Characterization of Bukit Bunuh Ground Subsurface by 2D Resistivity for Meteorite Impact Study

 

Y.C. Kiu

Graduate student, Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia. e-mail: kyapc@hotmail.com

Dr. Rosli Saad

Senior Lecturer, Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia. e-mail: rosli@usm.my

Dr. Mokhtar Saidin

Professor, Centre for Global Archeological Research Malaysia, 11800 Universiti Sains Malaysia, Penang, Malaysia. e-mail: mmokh@usm.my

M.M. Nordiana

Gradute Student, Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia. e-mail: mmnordiana@gmail.com

Andy Anderson Bery

Gradute Student, Y.C. Kiu Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia. e-mail: kyapc@hotmail.com Senior Lec

 

 ABSTRACT

2D resistivity method is to measure the apparent resistivity of ground subsurface. The study was conducted at Bukit Bunuh, Lenggong, Perak (Malaysia)and consists of four survey lines; North-South (8 km), West-East (8 km), Northwest-Southeast (6.61 km) and Southwest-Northeast (1.84 km) using Pole-dipole array with 5 m minimum electrode spacing. The study is to map bedrock, structure and fracture of ground subsurface for possible meteorite impact. The results show the first zone, overburden (alluvium and boulders) thickness 5-60 m with resistivity value of 10-800 ohm-m and >6000 ohm-m respectively. The second zone with resistivity value >20 000 ohm-m was granitic bedrock. A lot of fractures and faults were identified within the granitic bedrock and other potential areas of poor rock quality. The highly fractured bedrock was identifying at longitude 100.965-100.978 and latitude 5.056-5.056 and could be one of the possible causes of meteorite impact.

Keywords: 2D Resistivity, subsurface, Bukit Bunuh, meteorite impact, fracture

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