High-Mg subduction-related Tertiary basalts in Sardinia, Italy

Morra, Vincenzo Brescia; Secchi, Francesco; Melluso, Leone; Franciosi, Luigi

doi:10.1016/s0024-4937(96)00028-x

Cited by 56 publications

(44 citation statements)

References 63 publications

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“…Alternatively, at least some of the Sr-Nd isotopic heterogeneity could be related to shallow-level processes of crustal interaction, as proposed by other authors (e.g., Morra et al, 1994Morra et al, , 1997Brotzu et al, 1997aBrotzu et al, , 1997bConte, 1997;Lonis et al, 1997;Conte et al, 2010 Figure 9 shows the mixing line between a DMM-like source and Atlantic Ocean-type sediments.…”

Section: Osmium Isotope Ratiosmentioning

confidence: 73%

“…10a). The faintly LREE-enriched and HREE-flattened chondrite-normalized patterns additionally point to a spinel-bearing mantle source (Brotzu et al, 1997b;Morra et al, 1997;Franciosi et al, 2003;Lustrino et al, 2009). …”

Section: Accepted M Manuscriptmentioning

confidence: 98%

“…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).…”

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

“…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).…”

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

“…Partial melting of the sub-surface lithologies, favoured by the passive increase of the isotherms due to the adiabatic upwelling of the lithosphere-asthenosphere boundary during the beginning of the counter clock-wise rotation of Sardinia would have produced the lower "trachytoid" (actually dacitic to rhyolitic) sequence. The increase of the angular velocity of Sardinia would have allowed dense basaltic melt to reach the surface along normal faults (e.g., Morra et al, 1997;Mattioli et al, 2000). During the last phases of rotation, the arrival of partial melts generated by passive upwelling of sub-lithospheric magma could have induced strong thermal perturbations, favouring the production of highly differentiated melts representing the upper "trachytoid"…”

Section: Osmium Isotope Ratiosmentioning

confidence: 99%

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

Lustrino

Fedele

Melluso

et al. 2013

Lithos

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Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr-Nd-Pb-O-Hf-Os) and petrological view, LITHOS (2013), doi: 10.1016/j.lithos.2013.08.022 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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Section: Osmium Isotope Ratiosmentioning

confidence: 73%

Section: Accepted M Manuscriptmentioning

confidence: 98%

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

Section: Geological Background and Magmatic Evolutionmentioning

confidence: 99%

Section: Osmium Isotope Ratiosmentioning

confidence: 99%

See 3 more Smart Citations

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

Lustrino

Fedele

Melluso

et al. 2013

Lithos

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The Cenozoic fold-and-thrust belt of Eastern Sardinia: Evidences from the integration of field data with numerically balanced geological cross section

et al. 2016

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Newly collected structural data in Eastern Sardinia (Italy) integrated with numerical techniques led to the reconstruction of a 2-D admissible and balanced model revealing the presence of a widespread Cenozoic fold-and-thrust belt. The model was achieved with the FORC software, obtaining a 3-D (2-D + time) numerical reconstruction of the continuous evolution of the structure through time. The Mesozoic carbonate units of Eastern Sardinia and their basement present a fold-and-thrust tectonic setting, with a westward direction of tectonic transport (referred to the present-day coordinates). The tectonic style of the upper levels is thin skinned, with flat sectors prevailing over ramps and younger-on-older thrusts. Three regional tectonic units are present, bounded by two regional thrusts. Strike-slip faults overprint the fold-and-thrust belt and developed during the Sardinia-Corsica Block rotation along the strike of the preexisting fault ramps, not affecting the numerical section balancing. This fold-and-thrust belt represents the southward prosecution of the Alpine Corsica collisional chain and the missing link between the Alpine Chain and the Calabria-Peloritani Block. Relative ages relate its evolution to the meso-Alpine event (Eocene-Oligocene times), prior to the opening of the Tyrrhenian Sea (Tortonian). Results fill a gap of information about the geodynamic evolution of the European margin in Central Mediterranean, between Corsica and the Calabria-Peloritani Block, and imply the presence of remnants of this double-verging belt, missing in the Southern Tyrrhenian basin, within the Southern Apennine chain. The used methodology proved effective for constraining balanced cross sections also for areas lacking exposures of the large-scale structures, as the case of Eastern Sardinia.

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Reply to Comments on “the Cenozoic Fold‐and‐Thrust Belt of Eastern Sardinia: Evidences from the Integration of Field Data With Numerically Balanced Geological Cross Section” by Arragoni et al. (2016)

et al. 2017

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The comment by Berra et al. (2017) on the evidence of Alpine tectonics in Eastern Sardinia proposed by Arragoni et al. (2016) is based on the sedimentological interpretations of few local outcrops in a marginal portion of the study area. The Cenozoic Alpine fold‐and‐thrust setting, which characterizes this region, presents flat‐over‐flat shear planes acting along originally stratigraphic contacts, where stratigraphic continuity is obviously maintained. The ramp sectors present steeply dipping bedding attitudes, and there is no need to invoke and to force prograding clinoforms with unrealistic angles to justify them. The balanced geological cross section proposed by Arragoni et al. (2016) is fully supported by robust newly collected structural data and is compatible with the overall tectonic setting, while the interpretation proposed by Berra et al. (2017) lacks a detailed structural investigation. We believe that the partial application of the techniques available to modern geology may lead to incorrect interpretations, thus representing an obstacle for the progress of knowledge in the Earth sciences.

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High-Mg subduction-related Tertiary basalts in Sardinia, Italy

Cited by 56 publications

References 63 publications

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

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

The Cenozoic fold-and-thrust belt of Eastern Sardinia: Evidences from the integration of field data with numerically balanced geological cross section

Reply to Comments on “the Cenozoic Fold‐and‐Thrust Belt of Eastern Sardinia: Evidences from the Integration of Field Data With Numerically Balanced Geological Cross Section” by Arragoni et al. (2016)

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