Deep structure of the North Tyrrhenian Sea from multi-channel seismic profiles and on land wide angle reflection/refraction seismic recording (LISA cruise): Geodynamical implications

Contrucci, Isabelle; Mauffret, A.; Brunet, Christophe; Nercessian, A.; Béthoux, Nicole; Ferrandini, Jean

doi:10.1016/j.tecto.2005.05.015

Cited by 28 publications

(23 citation statements)

References 32 publications

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“…Other fault orientations after Mauffret et al [1999]. The black line (LISA-10) marks the location of a previous refraction experiment after Contrucci et al [2005]. Red dotted areas mark locations of high magnetic anomalies larger 120 nT (reduced to pole).…”

Section: Tectonic Framework and Bathymetric Featuresmentioning

confidence: 99%

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Early‐stage rifting of the northern Tyrrhenian Sea Basin: Results from a combined wide‐angle and multichannel seismic study

Moeller

Grevemeyer

Ranero

et al. 2013

Geochem Geophys Geosyst

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[1] Extension of the continental lithosphere leads to the formation of rift basins and ultimately may create passive continental margins. The mechanisms that operate during the early stage of crustal extension are still intensely debated. We present the results from coincident multichannel seismic and wide-angle seismic profiles that transect across the northern Tyrrhenian Sea Basin. The profiles cross the Corsica Basin (France) to the Latium Margin (Italy) where the early-rift stage of the basin is well preserved. We found two domains, each with a distinct tectonic style, heat flow and crustal thickness. One domain is the Corsica Basin in the west that formed before the main rift phase of the northern Tyrrhenian Sea opening ($8-4 Ma). The second domain is rifted continental crust characterized by tilted blocks and half-graben structures in the central region and at the Latium Margin. These two domains are separated by a deep ($10 km) sedimentary complex of the eastern portion of the Corsica Basin. Travel-time tomography of wide-angle seismic data reveals the crustal architecture and a subhorizontal 15-17 6 1 km deep Moho discontinuity under the basin. To estimate the amount of horizontal extension we have identified the pre-, syn-, and post-tectonic sedimentary units and calculated the relative displacement of faults. We found that major faults initiated at angles of 45 -50 and that the rifted domain is horizontally stretched by a factor of $ 1.3 ($8-10 mm/a). The crust has been thinned from $24 to $17 km indicating a similar amount of extension ($30%). The transect represents one of the best imaged early rifts and implies that the formation of crustal-scale detachments, or long-lived low-angle normal faults, is not a general feature that controls the rift initiation of continental crust. Other young rift basins, like the Gulf of Corinth, the Suez Rift or Lake Baikal, display features resembling the northern Tyrrhenian Basin, suggesting that half-graben formations and distributed homogeneous crustal thinning are a common feature during rift initiation.

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Section: Tectonic Framework and Bathymetric Featuresmentioning

confidence: 99%

“…Contrucci et al [2005] modeled marine shots recorded on land $50 km north of the profile (line LISA-10 in Figure 1). They found a 15 km thick crust under the Corsica Basin and a 23-25 km thick crust between Pianosa Ridge and the Tuscany Margin.…”

Section: Crustal Structure and Thinningmentioning

confidence: 99%

Early‐stage rifting of the northern Tyrrhenian Sea Basin: Results from a combined wide‐angle and multichannel seismic study

Moeller

Grevemeyer

Ranero

et al. 2013

Geochem Geophys Geosyst

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“…Most authors suppose that convergent and collisional stages (Cretaceous-Early Miocene) and commercial seismic profiles (lines AM1-7, SIF9-11, Bag1-6, Pia 13-22, RA1-2) are shown. The locations of the seismic profiles are from Orlando et al (1994), Bonini and Sani (2002), Brogi et al (2005a) Int J Earth Sci (Geol Rundsch) (2008) 97:677-703 679 determined the east-verging structural emplacement of the tectonic units (Late Triassic-Early Miocene), and a subsequent extensional stage (Middle Miocene-Present) produced the collapse of the overthickened crust (Jolivet et al 1990;Bertini et al 1991;Carmignani et al 1994;Baldi et al 1995;Boncio et al 1998;Barchi et al 1998;Liotta et al 1998;Brogi et al 2003;Lavecchia et al 2004;Contrucci et al 2005). The extensional stage produced the thinning of the continental crust and lithosphere to about 20-22 and 30-50 km respectively (Panza et al 1980;Ponziani et al 1994;Decandia et al 1998;Lavecchia et al 2004), as well as Neogene magmatism (Serri et al 1993;Acocella and Rossetti 2002;Rossetti et al 1998Rossetti et al , 1999Peccerillo et al 2001;Dini et al 2005) and rapid surface uplift (Dallmeyer et al 1995;Dallmeyer and Liotta 1998).…”

Section: Tectonic and Stratigraphic Settingmentioning

confidence: 99%

The structure of the Monte Amiata volcano-geothermal area (Northern Apennines, Italy): Neogene-Quaternary compression versus extension

Brogi

2007

Int J Earth Sci (Geol Rundsch)

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“…South of this area extensional processes related to the Apenninic subduction produced the opening of the Liguro-Provençal basin (Oligocene-Early Miocene) and the Tyrrhenian sea (from Middle Miocene onward) (Patacca and Scandone 1989;Patacca et al 1992;Doglioni 1991;Doglioni et al 1999;Makris et al 1999;Séranne 1999;Faccenna et al 2001;Rollet et al 2002;Faccenna et al 2004;Rosenbaum and Lister 2004;Contrucci et al 2005;Schettino and Turco 2006).…”

Section: Introductionmentioning

confidence: 99%

Orogenic processes and the Corsica/Apennines geodynamic evolution: insights from Taiwan

Molli

Malavieille

2010

Int J Earth Sci (Geol Rundsch)

117

136

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International audienceThe Alps/Apennines system, as well as many collisional orogens through the world, shows a finite deformation produced during a long geological history which involves numerous superimposed tectonic events. As a result, complex and often contrasted reconstructions for the setting and tectonics of the different stages of the growing and interfering Alps/Apennines system have been proposed. To enlight some of the geometric and kinematic signatures related to past geodynamics in the composite Alps(Corsica)/Apennines system, we analyse the major deformation processes, their superimposition, and resulting finite structural geometries in the currently growing Taiwan orogenic system. The Taiwan island and its offshore northward and southward prolongations represent the emerged and the sub-marine parts of an orogenic wedge related to the interactions between the Eurasian and the Philippine Sea and recording different subduction settings. Using the Taiwan actualistic geodynamic scenarios and the related first-order geometric-kinematic constraints, we will attempt a reconstruction of the tectonic evolution for the Corsica/Apennines orogenic system foregrounding the key role of continental subduction and subduction reversal during such evolution

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Deep structure of the North Tyrrhenian Sea from multi-channel seismic profiles and on land wide angle reflection/refraction seismic recording (LISA cruise): Geodynamical implications

Cited by 28 publications

References 32 publications

Early‐stage rifting of the northern Tyrrhenian Sea Basin: Results from a combined wide‐angle and multichannel seismic study

Early‐stage rifting of the northern Tyrrhenian Sea Basin: Results from a combined wide‐angle and multichannel seismic study

The structure of the Monte Amiata volcano-geothermal area (Northern Apennines, Italy): Neogene-Quaternary compression versus extension

Orogenic processes and the Corsica/Apennines geodynamic evolution: insights from Taiwan

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