Migration of compression and extension in the Tyrrhenian Sea, insights from 40Ar/39Ar ages on micas along a transect from Corsica to Tuscany

Brunet, Christophe; Monié, Patrick; Jolivet, Laurent; Cadet, Jean-Paul

doi:10.1016/s0040-1951(00)00067-6

Cited by 244 publications

(261 citation statements)

References 52 publications

Supporting

Mentioning

236

Contrasting

Unclassified

Order By: Relevance

“…the age of sedimentary deposits that seal all the deformations observed in the units of Schistes Lustrés Complex. The pre-Miocene age of these deformation is also confirmed by radiometric dating available for the Schistes Lustrés Complex, that indicate a progressive exhumation older than 25 ma [19].…”

Section: Exhumation-related Stagesupporting

confidence: 52%

“…This occurrence can be probably explained by the more shallow depth reached by the Lento unit before the inception of extensional tectonics. As described by Fournier et al [12], Jolivet et al [13,18], Daniel et al [20] and Brunet et al [19], the D4 deformations was probably acquired during the Oligocene-Miocene extensional tectonics related to collapse of the orogenic wedge.…”

Section: Exhumation-related Stagementioning

confidence: 71%

“…Both oceanic and continental units are subsequently affected by retrograde metamorphism developed under decreasing pressure in the Middle Eocene to Miocene time span, from 45 to 24 Ma [19]. This metamorphism and the associated deformations are generally referred to exhumation of the Schistes Lustrés complex during the extensional largescale tectonics developed during the collapse of the previous thickened orogenic belt [12,13,18,20,19].…”

Section: Geological Frameworkmentioning

confidence: 99%

“…11), according to available radiometric dating [15,19]. As recognized also in similar units of Western Alps and Northern Apennines, the material accreted to the wedge includes both the ophiolites and the sedimentary covers.…”

Section: Accretion-related Stagementioning

confidence: 99%

See 3 more Smart Citations

Tectono-metamorphic history of the ophiolitic Lento unit (northern Corsica): evidences for the complexity of accretion-exhumation processes in a fossil subduction system

et al. 2007

View full text Add to dashboard Cite

show abstract

Section: Exhumation-related Stagesupporting

confidence: 52%

Section: Exhumation-related Stagementioning

confidence: 71%

Section: Geological Frameworkmentioning

confidence: 99%

Section: Accretion-related Stagementioning

confidence: 99%

See 2 more Smart Citations

Tectono-metamorphic history of the ophiolitic Lento unit (northern Corsica): evidences for the complexity of accretion-exhumation processes in a fossil subduction system

et al. 2007

View full text Add to dashboard Cite

show abstract

“…The convergence continued during the post-Oligocene with the eastward overthrusting of the Ligurian Units (derived from the oceanic domain and its transition to the continental margin) on the detached sedimentary cover of the continental margin (Tuscan Nappe) [16][17][18]. From the Middle Miocene, the structural stacking was affected by extensional processes, related to the development of the Tyrrhenian Sea [19][20][21]. Such processes generated Plio-Pleistocene basins, interpreted by many authors as controlled by longitudinal systems of high angle normal faults, assuming a continuous extensional regime from the Middle Miocene to the Present [21][22][23].…”

Section: Climate Geology and Hydrogeologymentioning

confidence: 99%

Water Isotopes as Environmental Tracers for Conceptual Understanding of Groundwater Flow: An Application for Fractured Aquifer Systems in the “Scansano-Magliano in Toscana” Area (Southern Tuscany, Italy)

Doveri

Mussi

2014

Water

View full text Add to dashboard Cite

Abstract:The "Scansano-Magliano in Toscana" area is characterized by a morpho-structure chiefly made-up by sandstone and shelly-calcareous lithologies. Generally, these complexes host minor aquifers in Tuscany, since they have medium to medium-low permeability. In the area under examination, a sandstone outcrop develops with continuity along the ridge of the structure for several kilometers and above a shelly substratum. Consequently, this hydrostructural context suggested the possibility that a significant groundwater body was hosted in the sandstones. In order to verify this assumption, an isotopic study was carried out taking into account several wells and springs sited on the sandstone outcrop and its surrounding area; the samples collected over a period of two years were analyzed to obtain δ 18 O‰, δ 2 H‰ and 3 H. A study of the hydrostructural and morphological condition was also performed, and minor springs were selected. The analyses of this spring-water resulted in the characterization of the isotopic features of the infiltration water in the studied area, which represents a fundamental base of work for the interpretation of the data of groundwater points which drain long flow paths. By means of this approach, the groundwater framework was defined and the presence of a significant and continuous groundwater body within the sandstone complex was verified. A preliminary conceptual hydrogeological model was also proposed.

show abstract

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

2014

View full text Add to dashboard Cite

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.

show abstract

Migration of compression and extension in the Tyrrhenian Sea, insights from 40Ar/39Ar ages on micas along a transect from Corsica to Tuscany

Cited by 244 publications

References 52 publications

Tectono-metamorphic history of the ophiolitic Lento unit (northern Corsica): evidences for the complexity of accretion-exhumation processes in a fossil subduction system

Tectono-metamorphic history of the ophiolitic Lento unit (northern Corsica): evidences for the complexity of accretion-exhumation processes in a fossil subduction system

Water Isotopes as Environmental Tracers for Conceptual Understanding of Groundwater Flow: An Application for Fractured Aquifer Systems in the “Scansano-Magliano in Toscana” Area (Southern Tuscany, Italy)

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

Contact Info

Product

Resources

About