from the nearby land areas brought down by the Kelantan River and deposited as Recent sediments. Province B which covers most of the outer part of the shelf area, contains Recent and relict sediments with lesser amounts of inland sediment input. The relict sediments consist of oceanic sub-arkosic sand, which was deposited circa 5000 yr. BP during the mid Holocene relative sea-level low stand.

Original languageEnglish
Pages (from-to)89-97
Number of pages9
JournalBulletin of the Geological Society of Malaysia
Volume66
Publication statusPublished - 1 Dec 2018

Fingerprint

continental shelf
silt
river
sediment
sand
quartz
texture
lithic fragment
clay
surficial sediment
shelf sea
breakage
distribution
sea
mica
quantitative analysis
feldspar
mineralogy
grain size
Holocene

Keywords

  • Delta
  • Kelantan River
  • Peninsular Malaysia
  • Provenance
  • Sedimentology

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

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title = "Physical characteristics and distribution of bottom sediments from the kelantan river delta towards the south China sea continental Shelf, Malaysia",
abstract = "The preponderance of sedimentological studies in the Kelantan River Delta onwards South China Sea shelf has led to a relatively good understanding on the sediments distribution and characteristics. The sediments of the area vary from very poorly sorted to very well sorted mixtures of sand, silt and clay and can be divided into three groups. Textural analysis of 65 surficial sediment samples showed that group 1 (silty) has a silt percentage of 65{\%} to 85{\%}, group 2 (silty sand) is dominated by sand ranging from 64{\%} to 88{\%} with the silt size varying between 12{\%} to 23{\%} and group 3 (sandy) is made up of 78{\%} to 100{\%} sand and 0{\%} to 22{\%} silt. Mineralogical analyses showed that the samples are dominated by polycrystalline sutured and straight boundary quartz as well as monocrystalline quartz. Small amounts of feldspar, mica and lithic fragments are present, while organic material is abundant. A semi-quantitative analysis of quartz grains surface texture and morphology was used to interpret the history of the grains. Six types of grains have been recognized; (a) irregular shape with various angles; (b) irregular surfaces with fractured plate and elongated fragments; (c) well rounded, with V marks, oriented etched pits on surface and protruding edges; (d) irregular breakage with rough texture on planar surface, adhering particles with uneven grooves and V marks with dimensions of <2μm; (e) irregular shape with rounded protruding edges, rough surface with oriented etched pits and V marks with dimensions of <2μm and adhering particles with trail of abrasion; and (f) very rough surface with irregular shape and protruding edges, abundant cracks and detachment of small particles and etching holes, V marks > 2μm dimension. In terms of distribution it can be divided into two sedimentological provinces according to the interrelationship between grain size, mineralogy, textural and morphology of sediment. Province A covers the shallower parts of the study area, which accumulated a large amount of silt and clay that possibly originated from the nearby land areas brought down by the Kelantan River and deposited as Recent sediments. Province B which covers most of the outer part of the shelf area, contains Recent and relict sediments with lesser amounts of inland sediment input. The relict sediments consist of oceanic sub-arkosic sand, which was deposited circa 5000 yr. BP during the mid Holocene relative sea-level low stand.",
keywords = "Delta, Kelantan River, Peninsular Malaysia, Provenance, Sedimentology",
author = "Radzir, {Nurul Afifah Mohd} and Ali, {Che Aziz} and Mohamed, {Kamal Roslan}",
year = "2018",
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TY - JOUR

T1 - Physical characteristics and distribution of bottom sediments from the kelantan river delta towards the south China sea continental Shelf, Malaysia

