IDENTIFIKASI SIFAT MAGNETIK TANAH DI DAERAH TANAH LONGSOR

Authors

  • Rahma Andini Pratiwi Departemen Geofisika FMIPA Unpad, Jl. Raya Bandung-Sumedang KM 21 Sumedang 45363
  • Agum Gumelar Prakoso Departemen Geofisika FMIPA Unpad, Jl. Raya Bandung-Sumedang KM 21 Sumedang 45363
  • Riski Darmasetiawan Departemen Geofisika FMIPA Unpad, Jl. Raya Bandung-Sumedang KM 21 Sumedang 45363
  • Eleonora Agustine Departemen Geofisika FMIPA Unpad, Jl. Raya Bandung-Sumedang KM 21 Sumedang 45363
  • Kartika Hajar Kirana Departemen Geofisika FMIPA Unpad, Jl. Raya Bandung-Sumedang KM 21 Sumedang 45363
  • Dini Fitriani Departemen Geofisika FMIPA Unpad, Jl. Raya Bandung-Sumedang KM 21 Sumedang 45363

DOI:

https://doi.org/10.21009/0305020402

Abstract

A research has been conducted to identified magnetic properties of soil in landslides area. Soil samples had taken in two areas, area A located in landslides area and area B has not experienced landslides. We have identify magnetic parameter based on magnetic susceptibility measurements in 0,46 kHz  and 4,6 kHz . The measurement results showed that the  value of area A is 345.2 × 10-8 m3/kg to 571 × 10-8 m3/kg and the value of  in area B is 332.3 × 10-8 m3/kg to 668.1 × 10-8 m3/kg. The range of magnetic susceptibility values show that the magnetic minerals contained in the samples are classified as ferrimagnetic minerals. Relative difference between  and  is known as frequency dependent susceptibility . Calculated value of  in area A is about 2.65% to 3.33% and area B is 0.97% to 2.58%. The value of  indicates that area A contained more much superparamagnetic grains than area B. Soils that contain much superparamagnetic grains will be finer and easy to absorb water. The addition of soil mass by water could cause the soil more susceptible to landslide if located in steep slope.

Keywords: Landslides, magnetic susceptibility, superparamagnetic grain.

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Published

2016-10-30

How to Cite

Pratiwi, R. A., Prakoso, A. G., Darmasetiawan, R., Agustine, E., Kirana, K. H., & Fitriani, D. (2016). IDENTIFIKASI SIFAT MAGNETIK TANAH DI DAERAH TANAH LONGSOR. PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL), 5, SNF2016–EPA. https://doi.org/10.21009/0305020402