دورية أكاديمية
From Gondwana to Europe: The journey of Elba Island (Italy) as recorded by U–Pb detrital zircon ages of Paleozoic metasedimentary rocks
| العنوان: | From Gondwana to Europe: The journey of Elba Island (Italy) as recorded by U–Pb detrital zircon ages of Paleozoic metasedimentary rocks |
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| المؤلفون: | Sirevaag, H., Jacobs, J., Ksienzyk, A. K., ROCCHI, SERGIO, PAOLI, GABRIELE, Jørgensen, H., Košler, J. |
| المساهمون: | Sirevaag, H., Jacobs, J., Ksienzyk, A. K., Rocchi, Sergio, Paoli, Gabriele, Jørgensen, H., Košler, J. |
| سنة النشر: | 2016 |
| المجموعة: | ARPI - Archivio della Ricerca dell'Università di Pisa |
| مصطلحات موضوعية: | U–Pb detrital zircon age, Tuscan Paleozoic basement, Provenance analysis, Porto Azzurro Unitl, Ortano Unit, Monticiano–Roccastrada Unit |
| الوصف: | Elba Island, located midway between Corsica and mainland Italy, is a small but important fragment of the Adria Plate. It has a rich sedimentary record preserved in a stack of tectonic nappes of both continental margin and oceanic origin. Especially the detrital zircons in early Paleozoic to early Mesozoic metasedimentary rocks provide an archive of many important geological events in the island's history. Elba Island and Adria originated along the northern margin of Gondwana, but drifted north in Silurian times to become part of Europe. A large new dataset of LA-ICP-MS and SIMS U-Pb zircon ages allows us to trace this history. Three main stratigraphic units have been investigated. The oldest Porto Azzurro Unit was deposited in the early Cambrian and has zircon age distributions indicating a typical northern African provenance, most likely sourced from the Saharan Metacraton. The Ortano Unit has a simple, mostly unimodal Ordovician age distribution that is entirely dominated by metavolcanic rocks and their erosional products; a sample of the metavolcanic Ortano Porphyroids provided a SIMS U-Pb zircon age of 460. ±. 3. Ma. This phase of intense volcanism is related to the subduction of the Rheic Ocean beneath Gondwana, terminating with initial rifting and subsequent opening of the Paleotethys. This also marks the onset of the separation of a range of European terranes, including Adria and future Elba Island, from Gondwana. The Permo-Triassic Monticiano-Roccastrada Unit is the first to show a European provenance with the appearance of large amounts of Variscan and late to post-Variscan detritus. The presence of Variscan detrital zircons in the Permo-Triassic sediments is unexpected, since a Variscan age signature is so far not well recorded in the Adria Plate. This dataset is the most comprehensive detrital zircon dataset so far available for the Adria Plate and documents Adria's close affinity to Africa in the Lower Paleozoic, as well as its initial rifting within an active continental margin setting during the ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | STAMPA |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/wos/WOS:000397872600017; volume:38; firstpage:273; lastpage:288; numberofpages:16; journal:GONDWANA RESEARCH; http://hdl.handle.net/11568/797506Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84962287636; https://www.sciencedirect.com/science/article/pii/S1342937X16000290Test |
| DOI: | 10.1016/j.gr.2015.12.006 |
| الإتاحة: | https://doi.org/10.1016/j.gr.2015.12.006Test http://hdl.handle.net/11568/797506Test https://www.sciencedirect.com/science/article/pii/S1342937X16000290Test |
| حقوق: | info:eu-repo/semantics/restrictedAccess |
| رقم الانضمام: | edsbas.456CFBBB |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.gr.2015.12.006 |
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