AU - Radzir, Nurul Afifah Mohd

AU - Ali, Che Aziz

AU - Mohamed, Kamal Roslan

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The preponderance of sedimentological studies in the Kelantan River Delta onwards South China Sea shelf has led to a relatively good understanding on the sediments distribution and characteristics. The sediments of the area vary from very poorly sorted to very well sorted mixtures of sand, silt and clay and can be divided into three groups. Textural analysis of 65 surficial sediment samples showed that group 1 (silty) has a silt percentage of 65% to 85%, group 2 (silty sand) is dominated by sand ranging from 64% to 88% with the silt size varying between 12% to 23% and group 3 (sandy) is made up of 78% to 100% sand and 0% to 22% silt. Mineralogical analyses showed that the samples are dominated by polycrystalline sutured and straight boundary quartz as well as monocrystalline quartz. Small amounts of feldspar, mica and lithic fragments are present, while organic material is abundant. A semi-quantitative analysis of quartz grains surface texture and morphology was used to interpret the history of the grains. Six types of grains have been recognized; (a) irregular shape with various angles; (b) irregular surfaces with fractured plate and elongated fragments; (c) well rounded, with V marks, oriented etched pits on surface and protruding edges; (d) irregular breakage with rough texture on planar surface, adhering particles with uneven grooves and V marks with dimensions of <2μm; (e) irregular shape with rounded protruding edges, rough surface with oriented etched pits and V marks with dimensions of <2μm and adhering particles with trail of abrasion; and (f) very rough surface with irregular shape and protruding edges, abundant cracks and detachment of small particles and etching holes, V marks > 2μm dimension. In terms of distribution it can be divided into two sedimentological provinces according to the interrelationship between grain size, mineralogy, textural and morphology of sediment. Province A covers the shallower parts of the study area, which accumulated a large amount of silt and clay that possibly originated from the nearby land areas brought down by the Kelantan River and deposited as Recent sediments. Province B which covers most of the outer part of the shelf area, contains Recent and relict sediments with lesser amounts of inland sediment input. The relict sediments consist of oceanic sub-arkosic sand, which was deposited circa 5000 yr. BP during the mid Holocene relative sea-level low stand.

AB - The preponderance of sedimentological studies in the Kelantan River Delta onwards South China Sea shelf has led to a relatively good understanding on the sediments distribution and characteristics. The sediments of the area vary from very poorly sorted to very well sorted mixtures of sand, silt and clay and can be divided into three groups. Textural analysis of 65 surficial sediment samples showed that group 1 (silty) has a silt percentage of 65% to 85%, group 2 (silty sand) is dominated by sand ranging from 64% to 88% with the silt size varying between 12% to 23% and group 3 (sandy) is made up of 78% to 100% sand and 0% to 22% silt. Mineralogical analyses showed that the samples are dominated by polycrystalline sutured and straight boundary quartz as well as monocrystalline quartz. Small amounts of feldspar, mica and lithic fragments are present, while organic material is abundant. A semi-quantitative analysis of quartz grains surface texture and morphology was used to interpret the history of the grains. Six types of grains have been recognized; (a) irregular shape with various angles; (b) irregular surfaces with fractured plate and elongated fragments; (c) well rounded, with V marks, oriented etched pits on surface and protruding edges; (d) irregular breakage with rough texture on planar surface, adhering particles with uneven grooves and V marks with dimensions of <2μm; (e) irregular shape with rounded protruding edges, rough surface with oriented etched pits and V marks with dimensions of <2μm and adhering particles with trail of abrasion; and (f) very rough surface with irregular shape and protruding edges, abundant cracks and detachment of small particles and etching holes, V marks > 2μm dimension. In terms of distribution it can be divided into two sedimentological provinces according to the interrelationship between grain size, mineralogy, textural and morphology of sediment. Province A covers the shallower parts of the study area, which accumulated a large amount of silt and clay that possibly originated from the nearby land areas brought down by the Kelantan River and deposited as Recent sediments. Province B which covers most of the outer part of the shelf area, contains Recent and relict sediments with lesser amounts of inland sediment input. The relict sediments consist of oceanic sub-arkosic sand, which was deposited circa 5000 yr. BP during the mid Holocene relative sea-level low stand.

KW - Delta

KW - Kelantan River

KW - Peninsular Malaysia

KW - Provenance

KW - Sedimentology

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M3 - Article

VL - 66

SP - 89

EP - 97

JO - Bulletin of the Geological Society of Malaysia

JF - Bulletin of the Geological Society of Malaysia

SN - 0126-6187

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