Fabric Analysis in Upper Crustal Post-Collisional Granitoids from the Serre Batholith (Southern Italy): Results from Microstructural and AMS Investigations
The Serre Batholith in Central Calabria (southern Italy) represents the intermediate portion of a continuous cross-section of late Variscan continental crust. The various granitoid units of the batholith were emplaced at depths between 23 and 6 km through an overaccretion mechanism that, at its uppe...
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2021-10-01
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| author | Patrizia Fiannacca Damiano Russo Eugenio Fazio Rosolino Cirrincione Manish A. Mamtani |
| author_facet | Patrizia Fiannacca Damiano Russo Eugenio Fazio Rosolino Cirrincione Manish A. Mamtani |
| author_sort | Patrizia Fiannacca |
| collection | DOAJ |
| description | The Serre Batholith in Central Calabria (southern Italy) represents the intermediate portion of a continuous cross-section of late Variscan continental crust. The various granitoid units of the batholith were emplaced at depths between 23 and 6 km through an overaccretion mechanism that, at its upper levels, was marked by the emplacement of two-mica granodiorites and granites (MBG) at c. 295 Ma, followed by weakly peraluminous granodiorites (BAG) at c. 292 Ma. These upper crustal granitoid rocks have recorded tectonic stresses, which affected the batholith during cooling of the magmatic bodies, exhibiting a range of deformation microstructures from submagmatic to low-temperature subsolidus conditions, but without developing an evident meso/micro-structural fabric. Anisotropy of magnetic susceptibility (AMS) was employed to identify a possible “internal” fabric of the Serre upper crustal granitoids, revealing a magnetic foliation represented by a mainly oblate AMS ellipsoid. Magnetic foliations and lineations are consistent with a stress field characterized by a shortening axis roughly oriented NW–SE. Further studies are in progress to investigate more in depth the relationships between regional tectonic structures and the emplacement of the late-Variscan Serre Batholith granitoids. |
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| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-03-10T06:32:19Z |
| publishDate | 2021-10-01 |
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| spelling | doaj.art-ff38992cbca94a9db5fee3dca9cfe4362023-11-22T18:23:35ZengMDPI AGGeosciences2076-32632021-10-01111041410.3390/geosciences11100414Fabric Analysis in Upper Crustal Post-Collisional Granitoids from the Serre Batholith (Southern Italy): Results from Microstructural and AMS InvestigationsPatrizia Fiannacca0Damiano Russo1Eugenio Fazio2Rosolino Cirrincione3Manish A. Mamtani4Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Catania, 95129 Catania, ItalyDipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Catania, 95129 Catania, ItalyDipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Catania, 95129 Catania, ItalyDipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Catania, 95129 Catania, ItalyIndian Institute of Technology Kharagpur, Kharagpur 721302, IndiaThe Serre Batholith in Central Calabria (southern Italy) represents the intermediate portion of a continuous cross-section of late Variscan continental crust. The various granitoid units of the batholith were emplaced at depths between 23 and 6 km through an overaccretion mechanism that, at its upper levels, was marked by the emplacement of two-mica granodiorites and granites (MBG) at c. 295 Ma, followed by weakly peraluminous granodiorites (BAG) at c. 292 Ma. These upper crustal granitoid rocks have recorded tectonic stresses, which affected the batholith during cooling of the magmatic bodies, exhibiting a range of deformation microstructures from submagmatic to low-temperature subsolidus conditions, but without developing an evident meso/micro-structural fabric. Anisotropy of magnetic susceptibility (AMS) was employed to identify a possible “internal” fabric of the Serre upper crustal granitoids, revealing a magnetic foliation represented by a mainly oblate AMS ellipsoid. Magnetic foliations and lineations are consistent with a stress field characterized by a shortening axis roughly oriented NW–SE. Further studies are in progress to investigate more in depth the relationships between regional tectonic structures and the emplacement of the late-Variscan Serre Batholith granitoids.https://www.mdpi.com/2076-3263/11/10/414deformation microstructuresshear zoneanisotropy of magnetic susceptibilitySerre MassifCalabria |
| spellingShingle | Patrizia Fiannacca Damiano Russo Eugenio Fazio Rosolino Cirrincione Manish A. Mamtani Fabric Analysis in Upper Crustal Post-Collisional Granitoids from the Serre Batholith (Southern Italy): Results from Microstructural and AMS Investigations Geosciences deformation microstructures shear zone anisotropy of magnetic susceptibility Serre Massif Calabria |
| title | Fabric Analysis in Upper Crustal Post-Collisional Granitoids from the Serre Batholith (Southern Italy): Results from Microstructural and AMS Investigations |
| title_full | Fabric Analysis in Upper Crustal Post-Collisional Granitoids from the Serre Batholith (Southern Italy): Results from Microstructural and AMS Investigations |
| title_fullStr | Fabric Analysis in Upper Crustal Post-Collisional Granitoids from the Serre Batholith (Southern Italy): Results from Microstructural and AMS Investigations |
| title_full_unstemmed | Fabric Analysis in Upper Crustal Post-Collisional Granitoids from the Serre Batholith (Southern Italy): Results from Microstructural and AMS Investigations |
| title_short | Fabric Analysis in Upper Crustal Post-Collisional Granitoids from the Serre Batholith (Southern Italy): Results from Microstructural and AMS Investigations |
| title_sort | fabric analysis in upper crustal post collisional granitoids from the serre batholith southern italy results from microstructural and ams investigations |
| topic | deformation microstructures shear zone anisotropy of magnetic susceptibility Serre Massif Calabria |
| url | https://www.mdpi.com/2076-3263/11/10/414 |
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