Alps to Apennines zircon roller coaster along the Adria microplate margin

Abstract We have traced the particle path of high-pressure metasedimentary rocks on Elba Island, Northern Apennines, with the help of a U-Pb-Hf detrital zircon study. One quarter of the analysed zircons are surprisingly young, 41-30 Ma, with a main age peak at ca. 32 Ma, indicating an unexpected ear...

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Autores principales:	J. Jacobs, G. Paoli, S. Rocchi, A. K. Ksienzyk, H. Sirevaag, M. A. Elburg
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f094042ccf404851953fd4dde700f986
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spelling	oai:doaj.org-article:f094042ccf404851953fd4dde700f9862021-12-02T15:08:37ZAlps to Apennines zircon roller coaster along the Adria microplate margin10.1038/s41598-018-20979-w2045-2322https://doaj.org/article/f094042ccf404851953fd4dde700f9862018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-20979-whttps://doaj.org/toc/2045-2322Abstract We have traced the particle path of high-pressure metasedimentary rocks on Elba Island, Northern Apennines, with the help of a U-Pb-Hf detrital zircon study. One quarter of the analysed zircons are surprisingly young, 41-30 Ma, with a main age peak at ca. 32 Ma, indicating an unexpected early Oligocene maximum deposition age. These Oligocene ages with negative εHf indicate a volcanic source region in the central-southern Alps. Though young by geological means, these zircons record an extraordinary geodynamic history. They originated in a volcanic arc, during the convergence/collision of the the Adria microplate with Europe from ca. 65 to 30 Ma. Thereafter, the Oligocene zircons travelled ca. 400 km southward along the Adria margin and the accretionary prism to present-day Tuscany, where they were subducted to depths of at least 40 km. Shortly thereafter, they were brought to the surface again in the wake of hinge roll back of the Apennine subduction zone and the resulting rapid extensional exhumation. Such a zircon roller coaster requires a microplate that has back-to-back subduction zones with opposing polarities on two sides.J. JacobsG. PaoliS. RocchiA. K. KsienzykH. SirevaagM. A. ElburgNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q J. Jacobs G. Paoli S. Rocchi A. K. Ksienzyk H. Sirevaag M. A. Elburg Alps to Apennines zircon roller coaster along the Adria microplate margin
description	Abstract We have traced the particle path of high-pressure metasedimentary rocks on Elba Island, Northern Apennines, with the help of a U-Pb-Hf detrital zircon study. One quarter of the analysed zircons are surprisingly young, 41-30 Ma, with a main age peak at ca. 32 Ma, indicating an unexpected early Oligocene maximum deposition age. These Oligocene ages with negative εHf indicate a volcanic source region in the central-southern Alps. Though young by geological means, these zircons record an extraordinary geodynamic history. They originated in a volcanic arc, during the convergence/collision of the the Adria microplate with Europe from ca. 65 to 30 Ma. Thereafter, the Oligocene zircons travelled ca. 400 km southward along the Adria margin and the accretionary prism to present-day Tuscany, where they were subducted to depths of at least 40 km. Shortly thereafter, they were brought to the surface again in the wake of hinge roll back of the Apennine subduction zone and the resulting rapid extensional exhumation. Such a zircon roller coaster requires a microplate that has back-to-back subduction zones with opposing polarities on two sides.
format	article
author	J. Jacobs G. Paoli S. Rocchi A. K. Ksienzyk H. Sirevaag M. A. Elburg
author_facet	J. Jacobs G. Paoli S. Rocchi A. K. Ksienzyk H. Sirevaag M. A. Elburg
author_sort	J. Jacobs
title	Alps to Apennines zircon roller coaster along the Adria microplate margin
title_short	Alps to Apennines zircon roller coaster along the Adria microplate margin
title_full	Alps to Apennines zircon roller coaster along the Adria microplate margin
title_fullStr	Alps to Apennines zircon roller coaster along the Adria microplate margin
title_full_unstemmed	Alps to Apennines zircon roller coaster along the Adria microplate margin
title_sort	alps to apennines zircon roller coaster along the adria microplate margin
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/f094042ccf404851953fd4dde700f986
work_keys_str_mv	AT jjacobs alpstoapennineszirconrollercoasteralongtheadriamicroplatemargin AT gpaoli alpstoapennineszirconrollercoasteralongtheadriamicroplatemargin AT srocchi alpstoapennineszirconrollercoasteralongtheadriamicroplatemargin AT akksienzyk alpstoapennineszirconrollercoasteralongtheadriamicroplatemargin AT hsirevaag alpstoapennineszirconrollercoasteralongtheadriamicroplatemargin AT maelburg alpstoapennineszirconrollercoasteralongtheadriamicroplatemargin
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Alps to Apennines zircon roller coaster along the Adria microplate margin

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