DISTRIBUTION OF IRON SAND BASED ON SUSCEPTIBILITY VALUES IN ULAKAN TAPAKIS, PADANG PARIAMAN, WEST SUMATRA

Abstract

This study investigates the distribution of iron sand deposits in the Ulakan Tapakis coastal area, Padang Pariaman, West Sumatra, based on magnetic susceptibility values. The region is known for its abundant but underutilized iron sand resources. Previous studies have not sufficiently examined the correlation between magnetic susceptibility and mineralogical composition, which is crucial for optimizing extraction. This research addresses that gap by integrating field sampling, laboratory analysis, and microscopy examination. Twenty borehole samples were collected using a hand auger method arranged in four parallel and five perpendicular transects along the coastline. The magnetic mineral content was determined by magnetic separation, and magnetic susceptibility was measured using the Bartington MS2B sensor at both low and high field settings. Results revealed significant spatial variability, with the highest magnetic mineral content (28.63%) and susceptibility values (5574.8 × 10⁻⁸ m³/kg) observed at point 1D. Microscopy analysis of this sample confirmed the presence of iron (Fe) and zirconium (Zr) minerals, with Fe comprising 79.98% of the material. These findings indicate a heterogeneous distribution of magnetic minerals influenced by lithological and depositional conditions. The integration of susceptibility measurements and mineralogical data provides a practical framework for identifying high-potential extraction zones. The outcomes support the development of targeted mineral exploration strategies and sustainable resource management practices in similar coastal environments. Future research should aim to incorporate advanced imaging techniques for better characterization and explore broader industrial applications of iron sand.