Results of geoelectrical soundings for mapping of a marine clay along the Tangkak-Pagoh highway Johor, Malaysia

Abdul Ghani Rafek, Abdul Rahim Samsudin

Research output: Contribution to journalArticle

Abstract

Geoelectrical resistivity soundings conducted along the north-south expressway in the Tangkak-Pagoh area during its construction enabled the mapping of a marine clay which was present in alluvium. The apparent resistivity curves of the marine clay area, were characterised by low apparent resistivity values falling to almost zero, and a characteristic shape which was different from areas of weathered metasediments and weathered granite adjacent to this area. Apparent resistivities for both metasediments and granite were intermediate to high, with a distinct upward convex curve for metasediments and a flat upward convex curve for granite. Quantitative interpretation was able to distinguish between an upper and a lower clay horizon, which have differentconsistency and fine sand content. The thickness of the upper clay horizon, which varies between 8.0 m to 9.0 m according to borehole data showed good agreement with that obtained by resistivity soundings. The base of the lower clay horizon remained undetected by the resistivity soundings because of its very low specific resistivity. Using the thickness of weathered layers as observed along the road cuttings as a guide, good agreement between field data and calculated values was obtained in determining the specific resistivities and individual layer thicknesses for the granite and metasediment weathering profiles.

Original languageEnglish
Pages (from-to)117-120
Number of pages4
JournalExploration Geophysics
Volume20
Issue number2
DOIs
Publication statusPublished - 1989

Fingerprint

Malaysia
sounding
clays
electrical resistivity
road
clay
granite
metasediment
horizon
curves
alluvium
weathering profile
weathering
motorway
boreholes
roads
falling
alluvial deposit
sands
borehole

Keywords

  • Depth and thickness determination
  • Geoelectrical resistivity soundings
  • Marine clay

ASJC Scopus subject areas

  • Geophysics
  • Geology

Cite this

Results of geoelectrical soundings for mapping of a marine clay along the Tangkak-Pagoh highway Johor, Malaysia. / Rafek, Abdul Ghani; Samsudin, Abdul Rahim.

In: Exploration Geophysics, Vol. 20, No. 2, 1989, p. 117-120.

Research output: Contribution to journalArticle

Rafek, Abdul Ghani ; Samsudin, Abdul Rahim. / Results of geoelectrical soundings for mapping of a marine clay along the Tangkak-Pagoh highway Johor, Malaysia. In: Exploration Geophysics. 1989 ; Vol. 20, No. 2. pp. 117-120.
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