ANALISA TINGKAT KEMAGNETAN DAN SUSEPTIBILITAS MAGNETIK DARI PASIR BESI DI PANTAI PADANG SUMATERA BARAT MENGGUNAKAN PROBE MAGNETIK PASCO PS-2162

Abstract

The measurement of the magnetic degree and magnetic susceptibility of iron sand deposited along Padang beach West Sumatra has been done. The amount of sample of each location was 10 Kg. The sample was completely dried under sun ray before being processed by iron sand separator. The value of total magnetic induction was measured using a magnetic sensor called Pasco magnetic probe PS-2162. Prior to magnetic measurement, it was preparared a rectangular solenoid of 400 turns with the length of 10,0 cm, and side of 3,0 cm. The concentrate of iron sand obtained from iron sand separator was inserted as a core of the solenoid. The total magnetic induction value was measured as a funcion of applied current (2- 10A) to the solenoid and horizontal distance (1-5 mm). The results of this research showed that the highest magnetic degree value of iron sand was obtained from the sample of location B with the value of 5.5%, while the lowest value of magnetic degree was originated from location A with the value of 1.5%. Moreover, the total magnetic induction of the solenoid increased as electric current of the solenoid was increased, and the total value of magnetic induction decreased as a function of the horizontal distance. It was observed that the highest value of magnetic susceptibility was obtained from location B with the value of 4.84 × 10-4 m3 / kg, and the lowest value of magnetic susceptibility from location A with the value of 3.03 × 10-4 m3 / kg. The magnetic susceptibility values obtained were within the interval of 0,001 x 10-4 m3 / kg to 11 x 10-4 m3 / kg, which means that iron sand concentrate derived from Padang beach contains of Fe2O3 and Fe3O4.