PENENTUAN STRUKTUR BAWAH PERMUKAAN TANAH DAERAH POTENSI PANAS BUMI DENGAN METODE GEOMAGNETIK DI TINGGI RAJA KABUPATEN SIMALUNGUN

Z, Awaliyatun F. (2015) PENENTUAN STRUKTUR BAWAH PERMUKAAN TANAH DAERAH POTENSI PANAS BUMI DENGAN METODE GEOMAGNETIK DI TINGGI RAJA KABUPATEN SIMALUNGUN. Undergraduate thesis, UNIMED.

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Abstract

Penelitian ini bertujuan untuk mengetahui bagaimana struktur bawah permukaan dan untuk menentukan jenis batuan berdasarkan suseptibilitas anomalinya di daerah sumber air panas Tinggi Raja Desa Dolok Marawa Kecamatan Silou Kahean Kabupaten Simalungun. Posisi daerah sumber air panas terletak pada koordinat 476212 N – 476370 N dan 347890 E – 347780 E. Penelitian ini dilakukan dengan menggunakan metode magnetik. Pengukuran data magnetik ini menggunakan alat yang disebut PPM (Proton Precession Magnetometer). Dan titik koordinat dapat diketahui dari hasil pembacaan GPS (Global Position System). Dengan menggunakan alat ini akan diperoleh berupa data medan magnet utama bumi, variasi medan magnet bumi yang berhubungan dengan kerentanan magnet batuan. Data magnetik yang diperoleh dikurangi dengan nilai variasi harian utuk mendapatkan nilai koreksi hariannya. Untuk desain survei pengukuran metode magnetik dilakukan secara acak dengan jumlah titik ukur 60 titik dan pengolahan data anomali magnet total dilakukan dengan menggunakan program Surfer11. Untuk mendapatkan penampang anomali digunakan program Mag2dc For Windows. Hasil pengukuran magnetik menunjukan adanya variasi kuat medan magnet disetiap titik dengan nilai intensitas magnet terendah sebesar 41909,44 nT terdapat pada titik 30 pada posisi 476342 N dan 347905 E. Dan harga intensitas magnet tertinggi sebesar 41948,77 nT di titik 7 pada posisi 476250 N dan 347868 E. Dari hasil interpretasi kualitatif, nilai anomali magnetik berada pada -11,8533 nT sampai 34,6033 nT sedangkan hasil interpretasi kuantitatif pemodelan AA’ menunjukan adanya batuan sedimen dan kalsit, dengan nilai suseptibilitas -0,002; 0,006; 0.002; dan 0,015.

Item Type: Thesis (Undergraduate)
Contributors:
ContributionNameNIDN/NIDK
Thesis advisorHutahaean, Juniar196503061991031002
Call Number: 553.61 Ama p
Keywords: Magnetik, GPS, Suseptibilitas
Subjects: Q Science > QC Physics
Q Science > QC Physics > QC120 Descriptive and Experimental mechanics
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam > Fisika
Depositing User: Mrs Fitri Sry Juliati Sinaga
Date Deposited: 08 Apr 2016 08:34
URI: http://digilib.unimed.ac.id/id/eprint/12565

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