39Ar/40Ar dating of high-pressure rocks from the Ligurian Alps: Evidence for a continuous subduction–exhumation cycle

Federico, Laura; Capponi, Giovanni; Crispini, Laura; Scambelluri, Marco; Villa, Igor M.

doi:10.1016/j.epsl.2005.09.062

Cited by 79 publications

(74 citation statements)

References 38 publications

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“…Piccardo's (2013) introduction claims that, after the geologic-petrologic paper by Chiesa et al (1975), three decades of little attention to the geodynamic history of the Voltri Massif followed, which was only recently highlighted by the structural-petrologic papers by Vignaroli et al (2008) and Piccardo (2013). However, over the last two decades, relatively broad, well-accepted geodynamic pictures regarding the evolution of the Voltri meta-ophiolites + Erro-Tobbio have been presented in a number of publications (Hoogerduijng Vissers et al 1991;Hoogerduijn Strating et al 1993;Scambelluri et al 1995;Hermann et al 2000;Brouwer et al 2002Brouwer et al , 2004Capponi and Crispini 2002;Federico et al 2005Federico et al , 2007Federico et al , 2009Rampone et al 2005;Rampone and Borghini 2008;Healy et al 2009;John et al 2011;Kendrick et al 2011).…”

Section: Please Scroll Down For Articlementioning

confidence: 94%

Comments on the paper ‘Subduction of a fossil slow–ultraslow spreading ocean: a petrology-constrained geodynamic model based on the Voltri Massif, Ligurian Alps, NW Italy’ by G. B. Piccardo

Scambelluri

2013

International Geology Review

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Section: Please Scroll Down For Articlementioning

confidence: 94%

Comments on the paper ‘Subduction of a fossil slow–ultraslow spreading ocean: a petrology-constrained geodynamic model based on the Voltri Massif, Ligurian Alps, NW Italy’ by G. B. Piccardo

Scambelluri

2013

International Geology Review

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“…Cortesogno et al 1977). More recently, eclogite rocks from the Beigua serpentinites have been studied by Liou et al (1998) and Federico et al (2005).…”

Section: The Antigorite Serpentinitesmentioning

confidence: 97%

Subduction of a fossil slow–ultraslow spreading ocean: a petrology-constrained geodynamic model based on the Voltri Massif, Ligurian Alps, Northwest Italy

Piccardo

2012

International Geology Review

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Slow-ultraslow spreading oceans are mostly floored by mantle peridotites and are typified by rifted continental margins, where subcontinental lithospheric mantle is preserved. Structural and petrologic investigations of the high-pressure (HP) Alpine Voltri Massif ophiolites, which were derived from the Late Jurassic Ligurian Tethys fossil slow-ultraslow spreading ocean, reveal the fate of the oceanic peridotites/serpentinites during subduction to depths involving eclogite-facies conditions, followed by exhumation.The Ligurian Tethys was formed by continental extension within the Europe-Adria lithosphere and consisted of sea-floor exposed mantle peridotites with an uppermost layer of oceanic serpentinites and of subcontinental lithospheric mantle at the rifted continental margins. Plate convergence caused eastward subduction of the oceanic lithosphere of the Europe plate and the uppermost serpentinite layer of the subducting slab formed an antigorite serpentinite-subduction channel. Sectors of the rather unaltered mantle lithosphere of the Adria extended margin underwent ablative subduction and were detached, embedded, and buried to eclogite-facies conditions within the serpentinite-subduction channel. At such P-T conditions, antigorite serpentinites from the oceanic slab underwent partial HP dehydration (antigorite dewatering and growth of new olivine). Water fluxing from partial dehydration of host serpentinites caused partial HP hydration (growth of Ti-clinohumite and antigorite) of the subducted Adria margin peridotites. The serpentinite-subduction channel (future Beigua serpentinites), acting as a low-viscosity carrier for high-density subducted rocks, allowed rapid exhumation of the almost unaltered Adria peridotites (future Erro-Tobbio peridotites) and their emplacement into the Voltri Massif orogenic edifice. Over in the past 35 years, this unique geologic architecture has allowed us to investigate the pristine structural and compositional mantle features of the subcontinental Erro-Tobbio peridotites and to clarify the main steps of the pre-oceanic extensional, tectonic-magmatic history of the Europe-Adria asthenosphere-lithosphere system, which led to the formation of the Ligurian Tethys.Our present knowledge of the Voltri Massif provides fundamental information for enhanced understanding, from a mantle perspective, of formation, subduction, and exhumation of oceanic and marginal lithosphere of slow-ultraslow spreading oceans.

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“…The basin fill unconformably overlies the collisional stack of tectonic units resulting from the main alpine orogenic deformation phases (Paleocene-Eocene; Federico, Capponi, Crispini, Scambelluri, & Villa, 2005 with references therein). The Oligo-miocene late-alpine/apennine tectonics, related to the Corsica -Sardinia block rotation (e.g.…”

Section: The Tertiary Piedmont Basinmentioning

confidence: 99%

Stratigraphic vs structural contacts in a late orogenic basin: the case of the Tertiary Piedmont Basin in the Sassello area (Ligurian Alps, Italy)

et al. 2015

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This geological map (1:10.000 scale) of the 'Sassello Basin' remnant covers an area of about 33.4 km 2 of Liguria (NW Italy); it highlights the occurrence of two main types of contacts between the sediments of the Tertiary Piedmont Basin and the metamorphic substratum (Voltri Unit): (i) stratigraphic and (ii) structural (thrust or steeply dipping faults). (i) Stratigraphic contacts are represented by the main transgressive surface and the nonconformity between the metamorphic rocks of the substratum and the subaerial deposits. They are locally folded and occur along the steeply dipping short limbs of asymmetric folds related to the late-alpine/ apennine tectonics. (ii) Structural contacts are related to the late-alpine/apennine tectonics (thrust faults) or (mostly) to Plio-Quaternary extensional/transtensional faulting. ARTICLE HISTORY

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39Ar/40Ar dating of high-pressure rocks from the Ligurian Alps: Evidence for a continuous subduction–exhumation cycle

Cited by 79 publications

References 38 publications

Comments on the paper ‘Subduction of a fossil slow–ultraslow spreading ocean: a petrology-constrained geodynamic model based on the Voltri Massif, Ligurian Alps, NW Italy’ by G. B. Piccardo

Comments on the paper ‘Subduction of a fossil slow–ultraslow spreading ocean: a petrology-constrained geodynamic model based on the Voltri Massif, Ligurian Alps, NW Italy’ by G. B. Piccardo

Subduction of a fossil slow–ultraslow spreading ocean: a petrology-constrained geodynamic model based on the Voltri Massif, Ligurian Alps, Northwest Italy

Stratigraphic vs structural contacts in a late orogenic basin: the case of the Tertiary Piedmont Basin in the Sassello area (Ligurian Alps, Italy)

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