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Aulia, Putri
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Journal : Jurnal Fisika Unand

 1 
Analisis Suseptibilitas Magnetik Tanah Permukaan sebagai Indikator Longsor di Bukit Karan Padang Aulia, Putri; Afdal, Afdal
Jurnal Fisika Unand Vol 9 No 4 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.9.4.472-478.2020

Abstract

Penelitian mengenai analisis nilai suseptibilitas magnetik tanah permukaan daerah potensi longsor di Bukit Karan Padang telah dilakukan. Pengambilan sampel dilakukan pada sisi Bukit Karan yang berada di Kelurahan Rawang Kecamatan Padang Selatan dengan berjarak 10 m dari pemukiman penduduk. Sampel diambil pada empat lintasan yaitu lintasan A, B, C, dan D dengan jarak antar lintasan 20 m. Setiap lintasan terdiri dari 10 titik dengan jarak antar titik yaitu 10 m, sehingga membentuk grid yang terdiri dari 40 titik. Pengukuran suseptibilitas magnetik menggunakan MS2B Bartington Susceptibility Meter dengan dua frekuensi, yaitu frekuensi rendah (0,47 kHz) dan frekuensi tinggi (4,7 kHz). Hasil penelitian menunjukkan bahwa keseluruhan sampel memiliki nilai suseptibilitas magnetik pada frekuensi rendah (χLF) berkisar antara 120,2×10-8 m3/kg dan 458,5×10-8m3/kg dengan rata-rata 208,2x10-8m3/kg. Dari hasil tersebut diperkirakan bahwa mineral magnetik yang terkandung dalam sampel bersifat Paramagnetik dan Ferimagnetik dan jenis  mineralnya diperkirakan mineral Hematit (Fe2O3). Hasil menunjukkan bahwa 87,5% sampel memiliki nilai χFD (%) antara 2,00% - 10,0%. Hal ini menunjukkan bahwa lokasi penelitian memiliki kandungan bulir superparamagnetik yang tinggi sehingga sampel-sampel tersebut bersifat halus dan mudah untuk menyerap air sehingga potensi longsor pada daerah tersebut cukup tinggi. Research on the analysis of the magnetic susceptibility value of surface soil in landslide potential areas in Bukit Karan Padang has been done. Soil samples were collected from the hillside in Rawang Village South Padang 10 m away from the residential area. Samples were taken on four paths, namely lines A, B, C, dan D, with a distance between the path is 20 m. Each path consists of 10 points with a distance between the point is 10 m. Magnetic susceptibility measured using Bartington Susceptibility Meter MS2B with two frequencies, namely low frequency (0.47 kHz) dan high frequency (4.7 kHz). The results show that all samples have the value of low frequency magnetic susceptibility (χLF) ranged from 120.2×10-8 m3/kgand 458.5×10-8m3/kg and average of 208.2x10-8m3/kg. From these results it is estimated that the magnetic minerals contained in the sample are Paramagnetic and Ferimagnetic and the mineral type is estimated to be the Hematite (Fe2O3). The result showed that 87.5% samples have a value of χFD (%) between 2.00% - 10.0%. The result indicates that the research location has a high Superparamagnetic grain content so that the samples are fine and easy to absorb water so have enough potential for landslides.
Co-Authors Adam, Aura Masitha Adiansyah Afdal Afdal, Afdal Aghisna, Rana Agustina, Rezqi Maulanda Ahadiah Agustina Aldino, Dhafin Rizky Alfharizi, Ananda Alfitriani Siregar Allo, Jessica Iring Amalia , Riski Amanda, Silvia Ametha, Sisin Nastasya Ananda, Diaz Khalid Ananta, Herdi Gilang Andri Eko Putra, Andri Eko Anggoro, Hendi Tri Angreni , Adella Aolia, Jumatul Arif Widodo Asisa, Wafiq Az-Zahra , Natasha Az-Zahra, Natasha Azalia, Maria Benedicta Azhima, Idzni Azizah , Anisa Fitriani Azizah, Anisa Fitriani Azrina, Nabila Azzmi, Muhammad Batubara, Hafifah Bayustin, Marisa Budiman, Muhammad Akbar Carissa, Monica Dabukke, Hotromasari Dalianti, Novi Dewi, Lesta Puspita Dwi Marselina, Resya Fahrun Nur Rosyid Fatimah, Friska Nur Firmansyah Firmansyah Ginting, Rahmadani Fitri Hadji, Kuswan Hafiz Hafiza, Tia Handa, Yusti Rahayu Hasmidyani, Dwi Hutasuhut, Melfa Aisyah Iwandaka, Age Jannah, Fitriyah Nauratul JELITA, DEA PUTRI Julita Julita Jumrodah Kaisha az, Ratu Kamaruddin, Muhammad Junaid Khairani, Azka Khairunnisa, Nabila Laila, Siti Nur Lubis, Hilda Zahra Masganti Sit Mauliddya, Annisa Muhammad Basri Muhammad, Arifin Nasihah, Siti Nasution, Homsani Nia P, Tasya Halimah Nirmala, Yulia Nugraha, Dadi Mulyadi Nurhasana, Adila Nurlinda Oktasani, Reda Oktavia Nst, Adelyna Oktavia, Rani PAHLEVI, M. REZA Pandini, Anindya Intan Panggabean, Muawiyah Lani Patmawati, Nanda Permatasari, Sheila Silvia Prasetyo, Sisman Putri, Leoni Sabrilina Rahmayani, Isty Ramadani, Shoumi Ramadhani , Nabila Ramadhani, Nabila Rambe, Aulai Ramadhani Rambe, Riris Nurkholidah Restu Agusti Rifany, May Riski Amalia, Riski Riski, M Rosmiati Sangadah , Lailatul Sangadah, Lailatul Sanggar Wati, Amilia Sanjaya Gajah, Ewin Satria, Doni Sayfriani, Angela Sekar Ayu Larasati Sijabat, Salomo Siregar, Jihan Fadiyah Fithri Siregar, Jihan Fadiyah Fitri Sitorus, Ahmad Syukri Solikatun Sukiswo, Helmy Wahyu SUPRIYONO . Suratman Suratman Syafruddin Syafruddin Taufaturrahman Totok Sudiyanto, Totok Ummi, Insyafiatul Waldani, Anggi Jumiafitri Windiati Yanti, Inda Hadi Zahra Vadinda, Farell Zainuddin, Sahida Binti