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Abstrak (Bhs. Indonesia)

Telah dilakukan penelitian analisis respon resistivitas dari pemodelan fisis pada target variasi mineral besi. Penelitian ini bertujuan untuk mengetahui distribusi nilai resistivitas berdasarkan pemodelan fisis dengan variasi mineral kadar besi. Menggunakan konfigurasi Dipole-dipole dan konfigurasi Wenner. Distribusi nilai resistivitas diperoleh dengan melakukan pemodelan fisis skala laboratorium dengan menggunakan Resistivtymeter Syscal 568 dengan target berbentuk bola. Target terbuat dari campuran pasir besi, pasir kwarsa dan semen berdiameter 10 cm dengan kadar 0%, 40% dan 80%. Panjang lintasan 100 cm dan jarak spasi antar elektroda 5 cm. Nilai resistivitas konfigurasi Wenner untuk tanpa target  18,9 – 77,5 Ωm, target 0% antara 20,7 – 25,2 Ωm, target 40 % antara 26,6 – 33,6 Ωm, target 80 % antara 19,0 – 28,3 Ωm dan target 80 % kedalaman 25 cm 22,2 – 79,6 Ωm. Sedangakan untuk konfigurasi Dipole-dipole tanpa target 13,5 – 39,4 Ωm target 0% antara 12,9 – 48,3 Ωm, target 40 % antara 10,4 – 53,8 Ωm, target 80 % antara 11,1 – 53,2 Ωm dan target 80 % kedalaman 25 cm antara 13 – 55 Ωm. Berdasarkan hasil pemodelan didapatkan nilai resistivitas lebih rendah untuk variasi komposisi kandungan kadar besi yang semakin tinggi, hal ini dikarenakan pasir besi mempunyai konduktivitas yang sangat baik.

Abtrak (Bhs. Inggris)

ABSTRACT
That have been done research by the title resistivity response analysis of physical modeling on the variation target of iron minerals. This research aims to know distribution value ofresistivityvalue from physical modeling with variation of iron mineral degree. Type of configuration is used a dipole-dipole configuration and Wenner configuration. Distribution of resistivity value are obtained by doing physical modeling laboratory scale with Resistivity Meter syscal 568 and with target that have form like a ball. Target is made by compound of ferruginous sand, quartz sand and cement with diameter 10 cm with degree 0%, 40% and 80%. The track length is 100 cm and the distance between electrode spacing is 5 cm. The calue of configuration resistivity for Wenner without target is 18.9-77.5 Ωm,on target 0% between 9.59-19,3 Ωm, on target 40% between 6.67-28.8 Ωm, on target 80% between 15,5-21.1 Ωm and on target 80% of depth 25 cm between 22.2-79.6 Ωm. Whereas for Dipole-dipole configuration without target is 13.5-39.4 Ωm, on target 0% between 28.2-42.6Ωm, on target 40% between 13.1-43.8Ωm, on target 80% between 36.4-54.8Ωm and on target 80% of depth 25 cm between 13-55Ωm. Based on modeling result shows that lower resistivity value for higher degree of ferruginous sand. It happens because ferruginous sand is the best conductivity.

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