Petrogenesis of Early Permian olivine-bearing cumulates and associated basalt dykes from Bocca di Tenda (Northern Corsica): Implications for post-collisional Variscan evolution

Tribuzio, R.; Renna, Maria Rosaria; Braga, Roberto; Dallai, Luigi

doi:10.1016/j.chemgeo.2008.10.045

Cited by 23 publications

(12 citation statements)

References 64 publications

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“…These rocks were already residing at upper crustal level prior to Mesozoic rifting. Only a few Permian gabbros intruded in the pre-rift upper crustal levels [Bocca di Tenda gabbros (Table 1, Tribuzio et al 2009)]. More commonly, the late-Carboniferous to early-Permian upper crustal intrusions are felsic and led to the formation of granitoid bodies (Pinarelli et al 1988;von Quadt et al 1994;Boriani et al 1995;Vavra et al 1999;Bertrand et al 2005) which are related to acidic to intermediate volcanism at the surface (e.g.…”

Section: Continental Crustmentioning

confidence: 95%

Unravelling the interaction between tectonic and sedimentary processes during lithospheric thinning in the Alpine Tethys margins

Mohn

Manatschal

Müntener

et al. 2010

Int J Earth Sci (Geol Rundsch)

161

163

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The discovery of exhumed continental mantle and hyper-extended crust in present-day magma-poor rifted margins is at the origin of a paradigm shift within the research field of deep-water rifted margins. It opened new questions about the strain history of rifted margins and the nature and composition of sedimentary, crustal and mantle rocks in rifted margins. Thanks to the benefit of more than one century of work in the Alps and access to world-class outcrops preserving the primary relationships between sediments and crustal and mantle rocks from the fossil Alpine Tethys margins, it is possible to link the subsidence history and syn-rift sedimentary evolution with the strain distribution observed in the crust and mantle rocks exposed in the distal rifted margins. In this paper, we will focus on the transition from early to late rifting that is associated with considerable crustal thinning and a reorganization of the rift system. Crustal thinning is at the origin of a major change in the style of deformation from high-angle to lowangle normal faulting which controls basin-architecture, sedimentary sources and processes and the nature of basement rocks exhumed along the detachment faults in the distal margin. Stratigraphic and isotopic ages indicate that this major change occurred in late Sinemurian time, involving a shift of the syn-rift sedimentation toward the distal domain associated with a major reorganization of the crustal structure with exhumation of lower and middle crust. These changes may be triggered by mantle processes, as indicated by the infiltration of MOR-type magmas in the lithospheric mantle, and the uplift of the Briançonnais domain. Thinning and exhumation of the crust and lithosphere also resulted in the creation of new paleogeographic domains, the Proto Valais and Liguria-Piemonte domains. These basins show a complex, 3D temporal and spatial evolution that might have evolved, at least in the case of the Liguria-Piemonte basin, in the formation of an embryonic oceanic crust. The re-interpretation of the rift evolution and the architecture of the distal rifted margins in the Alps have important implications for the understanding of rifted margins worldwide, but also for the paleogeographic reconstruction of the Alpine domain and its subsequent Alpine compressional overprint.

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Section: Continental Crustmentioning

confidence: 95%

Unravelling the interaction between tectonic and sedimentary processes during lithospheric thinning in the Alpine Tethys margins

Mohn

Manatschal

Müntener

et al. 2010

Int J Earth Sci (Geol Rundsch)

161

163

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“…The geochemical compositions of the U2 and U3 complexes are discussed using recently published datasets (Barbey et al, 2008;Casini et al, 2012;Cocherie et al, 1994;Di Vincenzo et al, 1996;Poitrasson et al, 1995Poitrasson et al, , 1998Poli and Tommasini, 1991;Poli et al, 1989;Renna et al, 2006Renna et al, , 2007Secchi et al, 1991;Tommasini and Poli, 1992;Tribuzio et al, 2009). U2 granites are generally felsic rocks characterized by SiO 2 contents ranging from 53.56 to 77.14 wt.% (Fig.…”

Section: Geochemistry: the Compositions Of U2 And U3 Magmasmentioning

confidence: 99%

Evolution of the Corsica–Sardinia Batholith and late-orogenic shearing of the Variscides

et al. 2015

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“…An increasing number of studies presents strong evidences for a Permian magmatic and metamorphic event that can be observed throughout large parts of Western Europe. In the Alpine belt, a thinning of the lithosphere is attested by the isotopic signature of mantle rocks indicating Permian partial melting (Rampone et al 1998;Müntener et al 2004;McCarthy and Müntener 2015), accretion of underplated magmatic bodies (Voshage et al 1987;Libourel 1988;Vielzeuf and Pin 1991;Hermann et al 1997) and mid-to upper-crustal mafic intrusion (Tribuzio et al 1999;Monjoie et al 2007;Tribuzio et al 2009;Petri et al 2016). Synchronously, the lithospheric thinning combined with widespread mafic magmatism was responsible for HT metamorphism ranging from greenschist to granulite facies (Schuster and Stüwe 2008).…”

Section: Geodynamic Implicationsmentioning

confidence: 99%

U–Pb geochronology of the Sondalo gabbroic complex (Central Alps) and its position within the Permian post-Variscan extension

Petri

Mohn

Skrzypek

et al. 2017

Int J Earth Sci (Geol Rundsch)

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Petrogenesis of Early Permian olivine-bearing cumulates and associated basalt dykes from Bocca di Tenda (Northern Corsica): Implications for post-collisional Variscan evolution

Cited by 23 publications

References 64 publications

Unravelling the interaction between tectonic and sedimentary processes during lithospheric thinning in the Alpine Tethys margins

Unravelling the interaction between tectonic and sedimentary processes during lithospheric thinning in the Alpine Tethys margins

Evolution of the Corsica–Sardinia Batholith and late-orogenic shearing of the Variscides

U–Pb geochronology of the Sondalo gabbroic complex (Central Alps) and its position within the Permian post-Variscan extension

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