Distribution of Magnetic Susceptibility of Sedimentary Rock in Gending River, Karangsambung, Jawa Tengah
Hafiz Rizaldi a, Firman Syaifuddin a, Wien Lestari a , Mariyanto Mariyanto a, Silvia Jannatul Fajar b, Satria Bijaksana b
a Department of Geophysical Engineering, Faculty of Civil, Environmental and Geo Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia
b Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung 40132, Indonesia
Abstract
Karangsambung is one of Indonesia a geological site that has an expert complexity structure. Many outcrop has been unfold here, especially sedimentary rocks. This research has been conducted to determine the pattern of magnetic susceptibility and the status of sedimentary rocks In Gending River, Karangsambung, Central Java. Magnetic susceptibility parameters have been measured by Bartington MS2B from 24 samples that taken in Gending River, Karangsambung. The result shows that the maximum susceptibility is distributed around northward and eastward, while the intermediate and minimum susceptibility are distributed around nortward-eastward and eastward-southward. The measurements show that samples from Kaligending River on waturanda formation had the highest mass-specific magnetic susceptibility values, varying approximately from 1000 to 4000 × 10-8 m3 /kg. Contrarily, samples from the totogan formation had a much lower mass-specific magnetic susceptibility, varying approximately from 1000 to 2000 × 10-8 m3 /kg unexpectedly. The difference in magnetic susceptibility is alleged to the differences between magnetic mineral content in these formations.
Keywords: Karangsambung, Sedimentary Rocks, Magnetic susceptibility
Topic: Rock Magnetism