The Middle to Late Jurassic,high-pressure metamorphic ophiolites of Inzecca Unit are well exposed in the Noceta-Vezzani area of Alpine Corsica.These metaophiolites were studied by using a multidisciplinary approach to...The Middle to Late Jurassic,high-pressure metamorphic ophiolites of Inzecca Unit are well exposed in the Noceta-Vezzani area of Alpine Corsica.These metaophiolites were studied by using a multidisciplinary approach to reconstruct the architecture of the oceanic sector from which they derived.The collected data indicate that this oceanic crust consists of a mantle metaperidotites and metaophicalcites,both covered by massive or pillow metabasalts with or without a layer of ophiolite-bearing metabreccias.展开更多
The Northern Apennine orogenic belt developed during subduction and collision between the Europe and Adria plates.The northernnmost sector of the nappe pile is dissected by several tectonic lines,whose kinematics and ...The Northern Apennine orogenic belt developed during subduction and collision between the Europe and Adria plates.The northernnmost sector of the nappe pile is dissected by several tectonic lines,whose kinematics and age are crucial for the understanding of the Northern Apennine evolution,and its mutual relationships with the neighbouring Alps.Between these,the Ottone-Levanto line still lacks an unambiguous geodynamic interpretation,because of lacking of well-exposed outcrops.We describe unique fault rocks exposures representative of the Ottone-Levanto line whose structural features indicate deformation with components of contraction through top-to-the-NE thrusting and contemporaneous top-tothe-SW sinistral/dip-slip shearing.The collected data coupled with regional and map-scale evidences indicate that the Ottone-Levanto line acted as a sinistral transpressional shear zone during the Late Eocene-Early Oligocene.Placing our data in the regional context allows correlating the Ottone-Levanto line with surrounding lines dissecting the Alpine-Apennine junction.We propose that the Ottone-Levanto developed in a conjugate system during collision and northward displacement of the Adria plate,resulting in east-and westward thrusting of the Alpine-Apennines orogenic core.展开更多
基金supported by PRIN 2020 project(Resp.Michele Marroni)Claudia D’Oriano(INGV)Matteo Masotta and Danis Filimon(Earth Science Dept)are also thanked for analytical support in the laboratoriesThis work benefited from the PRA 2022 project handled by Francesca Meneghini.
文摘The Middle to Late Jurassic,high-pressure metamorphic ophiolites of Inzecca Unit are well exposed in the Noceta-Vezzani area of Alpine Corsica.These metaophiolites were studied by using a multidisciplinary approach to reconstruct the architecture of the oceanic sector from which they derived.The collected data indicate that this oceanic crust consists of a mantle metaperidotites and metaophicalcites,both covered by massive or pillow metabasalts with or without a layer of ophiolite-bearing metabreccias.
基金supported by funds ATENEO grant by Pisa University,and by C.N.R(Istituto di Geoscienze e Georisorse,Unita Operativa di Pisa).
文摘The Northern Apennine orogenic belt developed during subduction and collision between the Europe and Adria plates.The northernnmost sector of the nappe pile is dissected by several tectonic lines,whose kinematics and age are crucial for the understanding of the Northern Apennine evolution,and its mutual relationships with the neighbouring Alps.Between these,the Ottone-Levanto line still lacks an unambiguous geodynamic interpretation,because of lacking of well-exposed outcrops.We describe unique fault rocks exposures representative of the Ottone-Levanto line whose structural features indicate deformation with components of contraction through top-to-the-NE thrusting and contemporaneous top-tothe-SW sinistral/dip-slip shearing.The collected data coupled with regional and map-scale evidences indicate that the Ottone-Levanto line acted as a sinistral transpressional shear zone during the Late Eocene-Early Oligocene.Placing our data in the regional context allows correlating the Ottone-Levanto line with surrounding lines dissecting the Alpine-Apennine junction.We propose that the Ottone-Levanto developed in a conjugate system during collision and northward displacement of the Adria plate,resulting in east-and westward thrusting of the Alpine-Apennines orogenic core.
