TY - JOUR
T1 - Lithogenic and anthropogenic components in surface sediments from lake limboto as shown by magnetic mineral characteristics, trace metals, and REE geochemistry
AU - Yunginger, Raghel
AU - Bijaksana, Satria
AU - Dahrin, Darharta
AU - Zulaikah, Siti
AU - Hafidz, Abd
AU - Kirana, Kartika Hajar
AU - Sudarningsih, Sudarningsih
AU - Mariyanto, Mariyanto
AU - Fajar, Silvia Jannatul
N1 - Publisher Copyright:
© 2018 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2018/3/31
Y1 - 2018/3/31
N2 - Lake Limboto is one of the major lakes in Sulawesi, Indonesia. It is currently undergoing serious degradation due to population pressure. As more residential areas have been established around the lake, the sedimentation rate has increased because of the contribution of anthropogenic particles. In this study, the lithogenic and anthropogenic components in surface sediments from 17 points in the lake were studied and identified using a combination of magnetic and geochemical analyses. The results showed that although the magnetic susceptibility values in R (residential) and NR (non-residential) areas were relatively similar, the values of saturation isothermal remanent magnetization (SIRM) as well as those of SIRM/χLF differed significantly, implying that the magnetic characteristics of the lithogenic component (in the NR area) differ from those of the anthropogenic component (in the R area). The discrepancy between the anthropogenic and lithogenic contributions was further supported by trace metals and rare earth element (REE) contents. Sediment samples in the R area contained higher levels of Mn, La, Pr, and Gd, while in the NR area they contained higher levels of Fe, Sc, Nd, and Ce. The magnetic susceptibility also correlated strongly with Fe, Cu, Zn, and Mn contents in the NR area. A similar correlation was not observed in the R area. The results above imply that a combination of magnetic and geochemical analyses can successfully differentiate lithogenic and anthropogenic components or contributions in lake sediments.
AB - Lake Limboto is one of the major lakes in Sulawesi, Indonesia. It is currently undergoing serious degradation due to population pressure. As more residential areas have been established around the lake, the sedimentation rate has increased because of the contribution of anthropogenic particles. In this study, the lithogenic and anthropogenic components in surface sediments from 17 points in the lake were studied and identified using a combination of magnetic and geochemical analyses. The results showed that although the magnetic susceptibility values in R (residential) and NR (non-residential) areas were relatively similar, the values of saturation isothermal remanent magnetization (SIRM) as well as those of SIRM/χLF differed significantly, implying that the magnetic characteristics of the lithogenic component (in the NR area) differ from those of the anthropogenic component (in the R area). The discrepancy between the anthropogenic and lithogenic contributions was further supported by trace metals and rare earth element (REE) contents. Sediment samples in the R area contained higher levels of Mn, La, Pr, and Gd, while in the NR area they contained higher levels of Fe, Sc, Nd, and Ce. The magnetic susceptibility also correlated strongly with Fe, Cu, Zn, and Mn contents in the NR area. A similar correlation was not observed in the R area. The results above imply that a combination of magnetic and geochemical analyses can successfully differentiate lithogenic and anthropogenic components or contributions in lake sediments.
KW - Anthropogenic
KW - Lake Limboto
KW - Lithogenic
KW - Magnetic minerals
KW - Rare earth elements
KW - Surface sediment
KW - Trace metals
UR - http://www.scopus.com/inward/record.url?scp=85044985142&partnerID=8YFLogxK
U2 - 10.3390/geosciences8040116
DO - 10.3390/geosciences8040116
M3 - Article
AN - SCOPUS:85044985142
SN - 2076-3263
VL - 8
JO - Geosciences (Switzerland)
JF - Geosciences (Switzerland)
IS - 4
M1 - 116
ER -