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English— Clockwise P-T-(t) trajectories are generally recorded in the pre-Triassic basement rocks of the Calabria-Peloritani segment of the Alpine chain. Geochronological data point to a synchronism of T-peak and emplacement of huge masses of granitoids at about 300 Ma. Decompression and heat supply from the granitic intrusions mark the transition from Barrovian to low P/high T metamorphism. When the preserved characters allow to trace prograde trajectories, a strong Pincrease and a moderate T increase, sometimes with T peak delayed relatively to the P peak. These features are consistent with orogenic evolution in which crustal thickening in early-middle-Hercynian contractional stages was followed by crustal thinning in late-Hercynian extensional stages. Moreover, in the Calabria-Peloritani segment of the Alpine chain, pre-Hercynian metamorphic and magmatic evidence also occurs.
| Titolo: | Pre-Triassic history recorded in the Calabria-Peloritani segment of the Alpine chain, southern Italy. An overview. | |
| Autore/i: | V. Festa; A. Messina; A. Paglionico; G. Piccarreta; ROTTURA, ALESSANDRO | |
| Autore/i Unibo: | ||
| Anno: | 2004 | |
| Rivista: | ||
| Abstract: | — Clockwise P-T-(t) trajectories are generally recorded in the pre-Triassic basement rocks of the Calabria-Peloritani segment of the Alpine chain. Geochronological data point to a synchronism of T-peak and emplacement of huge masses of granitoids at about 300 Ma. Decompression and heat supply from the granitic intrusions mark the transition from Barrovian to low P/high T metamorphism. When the preserved characters allow to trace prograde trajectories, a strong Pincrease and a moderate T increase, sometimes with T peak delayed relatively to the P peak. These features are consistent with orogenic evolution in which crustal thickening in early-middle-Hercynian contractional stages was followed by crustal thinning in late-Hercynian extensional stages. Moreover, in the Calabria-Peloritani segment of the Alpine chain, pre-Hercynian metamorphic and magmatic evidence also occurs. | |
| Data prodotto definitivo in UGOV: | 2005-09-28 17:33:22 | |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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http://hdl.handle.net/11585/7451
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