Geophysical characterisation of granitic soil and rock of pulau bayas, kenyir lake, terengganu

• Published in: Journal of Science and Technology in the Tropics
• Main Author: 2-s2.0-85066406548
• Format: Article
• Language: English
• Published: Universiti Putra Malaysia 2015
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85066406548&partnerID=40&md5=fab879afeba06840e4585d4a907b535f

This study, highlighted on the application of a 2-D electrical resistivity imaging as one of geophysical methods to obtain subsurface information such as depth to bedrock, boulders and subsurface structures, to evaluate the characteristics of granite weathering profile and to identify typical features of granite rock mass in various weathering grades. It involved a 2-D electrical resistivity method by using configuration of Wenner32 SX to profile the underground subsurface of granitic rock mass based on resistivity value. The study took place in Pulau Bayas, Tasik Kenyir Terengganu. Results of this study showed that the resistivity for three (3) sites with a total length of 600 m and 30 m depth is in the range of resistivity value of 118 ohm-m to 22595 ohm-m. Generally, each material including earth material has its own resistivity index, so as well as the granite rock. Results showed that Pulau Bayas is dominated by granite bodies in various weathering grades. In conclusion, it can be stated that the 2-D electrical resistivity is a reliable method in determining the subsurface structure and the method is very economical, easy and time effective. © 2015 Universiti Putra Malaysia. All rights reserved.