Penentuan Zona Caprock di Sekitar Gunung Talang Menggunakan Metode Resistivitas Konfigurasi Wenner
DOI:
https://doi.org/10.25077/jfu.7.3.253-259.2018Abstract
Penentuan zona caprock di daerah Solok telah dilakukan menggunakan metode resistivitas konfigurasi Wenner. Pengukuran dilakukan di 3 titik yang berada di daerah Cupak, Bukit Gadang dan Bukit Sundi. Terdapat tiga lintasan pengukuran dengan panjang lintasan 1050 m. Pengolahan data dilakukan menggunakan software IPI2WIN untuk mendapatkan pemodelan 1D resistivitas batuan terhadap kedalaman. Hasil pengolahan data menunjukkan pada lintasan 1 terdapat 3 lapisan batuan. Lapisan konduktif ditandai dengan nilai resistivitas <20 Ωm yang terdapat pada kedalaman di bawah 109 m. Lapisan ini diinterpretasikan sebagai batuan lempung dan berfungsi sebagai caprock (batuan penudung) Gunung Talang. Lintasan 2 menunjukkan adanya 4 lapisan batuan, dengan tidak ditemukan keberadaan zona caprock, tapi pada hasil pemodelan terdapat penurunan nilai resistivitas mulai dari kedalaman 78,7 m. Pada lintasan 3 menunjukkan 4 lapisan batuan dan pada lintasan ini juga tidak teridentifikasi zona caprock panas bumi.
Kata kunci: caprock, gunung talang, konfigurasi wenner, metode resistivitas
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