New major element analyses of proximal tephras from the Azores and suggested correlations with cryptotephras in North‐West Europe
ABSTRACT The Azores Archipelago is one of the most active volcanic areas in the North Atlantic region. Approximately 30 eruptions have been reported over the last 600 years with some major VEI 5 (Volcanic Explosivity Index) eruptions further back in time. The geochemical composition of associated te...
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crwiley:10.1002/jqs.3155 2023-12-03T10:23:32+01:00 New major element analyses of proximal tephras from the Azores and suggested correlations with cryptotephras in North‐West Europe Wastegård, Stefan Johansson, Hans Pacheco, José M. 2019 http://dx.doi.org/10.1002/jqs.3155 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3155 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3155 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 35, issue 1-2, page 114-121 ISSN 0267-8179 1099-1417 Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) journal-article 2019 crwiley https://doi.org/10.1002/jqs.3155 2023-11-09T14:08:27Z ABSTRACT The Azores Archipelago is one of the most active volcanic areas in the North Atlantic region. Approximately 30 eruptions have been reported over the last 600 years with some major VEI 5 (Volcanic Explosivity Index) eruptions further back in time. The geochemical composition of associated tephra‐derived glass, however, is not well characterized. An Azorean origin of cryptotephras found in distal areas such as North Africa, the British Isles and Greenland has been suggested, but proximal data from the Azores are scarce and the correlations have only been tentative. These tephras have a traychtic composition, which excludes an Icelandic origin. In a previous study, we presented major element analyses of proximal tephra‐derived glass from five Holocene eruptions on the Azores Islands. There is a striking geochemical similarity between tephras from volcanoes on São Miguel and Irish cryptotephras, and especially with eruptives from the Furnas volcano. Here we present new analyses of proximal tephras that confirm and strengthen a link between Furnas and cryptotephras found in south‐west Ireland. We also suggest a correlation between a previously unsourced tephra found in a Swedish bog with an eruption of the Sete Cidades volcano c. 3880 a cal BP. Article in Journal/Newspaper Greenland North Atlantic Wiley Online Library (via Crossref) Greenland Journal of Quaternary Science 35 1-2 114 121 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) |
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Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) Wastegård, Stefan Johansson, Hans Pacheco, José M. New major element analyses of proximal tephras from the Azores and suggested correlations with cryptotephras in North‐West Europe |
topic_facet |
Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) |
description |
ABSTRACT The Azores Archipelago is one of the most active volcanic areas in the North Atlantic region. Approximately 30 eruptions have been reported over the last 600 years with some major VEI 5 (Volcanic Explosivity Index) eruptions further back in time. The geochemical composition of associated tephra‐derived glass, however, is not well characterized. An Azorean origin of cryptotephras found in distal areas such as North Africa, the British Isles and Greenland has been suggested, but proximal data from the Azores are scarce and the correlations have only been tentative. These tephras have a traychtic composition, which excludes an Icelandic origin. In a previous study, we presented major element analyses of proximal tephra‐derived glass from five Holocene eruptions on the Azores Islands. There is a striking geochemical similarity between tephras from volcanoes on São Miguel and Irish cryptotephras, and especially with eruptives from the Furnas volcano. Here we present new analyses of proximal tephras that confirm and strengthen a link between Furnas and cryptotephras found in south‐west Ireland. We also suggest a correlation between a previously unsourced tephra found in a Swedish bog with an eruption of the Sete Cidades volcano c. 3880 a cal BP. |
format |
Article in Journal/Newspaper |
author |
Wastegård, Stefan Johansson, Hans Pacheco, José M. |
author_facet |
Wastegård, Stefan Johansson, Hans Pacheco, José M. |
author_sort |
Wastegård, Stefan |
title |
New major element analyses of proximal tephras from the Azores and suggested correlations with cryptotephras in North‐West Europe |
title_short |
New major element analyses of proximal tephras from the Azores and suggested correlations with cryptotephras in North‐West Europe |
title_full |
New major element analyses of proximal tephras from the Azores and suggested correlations with cryptotephras in North‐West Europe |
title_fullStr |
New major element analyses of proximal tephras from the Azores and suggested correlations with cryptotephras in North‐West Europe |
title_full_unstemmed |
New major element analyses of proximal tephras from the Azores and suggested correlations with cryptotephras in North‐West Europe |
title_sort |
new major element analyses of proximal tephras from the azores and suggested correlations with cryptotephras in north‐west europe |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/jqs.3155 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3155 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3155 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_source |
Journal of Quaternary Science volume 35, issue 1-2, page 114-121 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.3155 |
container_title |
Journal of Quaternary Science |
container_volume |
35 |
container_issue |
1-2 |
container_start_page |
114 |
op_container_end_page |
121 |
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1784271716709564416 |