Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years
We sampled a short (57 cm) sediment core in Limnopolar Lake (Byers Peninsula, Livingston Island, South Shetland Islands), which spans the last ca. 1600 years. The core was sectioned at high resolution and analyzed for elemental and mineralogical composition, and scanning electron microscope and ener...
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Online Access: | http://hdl.handle.net/10261/99751 https://doi.org/10.5194/se-5-651-2014 |
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ftcsic:oai:digital.csic.es:10261/99751 2024-02-11T09:55:58+01:00 Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years Martínez Cortizas, A. Rozas Muñiz, I. Taboada, T. Toro, M. Granados, I. Giralt, Santiago Pla-Rabes, S. 2014 http://hdl.handle.net/10261/99751 https://doi.org/10.5194/se-5-651-2014 en eng Copernicus Publications Publisher's version http://dx.doi.org/10.5194/se-5-651-2014 Sí Solid Earth, 5: 651-663 (2014) 1869-9510 http://hdl.handle.net/10261/99751 doi:10.5194/se-5-651-2014 1869-9529 open artículo http://purl.org/coar/resource_type/c_6501 2014 ftcsic https://doi.org/10.5194/se-5-651-2014 2024-01-16T10:00:06Z We sampled a short (57 cm) sediment core in Limnopolar Lake (Byers Peninsula, Livingston Island, South Shetland Islands), which spans the last ca. 1600 years. The core was sectioned at high resolution and analyzed for elemental and mineralogical composition, and scanning electron microscope and energy dispersive X-ray spectrometer (SEM-EDS) analysis of glass mineral particles in selected samples. The chemical record was characterized by a contrasted pattern of layers with high Ca, Ti, Zr, and Sr concentrations and layers with higher concentrations of K and Rb. The former were also enriched in plagioclase and, occasionally, in zeolites, while the latter were relatively enriched in 2 : 1 phyllosilicates and quartz. This was interpreted as reflecting the abundance of volcaniclastic material (Ca rich) versus Jurassic–Lower Cretaceous marine sediments (K rich) – the dominant geological material in the lake catchment. SEM-EDS analysis revealed the presence of abundant volcanic shards in the Ca-rich layers, pointing to tephras most probably related to the activity of Deception Island volcano (located 30 km to the SE). The ages of four main peaks of volcanic-rich material (AD ca. 1840–1860 for L1, AD ca. 1570–1650 for L2, AD ca. 1450–1470 for L3, and AD ca. 1300 for L4) matched reasonably well the age of tephra layers (AP1 to AP3) previously identified in lakes of Byers Peninsula. Some of the analyzed metals (Fe, Mn, Cu, and Cr) showed enrichments in the most recent tephra layer (L1), suggesting relative changes in the composition of the tephras as found in previous investigations. No evidence of significant human impact on the cycles of most trace metals (Cu, Zn, Pb) was found, probably due to the remote location of Livingston Island and the modest research infrastructures; local contamination was found by other researchers in soils, waters and marine sediments on areas with large, permanent research stations. Chromium is the only metal showing a steady enrichment in the last 200 years, but this cannot be directly ... Article in Journal/Newspaper Antarc* Antarctica Deception Island Livingston Island South Shetland Islands Digital.CSIC (Spanish National Research Council) Byers ENVELOPE(-60.283,-60.283,-63.900,-63.900) Byers peninsula ENVELOPE(-61.066,-61.066,-62.633,-62.633) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Limnopolar Lake ENVELOPE(-61.098,-61.098,-62.633,-62.633) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) South Shetland Islands Solid Earth 5 2 651 663 |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
We sampled a short (57 cm) sediment core in Limnopolar Lake (Byers Peninsula, Livingston Island, South Shetland Islands), which spans the last ca. 1600 years. The core was sectioned at high resolution and analyzed for elemental and mineralogical composition, and scanning electron microscope and energy dispersive X-ray spectrometer (SEM-EDS) analysis of glass mineral particles in selected samples. The chemical record was characterized by a contrasted pattern of layers with high Ca, Ti, Zr, and Sr concentrations and layers with higher concentrations of K and Rb. The former were also enriched in plagioclase and, occasionally, in zeolites, while the latter were relatively enriched in 2 : 1 phyllosilicates and quartz. This was interpreted as reflecting the abundance of volcaniclastic material (Ca rich) versus Jurassic–Lower Cretaceous marine sediments (K rich) – the dominant geological material in the lake catchment. SEM-EDS analysis revealed the presence of abundant volcanic shards in the Ca-rich layers, pointing to tephras most probably related to the activity of Deception Island volcano (located 30 km to the SE). The ages of four main peaks of volcanic-rich material (AD ca. 1840–1860 for L1, AD ca. 1570–1650 for L2, AD ca. 1450–1470 for L3, and AD ca. 1300 for L4) matched reasonably well the age of tephra layers (AP1 to AP3) previously identified in lakes of Byers Peninsula. Some of the analyzed metals (Fe, Mn, Cu, and Cr) showed enrichments in the most recent tephra layer (L1), suggesting relative changes in the composition of the tephras as found in previous investigations. No evidence of significant human impact on the cycles of most trace metals (Cu, Zn, Pb) was found, probably due to the remote location of Livingston Island and the modest research infrastructures; local contamination was found by other researchers in soils, waters and marine sediments on areas with large, permanent research stations. Chromium is the only metal showing a steady enrichment in the last 200 years, but this cannot be directly ... |
format |
Article in Journal/Newspaper |
author |
Martínez Cortizas, A. Rozas Muñiz, I. Taboada, T. Toro, M. Granados, I. Giralt, Santiago Pla-Rabes, S. |
spellingShingle |
Martínez Cortizas, A. Rozas Muñiz, I. Taboada, T. Toro, M. Granados, I. Giralt, Santiago Pla-Rabes, S. Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years |
author_facet |
Martínez Cortizas, A. Rozas Muñiz, I. Taboada, T. Toro, M. Granados, I. Giralt, Santiago Pla-Rabes, S. |
author_sort |
Martínez Cortizas, A. |
title |
Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years |
title_short |
Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years |
title_full |
Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years |
title_fullStr |
Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years |
title_full_unstemmed |
Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years |
title_sort |
factors controlling the geochemical composition of limnopolar lake sediments (byers peninsula, livingston island, south shetland island, antarctica) during the last ca. 1600 years |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
http://hdl.handle.net/10261/99751 https://doi.org/10.5194/se-5-651-2014 |
long_lat |
ENVELOPE(-60.283,-60.283,-63.900,-63.900) ENVELOPE(-61.066,-61.066,-62.633,-62.633) ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(-61.098,-61.098,-62.633,-62.633) ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Byers Byers peninsula Deception Island Limnopolar Lake Livingston Island South Shetland Islands |
geographic_facet |
Byers Byers peninsula Deception Island Limnopolar Lake Livingston Island South Shetland Islands |
genre |
Antarc* Antarctica Deception Island Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctica Deception Island Livingston Island South Shetland Islands |
op_relation |
Publisher's version http://dx.doi.org/10.5194/se-5-651-2014 Sí Solid Earth, 5: 651-663 (2014) 1869-9510 http://hdl.handle.net/10261/99751 doi:10.5194/se-5-651-2014 1869-9529 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/se-5-651-2014 |
container_title |
Solid Earth |
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5 |
container_issue |
2 |
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651 |
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1790599760603774976 |