Abstract
This research has been done in the mining area of andesite rock of Awang Bangkal village by using magnetic method. Magnetic method is one of the most common geophysical methods used for preliminary surveys on petroleum, earth, and mineral rock exploration. It is intended to determine the subsurface distribution in the area by performing qualitative and quantitative interpretations based on the magnetism value of the earth. The result of data processing using geosoft oasis montaj software shows that the total magnetic field anomaly is -807,3 to -361,7 nT. Qualitative interpretation is done by looking at the contour map of the anomaly, the result of upward continuation and the reduction to the poles. While the interpretation is done by making a modeling of the path that has been determined using mag2dc software. The model shows that the rocks that dominate the area are andesite rocks with their susceptibility value of 0.0992 to 0.2305 in SI units.
Highlights
−This research has been done in the mining area of andesite rock
most common geophysical methods used for preliminary surveys on petroleum
quantitative interpretations based on the magnetism value of the earth
Summary
Volume 16, Number 2, Agustus 2019 ISSN : 1829-796X (print); 2514-1713 (online) https://ppjp.ulm.ac.id/journal/index.php/f/. Junaidi (2015) telah melakukan penelitian yang sama menggunakan metode magnetik di daerah Ranu Betok. Berdasarkan hasil pengolahan data dan interpretasi magnetik diperoleh bahwadi daerah penelitian didominasi oleh batuan lava, breksi,andesit dan basal. Nilai anomali magnet tersebut dapat ditafsirkan batuan penyusunnya berdasarkan hasil pemodelan yang dilakukan. Penelitian juga telah dilakukan mendeteksi potensi panas bumi di bagian palung Benue daerah Kaltungo, Guyok, Lau dan Dong, Nigeria Timur Laut menggunakan analisis kedalaman spektral dari data aeromagnetik. Penelitian ini bertujuan untuk menentukan struktur bawah permukaan berdasarkan nilai kemagnetan bumi dan sebaran batuan andesitnya dengan menggunakan metode magnetik. METODE PENELITIAN Peralatan yang digunakan pada saat pengambilan data magnetik adalah PPM (Proton Precession Magnetometer) tipe GSM-19T, GPS tipe Navigasi, Geosoft oasis montaj, surfer 12, dan mag2dc.
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