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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ftdoajarticles:oai:doaj.org/article:669685557fc54e11910a6c1b90d2d44d 2023-05-15T13:49:36+02:00 Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years A. Martínez Cortizas I. Rozas Muñiz T. Taboada M. Toro I. Granados S. Giralt S. Pla-Rabés 2014-07-01T00:00:00Z https://doi.org/10.5194/se-5-651-2014 https://doaj.org/article/669685557fc54e11910a6c1b90d2d44d EN eng Copernicus Publications http://www.solid-earth.net/5/651/2014/se-5-651-2014.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 1869-9510 1869-9529 doi:10.5194/se-5-651-2014 https://doaj.org/article/669685557fc54e11910a6c1b90d2d44d Solid Earth, Vol 5, Iss 2, Pp 651-663 (2014) Geology QE1-996.5 Stratigraphy QE640-699 article 2014 ftdoajarticles https://doi.org/10.5194/se-5-651-2014 2022-12-31T00:05:27Z 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 Directory of Open Access Journals: DOAJ Articles South Shetland Islands Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Byers ENVELOPE(-60.283,-60.283,-63.900,-63.900) Byers peninsula ENVELOPE(-61.066,-61.066,-62.633,-62.633) Limnopolar Lake ENVELOPE(-61.098,-61.098,-62.633,-62.633) Solid Earth 5 2 651 663 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Stratigraphy QE640-699 |
spellingShingle |
Geology QE1-996.5 Stratigraphy QE640-699 A. Martínez Cortizas I. Rozas Muñiz T. Taboada M. Toro I. Granados S. Giralt S. Pla-Rabés Factors controlling the geochemical composition of Limnopolar Lake sediments (Byers Peninsula, Livingston Island, South Shetland Island, Antarctica) during the last ca. 1600 years |
topic_facet |
Geology QE1-996.5 Stratigraphy QE640-699 |
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 |
A. Martínez Cortizas I. Rozas Muñiz T. Taboada M. Toro I. Granados S. Giralt S. Pla-Rabés |
author_facet |
A. Martínez Cortizas I. Rozas Muñiz T. Taboada M. Toro I. Granados S. Giralt S. Pla-Rabés |
author_sort |
A. Martínez Cortizas |
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 |
https://doi.org/10.5194/se-5-651-2014 https://doaj.org/article/669685557fc54e11910a6c1b90d2d44d |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-60.283,-60.283,-63.900,-63.900) ENVELOPE(-61.066,-61.066,-62.633,-62.633) ENVELOPE(-61.098,-61.098,-62.633,-62.633) |
geographic |
South Shetland Islands Deception Island Livingston Island Byers Byers peninsula Limnopolar Lake |
geographic_facet |
South Shetland Islands Deception Island Livingston Island Byers Byers peninsula Limnopolar Lake |
genre |
Antarc* Antarctica Deception Island Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctica Deception Island Livingston Island South Shetland Islands |
op_source |
Solid Earth, Vol 5, Iss 2, Pp 651-663 (2014) |
op_relation |
http://www.solid-earth.net/5/651/2014/se-5-651-2014.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 1869-9510 1869-9529 doi:10.5194/se-5-651-2014 https://doaj.org/article/669685557fc54e11910a6c1b90d2d44d |
op_doi |
https://doi.org/10.5194/se-5-651-2014 |
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