Expanding the tephrostratigraphical framework for the South Shetland Islands, Antarctica, by combining compositional and textural tephra characterisation
Tephra layers preserved in lake sedimentary sequences provide valuable isochrons with which to synchronise palaeoclimatic records. However, in regions where tephra inputs are dominated by a single volcanic source, overlapping chemical compositions can preclude unambiguous correlation of tephra layer...
Published in: | Sedimentary Geology |
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Online Access: | http://hdl.handle.net/10261/139633 https://doi.org/10.1016/j.sedgeo.2015.08.002 https://doi.org/10.13039/501100004837 |
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ftcsic:oai:digital.csic.es:10261/139633 2024-02-11T09:57:36+01:00 Expanding the tephrostratigraphical framework for the South Shetland Islands, Antarctica, by combining compositional and textural tephra characterisation Liu, E. J. Oliva, M. Antoniades, D. Giralt, Santiago Granados, I. Pla-Rabes, S. Toro, M. Geyer, Adelina Ministerio de Educación y Cultura (España) Ministerio de Ciencia e Innovación (España) 2016 http://hdl.handle.net/10261/139633 https://doi.org/10.1016/j.sedgeo.2015.08.002 https://doi.org/10.13039/501100004837 unknown Elsevier http://dx.doi.org/10.1016/j.sedgeo.2015.08.002 Sí doi:10.1016/j.sedgeo.2015.08.002 issn: 0037-0738 Sedimentary Geology 340: 49- 61 (2016) http://hdl.handle.net/10261/139633 http://dx.doi.org/10.13039/501100004837 none Tephrostratigraphy Volcanology Antarctica Livingston Island Deception Island Lake sediments artículo http://purl.org/coar/resource_type/c_6501 2016 ftcsic https://doi.org/10.1016/j.sedgeo.2015.08.00210.13039/501100004837 2024-01-16T10:18:25Z Tephra layers preserved in lake sedimentary sequences provide valuable isochrons with which to synchronise palaeoclimatic records. However, in regions where tephra inputs are dominated by a single volcanic source, overlapping chemical compositions can preclude unambiguous correlation of tephra layers. In this study, we characterise multiple visible (macrotephra) layers within sedimentary sequences from three lakes in Byers Peninsula, Antarctica. By combining compositional analyses with additional constraints from textural componentry, we identify three distinct tephra isochrons—T1, T2, and T3—each with distinct textural properties. The relative proportion of glassy compared to crystal-rich grains varies from ~ 50% (T3) to ~ 3% (T1) of the total sample. Although the proportion of dense to vesicular grains differs only slightly between all sampled tephra layers, the dominant vesicle shape varies from spherical (T3) to irregular and polylobate (T1/T2). These textural differences can be related to variations in the eruptive processes occurring at the Deception Island source volcano. This study highlights the efficacy of a correlative approach based on both chemical and physical tephra properties for deconvolving the tephra stratigraphy in regions where chemical compositions are non-unique. Field work in Limnopolar Lake was supported by grant POL2006-06635/CGL from the Education and Culture Ministry (Spain) in the framework of the International Polar Year 2007-09 activities. AG is grateful for her Juan de la Cierva Grant (JCI-2010-06092) and Ramón y Cajal contract (RYC-2012-11024). Part of this research was supported by the MICINN grant CTM2011-13578-E. Peer Reviewed Article in Journal/Newspaper Antarc* Antarctica Deception Island International Polar Year 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) Cierva ENVELOPE(-60.873,-60.873,-64.156,-64.156) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Island Lake ENVELOPE(166.433,166.433,-77.633,-77.633) 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 Sedimentary Geology 340 49 61 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Tephrostratigraphy Volcanology Antarctica Livingston Island Deception Island Lake sediments |
spellingShingle |
Tephrostratigraphy Volcanology Antarctica Livingston Island Deception Island Lake sediments Liu, E. J. Oliva, M. Antoniades, D. Giralt, Santiago Granados, I. Pla-Rabes, S. Toro, M. Geyer, Adelina Expanding the tephrostratigraphical framework for the South Shetland Islands, Antarctica, by combining compositional and textural tephra characterisation |
topic_facet |
Tephrostratigraphy Volcanology Antarctica Livingston Island Deception Island Lake sediments |
description |
