TY - JOUR AU - Sehah, S AU - Raharjo, Sukmaji Anom PY - 2017/12/30 Y2 - 2024/03/29 TI - APPLICATION OF MAGNETIC SURVEY TO EXPLORE THE IRON ORE DEPOSITS IN THE NUSAWUNGU COASTAL REGENCY OF CILACAP CENTRAL JAVA JF - Jurnal Penelitian Fisika dan Aplikasinya (JPFA) JA - J. Penelit. Fis. Apl. VL - 7 IS - 2 SE - Articles DO - 10.26740/jpfa.v7n2.p79-88 UR - https://journal.unesa.ac.id/index.php/jpfa/article/view/1630 SP - 79-88 AB - <p><em>The research </em><em>aiming</em><em> to explore the iron ore deposits in the Nusawungu </em><em>c</em><em>oastal Regency of Cilacap has been conducted using the magnetic survey. The acquisition of magnetic data was conducted in April Mei 2017, covering the area in the ranges of 109.314</em><em>°</em><em> 109.345</em><em>°</em><em>E and 7.691</em><em>°</em><em> 7.709</em><em>°</em><em>S. The obtained magnetic field strength data were corrected, reduced, and mapped to obtain the </em><em>contour map of </em><em>local magnetic anomaly. The modeling process was carried out along the path extending over the map from the positions of 109.314</em><em>°</em><em>E and 7.695</em><em>°</em><em>S to 109.335</em><em>°</em><em>E and 7.699</em><em>°</em><em>S, so that some subsurface anomalous objects </em><em>are</em><em> obtained. The lithological interpretation was performed to identify </em><em>the </em><em>types of subsurface rocks and their formation</em><em>s</em><em> based on the magnetic susceptibility value of each anomalous objects </em><em>and</em><em> supported by the geological information of the research area. Based on the interpretation results, three rocks deposits of alluvium formation</em><em>s</em><em> w</em><em>ere</em><em> obtained, which are estimated to contain iron ore. The first deposit has a length of 164.85 m, a depth of 0.57 8.43 m, and a magnetic susceptibility value of 0.0097 cgs. The second deposit has a length of 376.28 m, a depth of 2.56 19.66 m, and a magnetic susceptibility value of 0.0108 cgs. The third deposit has a length of 1,306.26 m, a depth of 3.70 58.69 m, and a magnetic susceptibility value of 0.0235 cgs. Out of the whole rocks deposits, the third rock deposit is interpreted to have the most prospective iron ore. This </em><em>interpretation</em><em> based on its high magnetic susceptibility value, which indicates the presence of many magnetic minerals (i.e. iron ores) in the rock.</em><em></em></p> ER -