Miocene rotation of Sardinia: New paleomagnetic and geochronological constraints and geodynamic implications

Residence time, mineralization processes and groundwater origin within a carbonate coastal aquifer with a thick unsaturated zone

“…The granites were affected by intense fracturing during the Corsica-Sardinia Miocene block rotation (Gattacceca et al, 2007). Magma injections from the Miocene calco-alcaline volcanism are present in the granite and correspond to dolerite veins in the West side of the plateau and pegmatite veins in the East side (Orsini et al, 2010).…”

Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr–Nd–Pb–O–Hf–Os) and petrological view

“…1). During the Langhian (~15 Ma) the Sardinia-Corsica block rotation ceased, thereby attaining its roughly N-S oriented present position (e.g., Vigliotti and Langenheim, 1995;Speranza et al, 2002;Gattacceca et al, 2007). The rotation of the Sardinia-Corsica block was associated with the opening of the Ligurian-Provençal back-arc basin and was roughly coeval also with the clockwise rotation of the Balearic Promontory and the opening of the Valencia Trough (Fig.…”

“…Oligocene igneous activity in Sardinia was sporadic, with the bulk of the orogenic igneous activity starting around 28 Ma (Lecca et al, 1997), and peaking during the 22-18 Myr time range (Beccaluva et al, 1985;Speranza et al, 2002;Gattacceca et al, 2007;Carminati et al, 2012, and and very rare basic-ultrabasic exceptions (e.g., basalts and picritic basalts of Montresta and Arcuentu, north-western and south-western Sardinia, respectively; Morra et al, 1997;Brotzu et al, 1997b;Downes et al, 2001;Franciosi et al, 2003;Beccaluva et al, in press). Trace element abundances and isotopic ratios of the less differentiated Late Eocene-Middle Miocene rocks led several authors to propose a derivation from a mantle wedge modified by slab-derived fluids (e.g., Morra et al, 1997;Mattioli et al, 2000;Downes et al, 2001;Franciosi et al, 2003;Lustrino et al, 2009;Conte et al, 2010;Guarino et al, 2011).…”

“…After a NE-SW striking rifting stage, mostly developed during the Oligocene, a ~55-60° Early Miocene counter-clockwise rotation separated the Sardinia-Corsica block from Europe (~22-15 Ma; Fig. 2; Gattacceca et al, 2007;Carminati et al, 2010Carminati et al, , 2012, and references therein). A branch of this rifting system is now identified in the Sardinian Trough (Fossa Sarda in the Italian literature), a ~220 km-long, ~40 km-wide middle Oligocene-Aquitanian rift system cutting the island from north to south (Lecca et al, 1997;Faccenna et al, 2002;Cherchi et al, 2008;Fig.…”

Stratigraphic vs structural contacts in a late orogenic basin: the case of the Tertiary Piedmont Basin in the Sassello area (Ligurian Alps, Italy)

“…Younger structures are gentle to open folds, developed in low greenschist facies metamorphic conditions (D 3 of Capponi & Crispini, 2002) and then non-metamorphic long-wavelength asymmetric folds and thrust faults that share the same top-to-the E-NE sense of shear (D 4 after Capponi & Crispini, 2002). These structures affect both the substratum and the TPB succession (Bernini & Zecca, 1990;Capponi & Crispini, 2002;Capponi & Giammarino, 1982;d'Atri, Piana, Tallone, Bodrato, & Roz Gastaldi, 1997;Mosca et al, 2009;Pasquarè, 1968;Spagnolo et al, 2007) and are generally interpreted (Capponi & Crispini, 2002;Spagnolo et al, 2007) as linked to the rotation of the Corsica-Sardinia block during Aquitanian -middle Miocene (Gattacceca et al, 2007;Maffione et al, 2008;Speranza et al, 2002).…”