Distribution of Rare Earth Elements in Sediments of the Marine Lake Mir (Dugi Otok, Croatia)
The Lake Mir represents a small, isolated, and shallow marine lake situated in the south-eastern part of the Dugi otok Island, in a karstic landscape of the eastern Adriatic coast. The surrounding karstic background, with occasional occurrences of red soil, characterizes the sediments in the lake as...
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MDPI AG
2018-08-01
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| Series: | Geosciences |
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| Online Access: | http://www.mdpi.com/2076-3263/8/8/301 |
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| author | Željka Fiket Marina Mlakar Goran Kniewald |
| author_facet | Željka Fiket Marina Mlakar Goran Kniewald |
| author_sort | Željka Fiket |
| collection | DOAJ |
| description | The Lake Mir represents a small, isolated, and shallow marine lake situated in the south-eastern part of the Dugi otok Island, in a karstic landscape of the eastern Adriatic coast. The surrounding karstic background, with occasional occurrences of red soil, characterizes the sediments in the lake as coarse grained and carbonate rich. Previous studies suggested the prevailing influence of the lake bathymetry, that is, the proportion of carbonates and grain size characteristics of the sediments, on the variability of the element composition of the lake sediments. To confirm previous assumptions and obtain a better understanding of the factors influencing sediment composition of this marine lake, the distribution of rare earth elements in sediments of the Lake Mir and the nearby Telašćica Bay, as well as surrounding soils, was investigated. In the lake sediments, the sum of rare earth elements, including Y (hereinafter referred as ΣREY), ranged from 10.6 mg kg−1 to 25.3 mg kg−1; in the Telašćica Bay sediments, ΣREY were higher compared to the lake and ranged from 56.4 mg kg−1 to 85.2 mg kg−1, while the highest ΣREY, from 83.3 mg kg−1 to 227 mg kg−1, were observed in soils surrounding the lake. Despite the difference in the levels of the rare earth elements, the REY normalized patterns and associated fractionation parameters (ΣLREE/ΣHREE, (La/Yb)N, and (Nd/Yb)N) showed similarities between the lake sediments and the surrounding soils, confirming a significant influence of local lithology on the lake composition. The results of the statistical analysis, on the other hand, suggest the contribution of both the carbonate (e.g., calcite) and non-carbonate minerals (i.e., alumosilicates and Al–Fe-hydroxides) on the total REY content in the lake sediments. |
| first_indexed | 2024-04-14T07:00:39Z |
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| language | English |
| last_indexed | 2024-04-14T07:00:39Z |
| publishDate | 2018-08-01 |
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| series | Geosciences |
| spelling | doaj.art-cf96f86c0c67458182238e8a3fbb22402022-12-22T02:06:46ZengMDPI AGGeosciences2076-32632018-08-018830110.3390/geosciences8080301geosciences8080301Distribution of Rare Earth Elements in Sediments of the Marine Lake Mir (Dugi Otok, Croatia)Željka Fiket0Marina Mlakar1Goran Kniewald2Rudjer Bošković Institute, Division for Marine and Environmental Research, Bijenička 54, Zagreb 10000, CroatiaRudjer Bošković Institute, Division for Marine and Environmental Research, Bijenička 54, Zagreb 10000, CroatiaRudjer Bošković Institute, Division for Marine and Environmental Research, Bijenička 54, Zagreb 10000, CroatiaThe Lake Mir represents a small, isolated, and shallow marine lake situated in the south-eastern part of the Dugi otok Island, in a karstic landscape of the eastern Adriatic coast. The surrounding karstic background, with occasional occurrences of red soil, characterizes the sediments in the lake as coarse grained and carbonate rich. Previous studies suggested the prevailing influence of the lake bathymetry, that is, the proportion of carbonates and grain size characteristics of the sediments, on the variability of the element composition of the lake sediments. To confirm previous assumptions and obtain a better understanding of the factors influencing sediment composition of this marine lake, the distribution of rare earth elements in sediments of the Lake Mir and the nearby Telašćica Bay, as well as surrounding soils, was investigated. In the lake sediments, the sum of rare earth elements, including Y (hereinafter referred as ΣREY), ranged from 10.6 mg kg−1 to 25.3 mg kg−1; in the Telašćica Bay sediments, ΣREY were higher compared to the lake and ranged from 56.4 mg kg−1 to 85.2 mg kg−1, while the highest ΣREY, from 83.3 mg kg−1 to 227 mg kg−1, were observed in soils surrounding the lake. Despite the difference in the levels of the rare earth elements, the REY normalized patterns and associated fractionation parameters (ΣLREE/ΣHREE, (La/Yb)N, and (Nd/Yb)N) showed similarities between the lake sediments and the surrounding soils, confirming a significant influence of local lithology on the lake composition. The results of the statistical analysis, on the other hand, suggest the contribution of both the carbonate (e.g., calcite) and non-carbonate minerals (i.e., alumosilicates and Al–Fe-hydroxides) on the total REY content in the lake sediments.http://www.mdpi.com/2076-3263/8/8/301marine lakegeochemical processesrare earth elementssedimentssoils |
| spellingShingle | Željka Fiket Marina Mlakar Goran Kniewald Distribution of Rare Earth Elements in Sediments of the Marine Lake Mir (Dugi Otok, Croatia) Geosciences marine lake geochemical processes rare earth elements sediments soils |
| title | Distribution of Rare Earth Elements in Sediments of the Marine Lake Mir (Dugi Otok, Croatia) |
| title_full | Distribution of Rare Earth Elements in Sediments of the Marine Lake Mir (Dugi Otok, Croatia) |
| title_fullStr | Distribution of Rare Earth Elements in Sediments of the Marine Lake Mir (Dugi Otok, Croatia) |
| title_full_unstemmed | Distribution of Rare Earth Elements in Sediments of the Marine Lake Mir (Dugi Otok, Croatia) |
| title_short | Distribution of Rare Earth Elements in Sediments of the Marine Lake Mir (Dugi Otok, Croatia) |
| title_sort | distribution of rare earth elements in sediments of the marine lake mir dugi otok croatia |
| topic | marine lake geochemical processes rare earth elements sediments soils |
| url | http://www.mdpi.com/2076-3263/8/8/301 |
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