Cenozoic Volcanism in the Tyrrhenian Sea Region by Angelo Peccerillo

By Angelo Peccerillo

This is an up-to-date variation of the publication via an analogous writer: "Plio-Quaternary volcanism in Italy - Petrology, geochemistry, geodynamics," released in 2005 via Springer. This version has an analogous constitution because the prior book, with a basic advent; numerous chapters devoted to diverse volcanic provinces in Italy; and a last bankruptcy at the relationships among magmatism and geodynamics. It comprises details that has develop into to be had within the final ten years, and new chapters were extra delivering precise discussions of the Oligo-Miocene orogenic volcanism on Sardinia and of a few small outcrops of fragmented volcanic rocks happening in different areas of the Apennines. This new version now covers the whole Tyrrhenian Sea magmatism of the final forty Ma. finally, it comprises appendices: Appendix 1 is an replace of the 2005 version appendix. Appendix 2 discusses the elemental ideas of igneous petrology, hint components and isotope geochemistry, offering geoscientists strange with petrology-geochemistry insights into how significant hint parts and isotopic info on volcanic rocks permit a greater knowing of magmatism and geodynamics.

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Syn-tectonic terrigenous turbidite and pelagic sedimentation, thrusting and HP–LT to Barrovian metamorphism took place during the compressional tectonic phases. Synorogenic metamorphic rocks are exposed at various localities of the mainland Tuscany, Tuscan archipelago and northeastern Corsica (Alpine Corsica). 85 GPa have been determined for the same units in the Giglio area (Franceschelli et al. 2004 with references), and for Cretaceous metabasites at Elba (P * 1 GPa, T = 300–350 °C; Bianco et al.

12 1 Magmatism in the Tyrrhenian Sea Region: An Introductory Overview ine nn i) pe uzz -A br tra a-A In mbri (U Ancona-Anzio Line Tuscany Ortona-Roccamonfina Line La tiu m ErniciRoccamonfina Pontine Islands Vulture a mp (Apulian) nia Sangineto Line -S Tyrrhenian Sea Plio-Quaternary volcanics Cala Aeolian Arc ily Ch an ne l janni Line Sic T indari-Leto Sicily Or ma ogen gm ic ati sm An m or ag og m en at ic ism bria oli mb tro Sardinia Ca Oligo-Miocene calcalkaline belt 41° Parallel Line Fig. 7 Magmatic provinces in the Tyrrhenian Sea region, as identified from major, trace element and isotopic characteristics of mafic rocks.

Several acid intrusive and extrusive rocks show a peraluminous character (Alumina Saturation Index, ASI1 > 1) Mafic rocks are mostly represented by dikes, lavas, and enclaves. They are generally saturated to oversaturated in silica, and show variable enrichments in potassium and K2O/Na2O ratios, from calcalkaline to ultrapotassic (Fig. 2c). An overview of Tuscany rock compositions is shown by variation diagrams reported in Fig. 3. These highlight a wide range of major and trace element abundances, with mafic rocks showing very high concentrations of Cr, Ni and Co, typical of unmodified mantle-derived magmas.

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