Fault-related rocks: deciphering the structural–metamorphic evolution of an accretionary wedge in a collisional belt, NE Sicily

Cirrincione, Rosolino; Fazio, Eugenio; Ortolano, Gaetano; Pezzino, Antonino; Punturo, Rosalda

doi:10.1080/00206814.2011.623022

Cited by 43 publications

(35 citation statements)

References 26 publications

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“…According to this last view, this unit, named the Madonna di Polsi Unit (MPU) by , can be framed within the southern CPO geodynamic scenario as a prevalent metapelite sequence, differently affected by an early Alpine evolution along an HP geothermal gradient (Cirrincione et al, 2008b). As a consequence of this proposed model, the comparison between Aspromonte Massif and Peloritani Mountains nappe-like edifices (Cirrincione et al, 1999;Cirrincione et al, 2012) was facilitated, contributing to our understanding of the location of this orogenic sector in the wider geodynamic puzzle of the western Mediterranean realm (e.g. Critelli et al, 2008;Perrone et al, 2006;Perri et al, 2011Perri et al, , 2013Zaghloul et al, 2010).…”

Section: Geological Settingmentioning

confidence: 96%

Petro-structural geology of the Eastern Aspromonte Massif crystalline basement (southern Italy-Calabria): an example of interoperable geo-data management from thin section – to field scale

et al. 2014

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The presented maps provide an example of the synoptic display of multi-scale geological features characterizing the tectono-metamorphic evolution of the crystalline basement terranes in a poly-orogenic-multistadial evolutionary scenario. The petro-structural map of the eastern Aspromonte Massif (southern Calabrian Peloritani Orogen) is characterized by a nappe-like edifice composed by the superimposition of three crystalline basement tectonic units which, sharing the same Alpine-Apennine reworking, underwent a different metamorphic evolution, mostly derived from the Hercynian orogenic cycle. This geological framework is completed by the suture deposition of a Oligocene-Miocene syn-orogenic clastic formation, partly roofed by the back-thrusting of a clay-rich mélange. In order to understand the potential relationships within the complex dataset deriving from the geological investigations of this crystalline basement area, a geo-database, capable of handling multi-scale information from field-derived structural data (i.e. foliation, lineation, fold-and fault-related structures) to micro-scale derived ones (i.e. thin-section analysis, electron microscope and microprobe investigations, thermodynamic modeling outputs) has been constructed, according to the international standards using the Geo-Scientific Markup Language developed by the Commission for the Management and Application of Geo-science Information. Proposed outputs will show the relationships between field-related geological features, showing collected samples and the subsequent laboratory investigations. These are fundamental to achieving reliable results in geological contexts, such as those for reconstructing the tectono-metamorphic evolution of crystalline basement terrains.

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Section: Geological Settingmentioning

confidence: 96%

Petro-structural geology of the Eastern Aspromonte Massif crystalline basement (southern Italy-Calabria): an example of interoperable geo-data management from thin section – to field scale

et al. 2014

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“…Once again, the case of Erucastrum virgatum is of particular importance. Most species of this genus have a west Mediterranean or central south-west European distribution and many of them are steno-endemics (Gómez-Campo 1982, 1983, 1984, confined to the territories belonging to the Alpine orogeny as outlined by Von Raumer et al (2003) and Cirrincione et al (2012) (Figure 6). For example, Erucastrum rifanum (Emberger & Maire) Gómez-Campo is from Morocco in the Rif; E. palustre (Pirona) Vis is a narrow endemics of NE Italy.…”

Section: Paleogeographic Connectionsmentioning

confidence: 99%

“…In particular, together with the Aspromonte, Serre and Sila Massif (Calabria), they represent a patch of the Alpine orogeny located in the central part of the Mediterranean basin: the so-called Calabrian-Peloritani Arc (Cirrincione et al 2012). The Alpine range exposed in the western Mediterranean area was Figure 1.…”

Section: Study Areamentioning

confidence: 99%

The endemic vascular flora of Peloritani Mountains (NE Sicily): Plant functional traits and phytogeographical relationships in the most isolated and fragmentary micro-plate of the Alpine orogeny

