The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry.
A cryptotephra layer from the eruption of Hekla in 1947 has recently been discovered in Irish peatlands. This tephra layer represents the most recent deposition of volcanic ash in the UK prior to the eruption of Eyjafjallajökull in 2010. Here we examine the concentration and geochemistry of the Hekl...
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Online Access: | https://pure.qub.ac.uk/en/publications/4886094f-2764-4656-9186-b0ddd16a6b24 https://doi.org/10.1002/jqs.1566 |
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ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/4886094f-2764-4656-9186-b0ddd16a6b24 2024-01-14T10:06:41+01:00 The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry. Rea, Heidi A. Swindles, Graeme T. Roe, Helen 2012-05-30 https://pure.qub.ac.uk/en/publications/4886094f-2764-4656-9186-b0ddd16a6b24 https://doi.org/10.1002/jqs.1566 eng eng info:eu-repo/semantics/closedAccess Rea , H A , Swindles , G T & Roe , H 2012 , ' The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry. ' , Journal of Quaternary Science , vol. 27 , no. 4 , pp. 425-431 . https://doi.org/10.1002/jqs.1566 /dk/atira/pure/subjectarea/asjc/1900/1901 Earth and Planetary Sciences (miscellaneous) /dk/atira/pure/subjectarea/asjc/1900/1911 Palaeontology /dk/atira/pure/subjectarea/asjc/1200/1201 Arts and Humanities (miscellaneous) article 2012 ftqueensubelpubl https://doi.org/10.1002/jqs.1566 2023-12-21T23:22:27Z A cryptotephra layer from the eruption of Hekla in 1947 has recently been discovered in Irish peatlands. This tephra layer represents the most recent deposition of volcanic ash in the UK prior to the eruption of Eyjafjallajökull in 2010. Here we examine the concentration and geochemistry of the Hekla 1947 tephra in 14 peat profiles from across Northern Ireland. Electron probe microanalysis of individual tephra shards (n?=?91) reveals that the tephra is of dacitic–andesitic geochemistry and is highly similar to the Hekla 1510 tephra, although spheroidal carbonaceous particle profiles can be used for successful discrimination of the two layers. The highest concentrations of Hekla 1947 are found in western sites, probably reflecting the pathway of the ash fall event due to the prevailing wind direction. Comparable tephra concentrations from two cores (1?km apart) from a single bog and from nearby sites may suggest that tephra shard concentrations in peat profiles reflect ash fallout densities across a specific region, rather than site-specific factors associated with peatlands. This paper firmly establishes Hekla 1947 as a useful chronostratigraphic marker for the twentieth century, although within a restricted zone. Article in Journal/Newspaper Eyjafjallajökull Hekla Queen's University Belfast Research Portal Journal of Quaternary Science 27 4 425 431 |
institution |
Open Polar |
collection |
Queen's University Belfast Research Portal |
op_collection_id |
ftqueensubelpubl |
language |
English |
topic |
/dk/atira/pure/subjectarea/asjc/1900/1901 Earth and Planetary Sciences (miscellaneous) /dk/atira/pure/subjectarea/asjc/1900/1911 Palaeontology /dk/atira/pure/subjectarea/asjc/1200/1201 Arts and Humanities (miscellaneous) |
spellingShingle |
/dk/atira/pure/subjectarea/asjc/1900/1901 Earth and Planetary Sciences (miscellaneous) /dk/atira/pure/subjectarea/asjc/1900/1911 Palaeontology /dk/atira/pure/subjectarea/asjc/1200/1201 Arts and Humanities (miscellaneous) Rea, Heidi A. Swindles, Graeme T. Roe, Helen The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry. |
topic_facet |
/dk/atira/pure/subjectarea/asjc/1900/1901 Earth and Planetary Sciences (miscellaneous) /dk/atira/pure/subjectarea/asjc/1900/1911 Palaeontology /dk/atira/pure/subjectarea/asjc/1200/1201 Arts and Humanities (miscellaneous) |
description |
A cryptotephra layer from the eruption of Hekla in 1947 has recently been discovered in Irish peatlands. This tephra layer represents the most recent deposition of volcanic ash in the UK prior to the eruption of Eyjafjallajökull in 2010. Here we examine the concentration and geochemistry of the Hekla 1947 tephra in 14 peat profiles from across Northern Ireland. Electron probe microanalysis of individual tephra shards (n?=?91) reveals that the tephra is of dacitic–andesitic geochemistry and is highly similar to the Hekla 1510 tephra, although spheroidal carbonaceous particle profiles can be used for successful discrimination of the two layers. The highest concentrations of Hekla 1947 are found in western sites, probably reflecting the pathway of the ash fall event due to the prevailing wind direction. Comparable tephra concentrations from two cores (1?km apart) from a single bog and from nearby sites may suggest that tephra shard concentrations in peat profiles reflect ash fallout densities across a specific region, rather than site-specific factors associated with peatlands. This paper firmly establishes Hekla 1947 as a useful chronostratigraphic marker for the twentieth century, although within a restricted zone. |
format |
Article in Journal/Newspaper |
author |
Rea, Heidi A. Swindles, Graeme T. Roe, Helen |
author_facet |
Rea, Heidi A. Swindles, Graeme T. Roe, Helen |
author_sort |
Rea, Heidi A. |
title |
The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry. |
title_short |
The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry. |
title_full |
The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry. |
title_fullStr |
The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry. |
title_full_unstemmed |
The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry. |
title_sort |
hekla 1947 tephra in the north of ireland: regional distribution, concentration and geochemistry. |
publishDate |
2012 |
url |
https://pure.qub.ac.uk/en/publications/4886094f-2764-4656-9186-b0ddd16a6b24 https://doi.org/10.1002/jqs.1566 |
genre |
Eyjafjallajökull Hekla |
genre_facet |
Eyjafjallajökull Hekla |
op_source |
Rea , H A , Swindles , G T & Roe , H 2012 , ' The Hekla 1947 tephra in the North of Ireland: regional distribution, concentration and geochemistry. ' , Journal of Quaternary Science , vol. 27 , no. 4 , pp. 425-431 . https://doi.org/10.1002/jqs.1566 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1002/jqs.1566 |
container_title |
Journal of Quaternary Science |
container_volume |
27 |
container_issue |
4 |
container_start_page |
425 |
op_container_end_page |
431 |
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1788061133221920768 |