From Gondwana to Europe: The journey of Elba Island (Italy) as recorded by U–Pb detrital zircon ages of Paleozoic metasedimentary rocks

Sirevaag, Hallgeir; Jacobs, Joachim; Ksienzyk, Anna K.; Rocchi, Sergio; Paoli, Gabriele; Jørgensen, H. F.; Košler, Jan

doi:10.1016/j.gr.2015.12.006

Cited by 24 publications

(29 citation statements)

References 76 publications

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“…These data sit along an average crustal evolution trend together with those from the 550 Ma-old zircons, corresponding to Hf model ages comprised between 1.0 and 1.5 Ga, in agreement with Hf and Nd isotope data from the FMC granitoids Pin and Duthou, 1990;Turpin et al, 1990). Such model ages clearly have no geological significance as zircon in all Gondwana derived sediments throughout Europe provide no evidence for magmatism during this period (Balintoni et al, 2014;Díez Fernández et al, 2012;Drost et al, 2011;Gebauer et al, 1989;Gerdes and Zeh, 2006;Linnemann et al, 2014;Morag et al, 2011a;Pastor-Galán et al, 2013;Pereira et al, 2012a;2012b;Shaw et al, 2014;Sirevaag et al, 2016;Villaseca et al, 2016;Williams et al, 2012;Zeh and Gerdes, 2010). Instead, this Hf isotope signature would correspond again to a mixed source consisting of Neoproterozoic (0.6-0.8 Ga), juvenile crust and Archean/Paleoproterozoic crust (2.0-3.3 Ga).…”

Section: Accepted Manuscriptsupporting

confidence: 76%

“…This interpretation is supported (1) by sedimentologic, paleontogical and paleomagnetic data indicating a common south polar position of all these terranes (Cocks and Torsvik, 2002;Fortey and Cocks, 2003;Paris and Robardet, 1990;Robardet et al, 1990;Tait et al, 2000;, and (2) by detrital zircons from late Proterozoic to early Paleozoic metasediments sampled throughout the European Variscides characterized by a predominance of ages related to the Pan-African orogenies (that resulted in the amalgamation of Gondawana; 0.55-0.70 Ga) and the African cratons (1.9-2.1 Ga and 2.7-3.3 Ga) with a characteristic gap between ca. 1.2 and 1.7 Ga (e.g., Drost et al, 2011;Fernández-Suárez and Gutiérrez-Alonso, 2000;Gebauer et al, 1989;Gerdes and Zeh, 2006;Keay and Lister, 2002;Linnemann et al, 2014;Melleton et al, 2010;Shaw et al, 2014;Sirevaag et al, 2016;Zeh and Gerdes, 2010).…”

Section: Paleogeographic Positionmentioning

confidence: 99%

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Pre-Cadomian to late-Variscan odyssey of the eastern Massif Central, France: Formation of the West European crust in a nutshell

Chelle-Michou¹

2017

Preprint

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The East Massif Central (EMC), France, is part of the internal zone of the Variscan belt where late Carboniferous crustal melting and orogenic collapse have largely obliterated the pre-to early-Variscan geological record. Nevertheless, parts of this history can be reconstructed by using in-situ U-Th-Pb-Lu-Hf isotopic data of texturally well-defined zircon grains from different lithological units. All the main rock units commonly described in the EMC are present in the area of Tournon and include meta-sedimentary and meta-igneous rocks of the Upper Gneiss Unit (UGU) and of the Lower Gneiss Unit (LGU), as well as cross-cuttingVariscan granitoid dikes and a heterogeneous granite coring the major Velay dome. Herein we demonstrate that the UGU and the LGU have markedly distinct zircon records. The results of this study are consistent with deposition of the protoliths of the paragneisses within a backarc basin that was located adjacent to the Arabian-Nubian shield and/or the Saharan Metacraton during the late Ediacaran and collected detritus from the Gondwana continent. At ~545 Ma some of these sedimentary rocks were affected by a first melting event that formed the protoliths of the LGU orthogneisses, those of which subsequently remelted at ca. 308 Ma to form the Velay granite-migmatite dome. Protoliths of the UGU result mainly from a bimodal rift-related magmatism at ~480 Ma, corresponding to melting of the Ediacaran sediments and depleted mantle. Zircon rims from the UGU additionally provide evidence for a metamorphic/migmatitic overprint during the Lower Carboniferous (~350-340 Ma).Finally, several generations of granite dikes of which inherited zircons display characteristics of both the UGU and the LGU were protractedly emplaced from ~322 Ma to ~308 Ma, the youngest of which being coeval with the formation of the Velay dome. Our data further show that the vast majority of crustal material ultimately involved in the Variscan orogeny, which forms the present-day basement in the EMC, was derived from a sedimentary mixture of ACCEPTED MANUSCRIPTA C C E P T E D M A N U S C R I P T various components from the Gondwana continent deposited in Ediacaran times, with no evidence for the involvement of an older autochthonous crust.

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Section: Accepted Manuscriptsupporting

confidence: 76%

Section: Paleogeographic Positionmentioning

confidence: 99%

Pre-Cadomian to late-Variscan odyssey of the eastern Massif Central, France: Formation of the West European crust in a nutshell

Chelle-Michou¹

2017

Preprint

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“…The largest age peak with over a quarter of all ages is of Ordovician age, ca. 480 Ma, and most likely relates to voluminous Ordovician felsic magmatism at the active northern Gondwana margin 10 , 17 . The Neoproterozoic to Archean ages correlates to an African heritage and times when Adria had a peri-Gondwana position.…”

Section: Samples and Methodsmentioning

confidence: 99%

“…1 ). The tectono-stratigraphically lowermost schist complex represents the Paleozoic basement of the Adria plate margin, being characterized by detrital zircons with African provenance 10 . Complexes II and III derive from the western (Tuscan) continental margin of Adria, whilst complexes IV and V represent Ligurian oceanic units from the Alpine Tethys 9 , 11 .…”

Section: Elba Island – Tectonic Settingmentioning

confidence: 99%

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Alps to Apennines zircon roller coaster along the Adria microplate margin

Jacobs

Paoli

Rocchi

et al. 2018

Sci Rep

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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.

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Towards a Southern European Tethyan Palaeomargin provenance signature: sandstone detrital modes and detrital zircon U–Pb age distribution of the Upper Cretaceous–Paleocene Monte Bignone Sandstones (Ligurian Alps, NW Italy)

Mueller

Langone

Patacci

et al. 2019

Int J Earth Sci (Geol Rundsch)

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From Gondwana to Europe: The journey of Elba Island (Italy) as recorded by U–Pb detrital zircon ages of Paleozoic metasedimentary rocks

Cited by 24 publications

References 76 publications

Pre-Cadomian to late-Variscan odyssey of the eastern Massif Central, France: Formation of the West European crust in a nutshell

Pre-Cadomian to late-Variscan odyssey of the eastern Massif Central, France: Formation of the West European crust in a nutshell

Alps to Apennines zircon roller coaster along the Adria microplate margin

Towards a Southern European Tethyan Palaeomargin provenance signature: sandstone detrital modes and detrital zircon U–Pb age distribution of the Upper Cretaceous–Paleocene Monte Bignone Sandstones (Ligurian Alps, NW Italy)

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