Cargando…
First marine cryptotephra in Antarctica found in sediments of the western Ross Sea correlates with englacial tephras and climate records
We report the discovery of an important new cryptotephra within marine sediments close to Cape Hallett (northern Victoria Land), in the western Ross Sea, Antarctica. The cryptotephra is fully characterized for its texture, mineralogy and major- and trace-element data obtained on single glass shards....
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6650406/ https://www.ncbi.nlm.nih.gov/pubmed/31337844 http://dx.doi.org/10.1038/s41598-019-47188-3 |
_version_ | 1783438119144521728 |
---|---|
author | Di Roberto, Alessio Colizza, Ester Del Carlo, Paola Petrelli, Maurizio Finocchiaro, Furio Kuhn, Gerhard |
author_facet | Di Roberto, Alessio Colizza, Ester Del Carlo, Paola Petrelli, Maurizio Finocchiaro, Furio Kuhn, Gerhard |
author_sort | Di Roberto, Alessio |
collection | PubMed |
description | We report the discovery of an important new cryptotephra within marine sediments close to Cape Hallett (northern Victoria Land), in the western Ross Sea, Antarctica. The cryptotephra is fully characterized for its texture, mineralogy and major- and trace-element data obtained on single glass shards. On the basis of geochemical composition, the cryptotephra is unequivocally correlated with the proximal deposits of an explosive eruption of the poorly known Mount Rittmann volcano, situated in northern Victoria Land. The cryptotephra is also correlated with a widespread tephra layer, which was erupted in 1254 C.E. and is present in numerous ice-cores and blue ice fields across East and West Antarctica. The characteristics of the tephra indicate that it was produced by a prolonged, moderate energy, mostly hydromagmatic eruption. This is the first time that a cryptotephra has been identified in marine sediments of the Ross Sea and in ice cores. It provides an important new and widespread stratigraphical datum with which the continental cryosphere and marine sedimentological records in Antarctica can be correlated. Moreover, from a purely volcanological point of view, the discovery further confirms the occurrence of a long-lasting, significant explosive eruption from Mount Rittmann in historical times that produced abundant widely dispersed fine ash. The study also highlights the inadequacy of current hazard assessments for poorly known volcanoes such as Mount Rittmann, located at high southern latitudes. |
format | Online Article Text |
id | pubmed-6650406 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-66504062019-07-29 First marine cryptotephra in Antarctica found in sediments of the western Ross Sea correlates with englacial tephras and climate records Di Roberto, Alessio Colizza, Ester Del Carlo, Paola Petrelli, Maurizio Finocchiaro, Furio Kuhn, Gerhard Sci Rep Article We report the discovery of an important new cryptotephra within marine sediments close to Cape Hallett (northern Victoria Land), in the western Ross Sea, Antarctica. The cryptotephra is fully characterized for its texture, mineralogy and major- and trace-element data obtained on single glass shards. On the basis of geochemical composition, the cryptotephra is unequivocally correlated with the proximal deposits of an explosive eruption of the poorly known Mount Rittmann volcano, situated in northern Victoria Land. The cryptotephra is also correlated with a widespread tephra layer, which was erupted in 1254 C.E. and is present in numerous ice-cores and blue ice fields across East and West Antarctica. The characteristics of the tephra indicate that it was produced by a prolonged, moderate energy, mostly hydromagmatic eruption. This is the first time that a cryptotephra has been identified in marine sediments of the Ross Sea and in ice cores. It provides an important new and widespread stratigraphical datum with which the continental cryosphere and marine sedimentological records in Antarctica can be correlated. Moreover, from a purely volcanological point of view, the discovery further confirms the occurrence of a long-lasting, significant explosive eruption from Mount Rittmann in historical times that produced abundant widely dispersed fine ash. The study also highlights the inadequacy of current hazard assessments for poorly known volcanoes such as Mount Rittmann, located at high southern latitudes. Nature Publishing Group UK 2019-07-23 /pmc/articles/PMC6650406/ /pubmed/31337844 http://dx.doi.org/10.1038/s41598-019-47188-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Di Roberto, Alessio Colizza, Ester Del Carlo, Paola Petrelli, Maurizio Finocchiaro, Furio Kuhn, Gerhard First marine cryptotephra in Antarctica found in sediments of the western Ross Sea correlates with englacial tephras and climate records |
title | First marine cryptotephra in Antarctica found in sediments of the western Ross Sea correlates with englacial tephras and climate records |
title_full | First marine cryptotephra in Antarctica found in sediments of the western Ross Sea correlates with englacial tephras and climate records |
title_fullStr | First marine cryptotephra in Antarctica found in sediments of the western Ross Sea correlates with englacial tephras and climate records |
title_full_unstemmed | First marine cryptotephra in Antarctica found in sediments of the western Ross Sea correlates with englacial tephras and climate records |
title_short | First marine cryptotephra in Antarctica found in sediments of the western Ross Sea correlates with englacial tephras and climate records |
title_sort | first marine cryptotephra in antarctica found in sediments of the western ross sea correlates with englacial tephras and climate records |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6650406/ https://www.ncbi.nlm.nih.gov/pubmed/31337844 http://dx.doi.org/10.1038/s41598-019-47188-3 |
work_keys_str_mv | AT dirobertoalessio firstmarinecryptotephrainantarcticafoundinsedimentsofthewesternrossseacorrelateswithenglacialtephrasandclimaterecords AT colizzaester firstmarinecryptotephrainantarcticafoundinsedimentsofthewesternrossseacorrelateswithenglacialtephrasandclimaterecords AT delcarlopaola firstmarinecryptotephrainantarcticafoundinsedimentsofthewesternrossseacorrelateswithenglacialtephrasandclimaterecords AT petrellimaurizio firstmarinecryptotephrainantarcticafoundinsedimentsofthewesternrossseacorrelateswithenglacialtephrasandclimaterecords AT finocchiarofurio firstmarinecryptotephrainantarcticafoundinsedimentsofthewesternrossseacorrelateswithenglacialtephrasandclimaterecords AT kuhngerhard firstmarinecryptotephrainantarcticafoundinsedimentsofthewesternrossseacorrelateswithenglacialtephrasandclimaterecords |