Tephra layers preserved in lake sedimentary sequences provide valuable isochrons with which to synchronise palaeoclimatic records. However, in regions where tephra inputs are dominated by a single volcanic source, overlapping chemical compositions can preclude unambiguous correlation of tephra layers. In this study, we characterise multiple visible (macrotephra) layers within sedimentary sequences from three lakes in Byers Peninsula, Antarctica. By combining compositional analyses with additional constraints from textural componentry, we identify three distinct tephra isochrons—T1, T2, and T3—each with distinct textural properties. The relative proportion of glassy compared to crystal-rich grains varies from ~ 50% (T3) to ~ 3% (T1) of the total sample. Although the proportion of dense to vesicular grains differs only slightly between all sampled tephra layers, the dominant vesicle shape varies from spherical (T3) to irregular and polylobate (T1/T2). These textural differences can be related to variations in the eruptive processes occurring at the Deception Island source volcano. This study highlights the efficacy of a correlative approach based on both chemical and physical tephra properties for deconvolving the tephra stratigraphy in regions where chemical compositions are non-unique. Field work in Limnopolar Lake was supported by grant POL2006-06635/CGL from the Education and Culture Ministry (Spain) in the framework of the International Polar Year 2007-09 activities. AG is grateful for her Juan de la Cierva Grant (JCI-2010-06092) and Ramón y Cajal contract (RYC-2012-11024). Part of this research was supported by the MICINN grant CTM2011-13578-E. Peer Reviewed |
author2 |
Ministerio de Educación y Cultura (España) Ministerio de Ciencia e Innovación (España) |
format |
Article in Journal/Newspaper |
author |
Liu, E. J. Oliva, M. Antoniades, D. Giralt, Santiago Granados, I. Pla-Rabes, S. Toro, M. Geyer, Adelina |
author_facet |
Liu, E. J. Oliva, M. Antoniades, D. Giralt, Santiago Granados, I. Pla-Rabes, S. Toro, M. Geyer, Adelina |
author_sort |
Liu, E. J. |
title |
Expanding the tephrostratigraphical framework for the South Shetland Islands, Antarctica, by combining compositional and textural tephra characterisation |
title_short |
Expanding the tephrostratigraphical framework for the South Shetland Islands, Antarctica, by combining compositional and textural tephra characterisation |
title_full |
Expanding the tephrostratigraphical framework for the South Shetland Islands, Antarctica, by combining compositional and textural tephra characterisation |
title_fullStr |
Expanding the tephrostratigraphical framework for the South Shetland Islands, Antarctica, by combining compositional and textural tephra characterisation |
title_full_unstemmed |
Expanding the tephrostratigraphical framework for the South Shetland Islands, Antarctica, by combining compositional and textural tephra characterisation |
title_sort |
expanding the tephrostratigraphical framework for the south shetland islands, antarctica, by combining compositional and textural tephra characterisation |
publisher |
Elsevier |
publishDate |
2016 |
url |
http://hdl.handle.net/10261/139633 https://doi.org/10.1016/j.sedgeo.2015.08.002 https://doi.org/10.13039/501100004837 |
long_lat |
ENVELOPE(-60.283,-60.283,-63.900,-63.900) ENVELOPE(-61.066,-61.066,-62.633,-62.633) ENVELOPE(-60.873,-60.873,-64.156,-64.156) ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(166.433,166.433,-77.633,-77.633) ENVELOPE(-61.098,-61.098,-62.633,-62.633) ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Byers Byers peninsula Cierva Deception Island Island Lake Limnopolar Lake Livingston Island South Shetland Islands |
geographic_facet |
Byers Byers peninsula Cierva Deception Island Island Lake Limnopolar Lake Livingston Island South Shetland Islands |
genre |
Antarc* Antarctica Deception Island International Polar Year Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctica Deception Island International Polar Year Livingston Island South Shetland Islands |
op_relation |
http://dx.doi.org/10.1016/j.sedgeo.2015.08.002 Sí doi:10.1016/j.sedgeo.2015.08.002 issn: 0037-0738 Sedimentary Geology 340: 49- 61 (2016) http://hdl.handle.net/10261/139633 http://dx.doi.org/10.13039/501100004837 |
op_rights |
none |
op_doi |
https://doi.org/10.1016/j.sedgeo.2015.08.00210.13039/501100004837 |
container_title |
Sedimentary Geology |
container_volume |
340 |
container_start_page |
49 |
op_container_end_page |
61 |
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1790593150622892032 |