Keywords
geochemical
susceptibility
magnetic
tuff
Lampung
How to Cite
Abstract
DOI:10.17014/ijog.7.3.267-272
The study of rock weathering into soil is very important in geophysics. The geochemical and magnetic characteristics of soil were investigated in South Lampung using magnetic susceptibility and X-ray Fluorescence (XRF) measurements to identify the rock origin of the soil. The samples consisted of three soil types, those are granite soil, tuff soil in front of ITERA (Institut Teknologi Sumatra, South Lampung), and tuff soil inside ITERA. The tuffs (in front of and inside ITERA) and granite were taken in and around ITERA. The result showed that granite had the highest magnetic susceptibility value, while tuff soil in front of ITERA had the highest FeO content. Each sample can be distinguished by magnetic susceptibility and FeO content to prove that it can be used as a tool to distinguish the rock origin of soil.
References
Cox, K.G., Bell, J.D., and Pankhurst, R.J., 1979. The interpretation of igneous rocks. George Allen and Unwin, London, 450pp.
Dearing, J., 1999. Environmental magnetic susceptibility using the Bartington MS2 system. Bartington Instruments Ltd., Oxford, 43pp.
Di Figlia, M.G., Bellanca, A., Neri, R., and Stefansson, A., 2007. Chemical weathering of volcanic rocks at the island of Pantelleria, Italy: Information from soil profile and soil solution investigations, Chemical Geology, 246, p.1-18.
Le Maitre, R.W., Bateman, P., Dudek, A., Keller, J., Le Bas, M.J., Sabine, P.A., Schmid R., Sorensen H., Streckeisen A., Wooley A.R., and Zanettin, B., 1989. A classification of igneous rocks and glossary of terms. Blackwell, Oxford, 193pp.
Lynn, W.C. and Pearson, M.J., 2000. The Colour of Soil. Science Teacher.
Mangga, S.A., Amirudin, Suwarti, T., Gafoer, S., and Sidarto, 1993. Geological map of the Tanjungkarang Quadrangle, Sumatra, scale
:250.000. Geological Research and Development Centre, Bandung.
Natural Resource Conservation Service - Soils, United States Department of Agriculture 2019. https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/edu/?cid=nrcs142p2_054286 [15July 2019 at 18:51].
Safiuddin, L.O., Haris, V., Wirman, R.P., and Bijaksana, S., 2011. A preliminary study of the magnetic properties on laterite soils as
indicators of pedogenic processes. Latinmag Letters, 1 (1), p.1-15.
Santoso, N.A., Syaifullah, K.I., Zulaikah, S., and Bijaksana, S., 2019. Magnetic characterization of soil to determine the source origin. Case study: soil around Bromo Volcano, Tengger Volcanic Complex. IOP Conf. Series: Earth and Environmental Science, 311, p.1-4.