An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia

An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia

An integrated geophysical study was conducted to investigate the subsurface regional structure and the presence of a Quaternary sedimentary basin in the Olak Lempit - Banting area of Selangor, Malaysia. A regional gravity survey and the high resolution reflection seismic were employed to determine t...

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Main Authors: Abdul Rahim Samsudin, Umar Hamzah, Zuraidah Ramli
Format: Article
Language:English
Published: Universiti Kebangsaan Malaysia 2007
Online Access:http://journalarticle.ukm.my/110/
http://journalarticle.ukm.my/110/
http://journalarticle.ukm.my/110/1/1.pdf
id ukm-110
recordtype eprints
spelling ukm-1102016-12-14T06:26:26Z http://journalarticle.ukm.my/110/ An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia Abdul Rahim Samsudin, Umar Hamzah, Zuraidah Ramli, An integrated geophysical study was conducted to investigate the subsurface regional structure and the presence of a Quaternary sedimentary basin in the Olak Lempit - Banting area of Selangor, Malaysia. A regional gravity survey and the high resolution reflection seismic were employed to determine the thickness and areal distribution of the alluvial sedimentary basin as well as to investigate the depth and topography of the bedrock in the study area. The sedimentary basin hosts one of the most important coastal alluvial aquifer which was used to cater the shortage of domestic water supply during the worst water crisis that hit the state of Selangor in 1998. The surface geological map shows that in general 70% of the study area is covered by Quaternary deposits of Beruas, Gula and Simpang Formations which overlie the sedimentary bedrock of Kenny Hill Formation. The Beruas Formation consists of mainly clay, sandy clay and peat of Holocene fluviatile-estuarine deposits, whereas the Gula Formation represents Holocene marine to estuarine sediments which mostly consists of clay and minor sand. The Simpang Formation (Pleistocene) is a continental deposit comprising of gravel, sand, clay and silt. The underlying Kenny Hill Formation consists of a monotonous sequence of interbedded shales, mudstones and sandstones. The rock is Carbonaceous in age and it forms an undulating surface topography in the eastern part of the study area. A total of 121 gravity stations were established using a La Coste & Romberg gravity meter and the elevations of most of the stations were determined barometrically using Tiernan-Wallace altimeters. The high resolution seismic reflection using the common mid point (CMP) or roll along technique was carried out using a 24 channel signal enhancement seismograph and high frequency geophones. A total length of about 1.7 km stacked seismic section has been acquired in this survey and a nearby borehole data was used for interpretation. A relative Bouguer anomaly map shows an elongated zone of low gravity anomaly trending approximately NW-SE which is interpreted to be the deposition center of the Quaternary basin. The interpreted gravity profiles running across the central area of the study area show that the basin has thickness varies from tenth to several hundred meters with maximum depth to bedrock of about 275 m. A gravity profile which passes through the eastern edge of the basin was modeled with depth to bedrock of about 178 m below ground which agrees very well with those obtained from the interpreted seicmic section and borehole data. The stacked seismic section shows several high amplitude parallel to sub-parallel reflection overlying discontinuos and low reflection pattern. Reflections on the eastern part of the section is much shallower than the one observed on the western part which clearly indicates the presence of basinal structure with a total interpreted depth to bedrock of about 200 meters. Universiti Kebangsaan Malaysia 2007-12 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/110/1/1.pdf Abdul Rahim Samsudin, and Umar Hamzah, and Zuraidah Ramli, (2007) An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia. Sains Malaysiana, 36 (2). pp. 159-163. ISSN 0126-6039 http://pkukmweb.ukm.my/~jsm/kandungan.html
repository_type Digital Repository
institution_category Local University
institution Universiti Kebangasaan Malaysia
building UKM Institutional Repository
collection Online Access
language English
description An integrated geophysical study was conducted to investigate the subsurface regional structure and the presence of a Quaternary sedimentary basin in the Olak Lempit - Banting area of Selangor, Malaysia. A regional gravity survey and the high resolution reflection seismic were employed to determine the thickness and areal distribution of the alluvial sedimentary basin as well as to investigate the depth and topography of the bedrock in the study area. The sedimentary basin hosts one of the most important coastal alluvial aquifer which was used to cater the shortage of domestic water supply during the worst water crisis that hit the state of Selangor in 1998. The surface geological map shows that in general 70% of the study area is covered by Quaternary deposits of Beruas, Gula and Simpang Formations which overlie the sedimentary bedrock of Kenny Hill Formation. The Beruas Formation consists of mainly clay, sandy clay and peat of Holocene fluviatile-estuarine deposits, whereas the Gula Formation represents Holocene marine to estuarine sediments which mostly consists of clay and minor sand. The Simpang Formation (Pleistocene) is a continental deposit comprising of gravel, sand, clay and silt. The underlying Kenny Hill Formation consists of a monotonous sequence of interbedded shales, mudstones and sandstones. The rock is Carbonaceous in age and it forms an undulating surface topography in the eastern part of the study area. A total of 121 gravity stations were established using a La Coste & Romberg gravity meter and the elevations of most of the stations were determined barometrically using Tiernan-Wallace altimeters. The high resolution seismic reflection using the common mid point (CMP) or roll along technique was carried out using a 24 channel signal enhancement seismograph and high frequency geophones. A total length of about 1.7 km stacked seismic section has been acquired in this survey and a nearby borehole data was used for interpretation. A relative Bouguer anomaly map shows an elongated zone of low gravity anomaly trending approximately NW-SE which is interpreted to be the deposition center of the Quaternary basin. The interpreted gravity profiles running across the central area of the study area show that the basin has thickness varies from tenth to several hundred meters with maximum depth to bedrock of about 275 m. A gravity profile which passes through the eastern edge of the basin was modeled with depth to bedrock of about 178 m below ground which agrees very well with those obtained from the interpreted seicmic section and borehole data. The stacked seismic section shows several high amplitude parallel to sub-parallel reflection overlying discontinuos and low reflection pattern. Reflections on the eastern part of the section is much shallower than the one observed on the western part which clearly indicates the presence of basinal structure with a total interpreted depth to bedrock of about 200 meters.
format Article
author Abdul Rahim Samsudin,
Umar Hamzah,
Zuraidah Ramli,
spellingShingle Abdul Rahim Samsudin,
Umar Hamzah,
Zuraidah Ramli,
An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia
author_facet Abdul Rahim Samsudin,
Umar Hamzah,
Zuraidah Ramli,
author_sort Abdul Rahim Samsudin,
title An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia
title_short An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia
title_full An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia
title_fullStr An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia
title_full_unstemmed An integrated geophysical study of the quaternary basin at Olak Lempit-Banting Area, Selangor, Malaysia = Kajian geofizik bersepadu lembangan kuaterneri di kawasan Olak Lempit-Banting, Selangor, Malaysia
title_sort integrated geophysical study of the quaternary basin at olak lempit-banting area, selangor, malaysia = kajian geofizik bersepadu lembangan kuaterneri di kawasan olak lempit-banting, selangor, malaysia
publisher Universiti Kebangsaan Malaysia
publishDate 2007
url http://journalarticle.ukm.my/110/
http://journalarticle.ukm.my/110/
http://journalarticle.ukm.my/110/1/1.pdf
first_indexed 2023-09-18T19:01:12Z
last_indexed 2023-09-18T19:01:12Z
_version_ 1777403085505691648

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