Sciandrello

Guarino

Minissale

et al. 2014

Plant Biosystems - An International Journal Dealing with all As

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This study is aimed at (1) producing a complete and updated inventory of the endemic vascular flora of Peloritani Mountains, (2) defining the geographical limits of Peloritani, regarded here as a biogeographical district and (3) highlighting possible paleogeographic connections with other Mediterranean lands. The heterogeneity analysis of the endemic flora was performed by means of contingency tables, through the x 2 test. The endemic flora of this area consists of 129 specific and infraspecific taxa, of which 15 are restricted to the Peloritani Mountains. The analysis of habitats revealed that endemic taxa are most abundant on cliffs, rangelands, woods and garrigues. A large number of surveyed taxa are endemic to central-southern Italy and Sicily, while the number of endemic taxa in common with Calabria, Etna and Aeolian Islands turned out to be rather low, in spite of the geographical proximity. The endemic flora of Peloritani allows to emphasize palaeogeographical relationships not only with the neighbouring Mediterranean territories, but also with currently remote ones, such as southern Spain, Sardinia and Corsica. The phytogeographical framework substantiates the hypothesis that the Peloritani floristic district coincides with the limit given to Peloritani Mountains by structural geologists.

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“…Because of the localization of intense strain, mylonites are considered to have the potential to record metamorphic conditions of syn‐ to post‐shearing (i.e. retrogression) events (Cirrincione, Fazio, Ortolano, Pezzino, & Punturo, ). Associated studies on adjacent less deformed/undeformed portions of wall rocks may provide hints on the pre‐shearing metamorphic history.…”

Section: Discussionmentioning

confidence: 99%

High‐P tectono‐metamorphic evolution of mylonites from the Variscan basement of the Northern Apennines, Italy

Pò

Braga

Massonne

et al. 2017

Journal Metamorphic Geology

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Strain localization within shear zones may partially erase the rock fabric and the metamorphic assemblage(s) that had developed before the mylonitic event. In poly-deformed basements, the loss of information on pre-kinematic phases of mylonites hinders large-scale correlations based on tectono-metamorphic data. In this study, devoted to a relict unit of Variscan basement reworked within the nappe stack of the Northern Apennines (Italy), we investigate the possibility to reconstruct a complete pressure (P)-temperature (T)-deformation (D) path of mylonitic micaschist and amphibolite by integrating microstructural analysis, mineral chemistry and thermodynamic modelling. The micaschist is characterized by a mylonitic fabric with fine-grained K-white mica and chlorite enveloping micafishes, quartz, and garnet pseudomorphs. Potassic white mica shows Mg-rich cores and Mg-poor rims. The amphibolite contains green amphibole+plagio-clase+garnet+quartz+ilmenite defining S 1 with a superposed mylonitic fabric localized in decimetre-to centimetre-scale shear zones. Garnet is surrounded by an amphibole+plagioclase corona. Phase diagram calculations provide P-T constraints that are linked to the reconstructed metamorphic-deformational stages. For the first time an early high-P stage at >11 kbar and 510°C was constrained, followed by a temperature peak at 550-590°C and 9-10 kbar and a retrograde stage (<475°C, <7 kbar), during which ductile shear zones developed. The inferred clockwise P-T-D path was most likely related to crustal thickening by continentcontinent collision during the Variscan orogeny. A comparison of this P-T-D path with those of other Variscan basement occurrences in the Northern Apennines revealed significant differences. Conversely, a correlation between the tectono-metamorphic evolution of the Variscan basement at Cerreto pass, NE Sardinia and Ligurian Alps was established. K E Y W O R D SHigh-P metamorphism, mylonite, Northern Apennines, P-T-D path, Variscan orogeny

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Fault-related rocks: deciphering the structural–metamorphic evolution of an accretionary wedge in a collisional belt, NE Sicily

Cited by 43 publications

References 26 publications

Petro-structural geology of the Eastern Aspromonte Massif crystalline basement (southern Italy-Calabria): an example of interoperable geo-data management from thin section – to field scale

Petro-structural geology of the Eastern Aspromonte Massif crystalline basement (southern Italy-Calabria): an example of interoperable geo-data management from thin section – to field scale

The endemic vascular flora of Peloritani Mountains (NE Sicily): Plant functional traits and phytogeographical relationships in the most isolated and fragmentary micro-plate of the Alpine orogeny

High‐P tectono‐metamorphic evolution of mylonites from the Variscan basement of the Northern Apennines, Italy

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