Study of Frequency-Dependent Magnetic Susceptibility to the Iron Sand in Takalar Regency

Vistarani Arini Tiwow (Universitas Negeri Makassar)
Meytij Jeanne Rampe (Universitas Negeri Manado)
Muhammad Arsyad (Universitas Negeri Makassar)

SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam
Vol. 7 No. 2 (2018): Volume 7 Nomor 2 (September 2018)

Research on the study of frequency-dependent magnetic susceptibility to the iron sand in Takalar Regency has been conducted. The purpose of this study was to identify dominant magnetic minerals based on magnetic susceptibility data and analyze magnetic mineral sources based on frequency-dependent magnetic susceptibility. The method used was the magnetic rock method, especially the parameters of magnetic susceptibility. Measurements were made using a Bartington MS2 Susceptibility Meter device equipped with an MS2B sensor that works at low frequency (470 Hz) and high frequency (4700 Hz). The results indicate that iron sand contains ferrimagnetic minerals, namely magnetite. The value of magnetic susceptibility at low frequency and high frequency were identical and the percentage of frequency-dependent magnetic susceptibility was less than 2% which indicates that iron sand has multidomain magnetic grains (MD). The positive correlation between magnetic susceptibility at low frequency and frequency dependent indicates the dominant source of magnetic minerals derived from pedogenic processes, namely the weathering of volcanic rocks.