Dynamics of large pyroclastic currents inferred by the internal architecture of the Campanian Ignimbrite

Abstract Large ignimbrites are the product of devastating explosive eruptions that have repeatedly impacted climate and life on global scale. The assemblage of vertical and lateral lithofacies variations within an ignimbrite sheet, its internal architecture, may help to determine how the parental py...

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Autores principales:	Claudio Scarpati, Domenico Sparice, Annamaria Perrotta
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ffd5f31950f1480f8559fd15d754800e
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spelling	oai:doaj.org-article:ffd5f31950f1480f8559fd15d754800e2021-12-02T12:40:41ZDynamics of large pyroclastic currents inferred by the internal architecture of the Campanian Ignimbrite10.1038/s41598-020-79164-72045-2322https://doaj.org/article/ffd5f31950f1480f8559fd15d754800e2020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79164-7https://doaj.org/toc/2045-2322Abstract Large ignimbrites are the product of devastating explosive eruptions that have repeatedly impacted climate and life on global scale. The assemblage of vertical and lateral lithofacies variations within an ignimbrite sheet, its internal architecture, may help to determine how the parental pyroclastic current evolves in time and space. The 39 ka Campanian Ignimbrite eruption, vented from Campi Flegrei caldera, laid down a thick ignimbrite over an area of thousands of km2. A detailed reconstruction of the vertical and lateral variation of the seven lithofacies recognised in the ignimbrite medial sequence constrains the behaviour of this event. The pyroclastic current flowed over a wide area around Campi Flegrei without depositing (bypass zone), and inundated a huge area during most of the paroxysmal, waxing phase, emplacing a mainly incipiently- to strongly- welded ignimbrite. Following this waxing phase, the leading edge of the current retreated back towards the source as the current waned, impacting a progressively smaller area and leaving an unconsolidated ash and lapilli deposit, later lithified. Our study illustrates how large pyroclastic currents can evolve in time and space and the importance of both internal (eruptive and transport mechanisms) and external (topography, surficial water and rain) factors in governing their behaviour.Claudio ScarpatiDomenico SpariceAnnamaria PerrottaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-13 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Claudio Scarpati Domenico Sparice Annamaria Perrotta Dynamics of large pyroclastic currents inferred by the internal architecture of the Campanian Ignimbrite
description	Abstract Large ignimbrites are the product of devastating explosive eruptions that have repeatedly impacted climate and life on global scale. The assemblage of vertical and lateral lithofacies variations within an ignimbrite sheet, its internal architecture, may help to determine how the parental pyroclastic current evolves in time and space. The 39 ka Campanian Ignimbrite eruption, vented from Campi Flegrei caldera, laid down a thick ignimbrite over an area of thousands of km2. A detailed reconstruction of the vertical and lateral variation of the seven lithofacies recognised in the ignimbrite medial sequence constrains the behaviour of this event. The pyroclastic current flowed over a wide area around Campi Flegrei without depositing (bypass zone), and inundated a huge area during most of the paroxysmal, waxing phase, emplacing a mainly incipiently- to strongly- welded ignimbrite. Following this waxing phase, the leading edge of the current retreated back towards the source as the current waned, impacting a progressively smaller area and leaving an unconsolidated ash and lapilli deposit, later lithified. Our study illustrates how large pyroclastic currents can evolve in time and space and the importance of both internal (eruptive and transport mechanisms) and external (topography, surficial water and rain) factors in governing their behaviour.
format	article
author	Claudio Scarpati Domenico Sparice Annamaria Perrotta
author_facet	Claudio Scarpati Domenico Sparice Annamaria Perrotta
author_sort	Claudio Scarpati
title	Dynamics of large pyroclastic currents inferred by the internal architecture of the Campanian Ignimbrite
title_short	Dynamics of large pyroclastic currents inferred by the internal architecture of the Campanian Ignimbrite
title_full	Dynamics of large pyroclastic currents inferred by the internal architecture of the Campanian Ignimbrite
title_fullStr	Dynamics of large pyroclastic currents inferred by the internal architecture of the Campanian Ignimbrite
title_full_unstemmed	Dynamics of large pyroclastic currents inferred by the internal architecture of the Campanian Ignimbrite
title_sort	dynamics of large pyroclastic currents inferred by the internal architecture of the campanian ignimbrite
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/ffd5f31950f1480f8559fd15d754800e
work_keys_str_mv	AT claudioscarpati dynamicsoflargepyroclasticcurrentsinferredbytheinternalarchitectureofthecampanianignimbrite AT domenicosparice dynamicsoflargepyroclasticcurrentsinferredbytheinternalarchitectureofthecampanianignimbrite AT annamariaperrotta dynamicsoflargepyroclasticcurrentsinferredbytheinternalarchitectureofthecampanianignimbrite
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Dynamics of large pyroclastic currents inferred by the internal architecture of the Campanian Ignimbrite

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