Geodynamic evolution of the central and western Mediterranean: Tectonics vs. igneous petrology constraints

Carminati, Eugenio; Lustrino, Michele; Doglioni, Carlo

doi:10.1016/j.tecto.2012.01.026

Cited by 394 publications

(309 citation statements)

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“…The geological setting and background of the island of Sardinia has been recently reviewed (e.g., Lustrino et al, 2009Lustrino et al, , 2011Carminati et al, 2010Carminati et al, , 2012 and for this reason only the most important aspects will be summarized here. Until the Oligocene, Sardinia and Corsica were part of the southern European paleo-margin.…”

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

“…After a NE-SW striking rifting stage, mostly developed during the Oligocene, a ~55-60° Early Miocene counter-clockwise rotation separated the Sardinia-Corsica block from Europe (~22-15 Ma; Fig. 2; Gattacceca et al, 2007;Carminati et al, 2010Carminati et al, , 2012, and references therein). A branch of this rifting system is now identified in the Sardinian Trough (Fossa Sarda in the Italian literature), a ~220 km-long, ~40 km-wide middle Oligocene-Aquitanian rift system cutting the island from north to south (Lecca et al, 1997;Faccenna et al, 2002;Cherchi et al, 2008;Fig.…”

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

“…The origin of the Oligo-Miocene extensional movements recorded in the western Mediterranean basins has been related to the gravitative sinking of subducted oceanic lithosphere of the Tethyan Ocean (Ionian Sea) subducting north-westward since late Eocene, possibly coupled with an asthenospheric east-directed mantle flow (e.g., Alvarez, 1974;Beccaluva et al, 1989;Gueguen et al, 1998;Carminati et al, 2012). The oldest igneous rocks (~38 Myr; Lustrino et al, 2009;Fig.…”

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

“…Oligocene igneous activity in Sardinia was sporadic, with the bulk of the orogenic igneous activity starting around 28 Ma (Lecca et al, 1997), and peaking during the 22-18 Myr time range (Beccaluva et al, 1985;Speranza et al, 2002;Gattacceca et al, 2007;Carminati et al, 2012, and and very rare basic-ultrabasic exceptions (e.g., basalts and picritic basalts of Montresta and Arcuentu, north-western and south-western Sardinia, respectively; Morra et al, 1997;Brotzu et al, 1997b;Downes et al, 2001;Franciosi et al, 2003;Beccaluva et al, in press). Trace element abundances and isotopic ratios of the less differentiated Late Eocene-Middle Miocene rocks led several authors to propose a derivation from a mantle wedge modified by slab-derived fluids (e.g., Morra et al, 1997;Mattioli et al, 2000;Downes et al, 2001;Franciosi et al, 2003;Lustrino et al, 2009;Conte et al, 2010;Guarino et al, 2011).…”

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

“…1) The island acted as the foreland of the earlier Alpine Orogeny and the hinterland of the Apennine subduction system (e.g., Carminati et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr–Nd–Pb–O–Hf–Os) and petrological view

Lustrino

Fedele

Melluso

et al. 2013

Lithos

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Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr-Nd-Pb-O-Hf-Os) and petrological view, LITHOS (2013), doi: 10.1016/j.lithos.2013.08.022 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

“…1) The island acted as the foreland of the earlier Alpine Orogeny and the hinterland of the Apennine subduction system (e.g., Carminati et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr–Nd–Pb–O–Hf–Os) and petrological view

Lustrino

Fedele

Melluso

et al. 2013

Lithos

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Mantle dynamics in the Mediterranean

et al. 2014

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The Mediterranean offers a unique opportunity to study the driving forces of tectonic deformation within a complex mobile belt. Lithospheric dynamics are affected by slab rollback and collision of two large, slowly moving plates, forcing fragments of continental and oceanic lithosphere to interact. This paper reviews the rich and growing set of constraints from geological reconstructions, geodetic data, and crustal and upper mantle heterogeneity imaged by structural seismology. We proceed to discuss a conceptual and quantitative framework for the causes of surface deformation. Exploring existing and newly developed tectonic and numerical geodynamic models, we illustrate the role of mantle convection on surface geology. A coherent picture emerges which can be outlined by two, almost symmetric, upper mantle convection cells. The downwellings are found in the center of the Mediterranean and are associated with the descent of the Tyrrhenian and the Hellenic slabs. During plate convergence, these slabs migrated backward with respect to the Eurasian upper plate, inducing a return flow of the asthenosphere from the back-arc regions toward the subduction zones. This flow can be found at large distance from the subduction zones and is at present expressed in two upwellings beneath Anatolia and eastern Iberia. This convection system provides an explanation for the general pattern of seismic anisotropy in the Mediterranean, first-order Anatolia, and Adria microplate kinematics and may contribute to the high elevation of scarcely deformed areas such as Anatolia and eastern Iberia. More generally, the Mediterranean is an illustration of how upper mantle, small-scale convection leads to intraplate deformation and complex plate boundary reconfiguration at the westernmost terminus of the Tethyan collision.

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Origin and consequences of western Mediterranean subduction, rollback, and slab segmentation

2014

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The western Mediterranean recorded subduction rollback, slab segmentation and separation.Here we address the questions of what caused Oligocene rollback initiation, and how its subsequent evolution split up an originally coherent fore arc into circum-southwest Mediterranean segments. We kinematically reconstruct western Mediterranean geology from subduction initiation to present, using Atlantic plate reconstructions as boundary condition. We test possible reconstructions against remnants of subducted lithosphere imaged by seismic tomography. Transform motion between Africa and Iberia (including the Baleares) between~120 and 85 Ma was followed by up to 150 km convergence until 30 Ma. Subduction likely initiated along the transform fault that accommodated pre-85 Ma translation. By thẽ 30 Ma inception of rollback, up to 150 km of convergence had formed a small slab below the Baleares. Iberia was disconnected from Sardinia/Calabria through the North Balearic Transform Zone (NBTZ). Subduction below Sardinia/Calabria was slightly faster than below the Baleares, the difference being accommodated in the Pyrenees. A moving triple junction at the trench-NBTZ intersection formed a subduction transform edge propagator fault between the Baleares and Calabria slab segments. Calabria rolled back eastward, whereas the Baleares slab underwent radial (SW-S-SE) rollback. After Kabylides-Africa collision, the western slab segment retreated toward Gibraltar, here reconstructed as the maximum rollback end-member model, and a Kabylides slab detached from Africa. Opening of a slab window below the NBTZ allowed asthenospheric rise to the base of the fore arc creating high-temperature metamorphism. Western Mediterranean rollback commenced only after sufficient slab-pull was created from 100 to 150 km of slow, forced subduction before~30 Ma.

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Geodynamic evolution of the central and western Mediterranean: Tectonics vs. igneous petrology constraints

Cited by 394 publications

References 182 publications

Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr–Nd–Pb–O–Hf–Os) and petrological view

Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr–Nd–Pb–O–Hf–Os) and petrological view

Mantle dynamics in the Mediterranean

Origin and consequences of western Mediterranean subduction, rollback, and slab segmentation

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