Identification of Contact Zone using 2D Imaging Resistivity with EHR technique Postgradute Student M.M. Nordiana Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia e-mail:
[email protected] Senior Lecturer (Dr.) Rosli Saad Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia e-mail:
[email protected] Postgraduate Student Nur Azwin Ismail Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia e-mail:
[email protected] Postgraduate Student Nisa’ Ali Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia e-mail:
[email protected] ABSTRACT This paper illustrates findings of subsurface investigation and 2D imaging resistivity with Enhancing Horizontal Resolution (EHR) technique on a selected site at Batang Merbau, Tanah Merah, Kelantan (Malaysia). The purpose of this study is to characterize interbedded sedimentary with regards to the rock type. Four survey lines were employed at the study area. Results are presented in inversion model resistivity form. The results of the study showed that the study area has a maximum of three main zones, alluvium with resistivity value of 10-800 Ωm, sandstone with resistivity value of 1000-3000 Ωm and granitic bedrock with resistivity value of >3000 Ωm. There is a contact zone between granite and sandstone which produces fractures. Application of 2D imaging resistivity with Enhancing Horizontal Resolution (EHR) technique was successfully used in subsurface investigation. KEYWORDS: Subsurface, 2D imaging resistivity, Enhancing Horizontal Resolution (EHR) technique, contact zone, fracture INTRODUCTION In nature, rocks may be brought into contact through deposition, intrusion, faulting and shearing. The fundamental contacts, unconformities, intrusive contacts that form are normal depositional contacts, unconformities, intrusive contacts, faults and ductile shear zones.