The Identification of Seulimeum Fault System in Iejue Aceh Besar (Indonesia) Using 2-D Resistivity Imaging Method

Southeast Asian Conference on Geophysics

Taqiuddin, Z.M.^1 ; Nordiana, M.M.^1 ; Rosli, S.^1

Geophysic Section, School of Physics, Universiti Sains Malaysia, Penang

11800, Malaysia^1

关键词: 2-D resistivities;    Earth movements;    Geological map;    High resistivity;    Pole-dipole arrays;    Relative displacement;    Resistivity values;    Rock fractures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/62/1/012015/pdf
DOI  :  10.1088/1755-1315/62/1/012015

来源: IOP

【 摘 要 】

2-D resistivity imaging method is widely used to delineate fault zones. The fault referred as a rock fractures or discontinuity in rock volume due to relative displacement caused by the earth movement. In this study, 2-D resistivity imaging survey conducted in Iejue, Aceh Besar locality with the aim to delineate the Seulimeum fault system for this locality. Two survey lines L1 and L2, with a total length of 1200 m each, conducted across the suspected fault using ABEM SAS4000 system with Pole-dipole array and 10 m minimum electrodes spacing. 2-D resistivity imaging profile shows the exploration depth of >320 m with resistivity range of 1-1800 Ωm. The contrast in resistivity values for both lines L1 and L2 indicates the suspected fault at distance of 550-600 m and 500-550 m respectively. Correlation of 2-D resistivity imaging analyses with a geological map of the area shows that the fault is trending in the NW-SE direction with fault lineament approaching the resistivity result. Two distinct resistivity zones identified for each survey line; a saturated zone starting at distance of 600 m toward the end of the line and high resistivity zone at distance of 0 m to 550 m. This saturated zone interpreted as a ground fluid, while the high resistivity zone represents as existing alluvium, sandstones, and volcanic sediments.