Application of Geoelectrical Resisivity Method for Iron Sand Exploration in Ulakan Tapakis Padang Pariaman

There is no doubt about the presence of iron sand around the west coast of West
Sumatra. Several studies have been carried out, but in Ulakan Tapakis area is still under
observation, and no investigation of its potential and distribution. One of the methods that can
provide models and subsurface descriptions is using goelectrical resistivity method. The
geoelectrical application in Ulakan Tapakis was used Wenner-Schlumberger array into 4 section.
The section was designed perpendicular to the beach with a length of 47 meters for short lines
and 470 meters for long line, the distance between sections was about 65 meters. The results
obtained in the form of pseudosection types. Each section describes the distribution and lithology
of rocks below the surface. The combination of all sections gives an overview of the iron sand
model at Ulakan Tapakis. From the model obtained the results of geoelectrical measurements
with the Wenner-Schlumberger array, the distribution of iron sand can be found along the coast
of the study area at a depth of 0.7 m - 3 m in short line and 40 m in long line with resistivity
values ranging from 52 - 289 Ωm