Crustal-scale strain partitioning: footwall deformation below the Alpine Oligo-Miocene detachment of Corsica

Daniel, Jean‐Marc; Jolivet, Laurent; Goffé, Bruno; Poinssot, Christophe

doi:10.1016/0191-8141(95)00075-o

Cited by 85 publications

(140 citation statements)

References 42 publications

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“…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: 70%

“…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%

“…The relationships between the Tenda Massif and the UO units is represented by a shear zone interpreted as a low-angle detachment fault developed during the Tertiary collapse of the orogenic wedge [13,20,25].…”

Section: Geology Of the Golo Valleymentioning

confidence: 99%

“…In the northern sectors (Cap Corse area) these lineations show E-W trend, orthogonal to the belt direction [72,6,7], although in different zones (Punta di Canelle) N-S lineations have been recognized [6,7]. In the southern sectors (Castagniccia area) these lineations show quite scattered trends, even if a N-S trend seems to be prevailing [73,20]. This differences in strike of the L1 lineations recognized along the Schistes Lustrès complex has been generally interpreted as the result of the subsequent deformations, able to produce a sharp reorientation of the preexisting structures [e.g.…”

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

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Section: Exhumation-related Stagementioning

confidence: 70%

Section: Geological Frameworkmentioning

confidence: 99%

Section: Geology Of the Golo Valleymentioning

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

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“…The Schistes lustrés complex was also affected in 45 to 25 Ma time by retrograde metamorphism under decreasing pressure (Maluski 1977;Brunet et al 2000). The retrograde metamorphism, connected with east-vergent deformation, is regarded as connected with the exhumation of HP/LT metamorphic rocks related to the collapse of the previously thickened orogenic belt Jolivet et al 1991Jolivet et al , 1998Daniel et al 1996;Brunet et al 2000).…”

Section: Geological Settingmentioning

confidence: 99%

Deformation history of the ophiolite sequence from the Balagne Nappe, northern Corsica: insights in the tectonic evolution of Alpine Corsica

Marroni

Pandolfi

2003

Geological Journal

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In Alpine Corsica, the Jurassic ophiolites represent remnants of oceanic lithosphere belonging to the Ligure-Piemontese Basin located between the Europe/Corsica and Adria continental margins. In the Balagne area, a Jurassic ophiolitic sequence topped by a Late Jurassic-Late Cretaceous sedimentary cover crops out at the top of the nappe pile. The whole ophiolitic succession is affected by polyphase deformation developed under very low-grade orogenic metamorphic conditions. The original palaeogeographic location and the emplacement mechanisms for the Balagne ophiolites are still a matter of debate and different interpretations for its history have been proposed. The deformation features of the Balagne ophiolites are outlined in order to provide constraints on their history in the framework of the geodynamic evolution of Alpine Corsica. The deformation history reconstructed for the Balagne Nappe includes five different deformation phases, from D1 to D5. The D1 phase was connected with the latest Cretaceous/Palaeocene accretion into the accretionary wedge related to an east-dipping subduction zone followed by a Late Eocene D2 phase related to emplacement onto the Europe/Corsica continental margin. The subsequent D3 phase was characterized by sinistral strike-slip faults and related deformations of Late Eocene-Early Oligocene age. The D4 and D5 phases were developed during the Early Oligocene-Late Miocene extensional processes connected with the collapse of the Alpine belt.

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Feedback between fluid infiltration and rheology along a regional ductile-to-brittle shear zone: The East Tenda Shear Zone (Alpine Corsica)

et al. 2014

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The East Tenda Shear Zone (ETSZ) is the major Alpine tectonic boundary marking the overthrusting of the ocean-derived Schistes Lustrés nappe onto the Variscan crystalline basement of Corsica. New structural, mineralogical, and geochemical investigations along a transect ranging from the Variscan basement to the contact with the Schistes Lustrés are used to construct a rheological model for the ETSZ during its polyphase deformation history. The progressive transformation of the isotropic granitoid protolith into gneisses, shear zones, and, locally, phyllonites is described. The textural/mineralogical change suggests a concurrent increasing metasomatism associated with structurally controlled fluid flow. The effect of such textural/mineralogical evolution on the bulk rheology of the ETSZ is estimated. Rheological flow laws are obtained using an averaging procedure based on the integration of single-phase rheological behavior. The flow laws are used to infer strain rates and construct strength envelopes for each structural domain during progressive deformation, which highlight the relative rheological differences of the main textural components of the ETSZ and the variations in their brittle/ductile transition depths. Two competing processes are inferred. On the one hand, the combined effects of the feldspar-to-mica reaction and the development of a strong planar fabric induce weakening and strain localization along shear zones. On the other hand, fluid channeling along these shear zones enhances alkali feldspar neoblastesis, inducing strain hardening. Among the possible consequences of such feedback processes between strain localization and fluid-rock interaction are episodes of rheological transitions from ductile to brittle behavior during the polyphase tectonic evolution of the ETSZ.

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Crustal-scale strain partitioning: footwall deformation below the Alpine Oligo-Miocene detachment of Corsica

Cited by 85 publications

References 42 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

Deformation history of the ophiolite sequence from the Balagne Nappe, northern Corsica: insights in the tectonic evolution of Alpine Corsica

Feedback between fluid infiltration and rheology along a regional ductile-to-brittle shear zone: The East Tenda Shear Zone (Alpine Corsica)

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