Analysis of Vibrating Sample Magnetometer (VSM) data of Brantas river sediments using HYSITS

Several vital activities in East Java are supported by the Brantas River, ranging from irrigation, supply of water raw materials, to industry. Along with the growing population, has the potential to increase the pollution that occurs in the Brantas River. VSM data was taken from the measurement results in Brantas River sediments. The aim of this study is to analyze the VSM measurement data in the Brantas River using the HYSITS script. The analysis was carried out to determine the type of magnetic domain contained in the Brantas river sediment. HYSITS program is used to provides a deeper and better analysis and interpretation. The results show that HYSITS produces 2 curves besides hysteresis loop graphic, that is 1st derivative of ΔM curve and ΔM curve. From the Hysteresis curve of sample, it is known that the Saturation Magnetization (Ms ) value are 5.3262 - 5.998587 emu/g, the Saturation Remanent Magnetization (Mrs ) value are 1.1537 - 1.545586 emu/g, the Magnetic Coercivity (Bc ) value are 0.0188 - 0.020784 T, and Magnetic Remanent Coercivity (Bcr ) are 0.059891 - 0.0815. Result of the analysis indicates that the magnetic minerals in Brantas River are strongly suspected to represent ferrimagnetic minerals with Pseudo-Single Domain (PSD).