Magnetic Characterization of Sand and Boulder Samples from Citarum River and Their Origin

Sudarningsih Sudarningsih; Luki Maulana; Satria Bijaksana; Abd Hafidz; Aditya Pratama; Widodo Widodo; Irwan Iskandar

doi:10.5614/j.math.fund.sci.2017.49.2.2

Authors

Sudarningsih Sudarningsih Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,
Luki Maulana Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,
Satria Bijaksana Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,
Abd Hafidz Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,
Aditya Pratama Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,
Widodo Widodo Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,
Irwan Iskandar Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,

DOI:

https://doi.org/10.5614/j.math.fund.sci.2017.49.2.2

Keywords:

Citarum River, geochemistry, magnetic method, magnetic susceptibility, volcanic area

Abstract

The Citarum River is a nationally strategic river located near Bandung, the capital city of West Java Province. The feasibility of using magnetic methods for monitoring pollution level is currently being tested in the river. Due to its location in a volcanic area, the sediments from the river are expected to be highly magnetic. In this study, sand and boulder samples from Balekambang, a relatively pristine upstream area of the river, were subjected to magnetic and geochemical characterizations to establish the baseline for unpolluted sediments. Such baseline is important for future magnetic monitoring of sediments in the river. The mass-specific magnetic susceptibility of boulder samples was found to be varied from 819.2 to 2340.5 10^-8m³ kg^-1 while that of sand samples varied from 2293.9 to 3845.3 10^-8m³ kg^-1. These high magnetic susceptibility values infer that river sediments are highly magnetic even before being contaminated by industrial and household wastes. The predominant magnetic mineral in sand samples was multi-domain magnetite while that in boulder samples was single to pseudo-single domain magnetite. These differences were supported by the results from petrographic and XRF analyses, implying that the sand and boulder samples originated from different geological formations.

Author Biographies

Sudarningsih Sudarningsih, Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,

Engineering Geophysics, PhD student

Luki Maulana, Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,

Engineering Geophysics, undergraduate student

Satria Bijaksana, Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,

Engineering Geophysics, Professor

Aditya Pratama, Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,

Engineering Geophysics, Graduate student

Widodo Widodo, Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,

Engineering Geophysics, Assistant Professor

Irwan Iskandar, Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132,

Engineering Mining, Assistant Professor

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